{"title":"Zero PCB Board \u0026 Circuits","description":"General Purpose PCB or Zero PCB or Dotted PCB also known as Perfboard are perfect for quick prototyping and can be used by students for school and college projects. These PCB's are also used by Hobbyist and in Industries for R\u0026amp;D and Testing of small circuits.\u003cbr\u003e\u003cbr\u003ePrinted circuit Board commonly abbreviated as PCB is the base(literally) of electronics. The PCB provides support as well as electrically connects various Electronic Components in the circuit.\u003cbr\u003e\u003cbr\u003e\nFor testing or for mounting your components you can either design and manufacture a custom PCB or else you can mount it on a zero PCB and accordingly make the connections. General Purpose PCB are perfect if you have not finalized the design or you are making the circuit just once like for a school or college project. ","products":[{"product_id":"electric-fire-alarm","title":"Electric Fire Alarm","description":"\u003cp\u003eA \u003cstrong\u003efire alarm is an electronic sounder\u003c\/strong\u003e or a bell. The sounder makes a loud high pitched sound to alert people that there is a fire in the building. Here the fire alarm devices sense the heat and activate the loud noise. There are many typical and complex fire alarm circuits available in the form of standalone devices. But this is a simple fire alarm circuit using LM358. This is a simple project which detects the fire and triggers the siren sound or a buzzer.\u003cbr\u003e\u003cbr\u003e This \u003cstrong\u003eElectric Fire Alarm Circuit\u003c\/strong\u003e is based on IR(infra-red) sensors. Fire has a lot of IR rays. In the given circuit IR sensor and R2 works as resistance divider networks. As the infrared rays fall on the sensor its resistance decreases and the value of R2 is fixed. This causes the voltage at pin 3 of the operational amplifier to increase. (on its non-inverting terminal). If the voltage set at pin2 of the operational amplifier (LM358) becomes less than the voltage of pin 3 then the output of the op-amp(operational amplifier) becomes high.\u003c\/p\u003e\n\u003cp\u003eThis\u003cstrong\u003e Electric Fire Alarm \u003cspan data-mce-fragment=\"1\" mce-data-marked=\"1\"\u003eKit\u003c\/span\u003e \u003c\/strong\u003eis the fundamental principle of operation of any operational amplifier ie if the voltage of the non-inverting amplifier becomes higher than the voltage of the inverting amplifier the output becomes high. The led D1 is used here for indication purposes only. The resistance R1 is used to protect the LED from overcurrent damage. The buzzer is an active buzzer(BZ1), whenever its pin1 goes high, it starts beeping.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eSchematic Diagram\u003c\/h3\u003e\n\u003cdiv id=\"p_info\" style=\"text-align: center;\"\u003e\u003cimg height=\"480x480\" width=\"480x480\" style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/files\/fire-alarm-circuit-diagram_480x480.jpg?v=1634539965\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/XeItj7-sedw\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Ova8HD60UCE\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708939808949,"sku":"LGZK001","price":129.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/fire-alarm-project-using-arduino.jpg?v=1634376013"},{"product_id":"water-level-alarm-circuit","title":"Water Level Alarm Circuit","description":"\u003cp\u003e\u003cstrong\u003eWater tank overflow\u003c\/strong\u003e is a common problem that leads to the wastage of water. Though there are many solutions to it like ball valves which automatically stop the water flow once the tank gets full. So here is a simple and handy DIY water alarm project that will guide you to make a circuit that will detect the water level and will raise an alarm upon getting the water tank full or a preset level.\u003cbr\u003e\u003cbr\u003e This \u003cstrong\u003eWater Level Alarm Circuit\u003c\/strong\u003e is a very basic circuit, describing the operation of 555 timers as astable mode. The time during which the water tank is full, the trigger pin is connected with the ground via low conducting water. As soon the water tank goes empty, it becomes disconnected from the ground and the 555 timer starts working as astable mode.\u003c\/p\u003e\n\u003cp\u003eIn this \u003cstrong\u003eWater tank overflow kit,\u003c\/strong\u003e a buzzer is there which gets triggered. All the components are circuit is standard as that of 555 timers in astable mode. There is a large number of circuits inside a 555 timer and it is generally used in two modes of its operation – astable mode and monostable mode. The LED D1 is used here for indication purposes only, ie as soon the power becomes available to the circuit, the LED gets turned on.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eSchematic Diagram\u003c\/h3\u003e\n\u003cdiv id=\"p_info\" style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" height=\"480x480\" width=\"480x480\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/files\/Water-Level-Alarm-circuit-diagram_480x480.jpg?v=1634540260\" alt=\"water-level-indicator-circuit-diagram\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/u03nQNJ96_w\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/QzPpCezdbCg\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708941480117,"sku":"LGZK002","price":129.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/water-level-alarm-circuit.jpg?v=1634378025"},{"product_id":"light-senstive-siren","title":"Light Senstive Siren","description":"\u003cp\u003eThe \u003cstrong\u003eLight Senstive Siren Circuit\u003c\/strong\u003e mainly depends on the light-dependent resistor for varying the sound in the circuit. These are also called photoresistors. Generally, light-dependent resistors will have high resistance in darkness and it is decreased when they are illuminated with the light. The photoresistors used here are two megaohm resistors i.e. they have resistance in the range of megaohms in darkness. In the present circuit, two resistors LDR and the 1K ohm resistor are connected in series. These are connected to the capacitor C2 of 100nf. The two pins of the sixth and second are shorted and connected to the same capacitor C2. The other end of the capacitor is connected to the ground. \u003cbr\u003e\u003cbr\u003eSpeaker is another component that plays a vital role in the circuit. \u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong\u003eLight Senstive Siren Kits\u003c\/strong\u003e \u003c\/span\u003etakes the electrical signals and translate them into physical signals. This acts as a transducer. Inside the speaker, there will a permanent magnet and the moving magnet. The electrical signals coming from the 555 timer IC are converted into vibrations using these magnets.\u003c\/p\u003e\n\u003cp\u003eThese \u003cstrong\u003eLight Senstive Siren\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003evibrations are heard at the output. Here the speaker used is a buzzer. This should be connected to the output pin 3of the 555 timer IC through an electrolytic capacitor C1. The positive terminal of the capacitor is connected to Pin 3 of the timer and the negative terminal is connected to the positive terminal of the buzzer. The negative terminal of the buzzer is grounded.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eSchematic Diagram\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\" id=\"p_info\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/files\/Light-Senstive-Siren-circuit-diagram_480x480.jpg?v=1634540485\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/3iEfL1qO4GU\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/KfX9H3rDH8w\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708941512885,"sku":"LGZK003","price":199.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/Light-sensitive-Alarm-Project.jpg?v=1634380922"},{"product_id":"toy-organ-using-555-timer-circuit","title":"Toy Organ using 555 timer Circuit","description":"The heart of this circuit is a\u003cstrong\u003e 555 timer IC.\u003c\/strong\u003e The 555 timers are operated in a stable multivibrator mode. In a stable multivibrator mode, the \u003cstrong\u003ecircuit produces accurate free-running waveforms\u003c\/strong\u003e, which can be adjusted. This is because of the resistance connected to the buttons. The low thresh hold voltage obtained at the sixth pin slows the charging and discharging of 10 microfarad capacitors at the speaker. As the resistance value increases voltage at the threshold pin decreases and low frequency passes through the speaker.\u003cbr\u003e\u003cbr\u003eThe \u003cstrong\u003eToy Organ using 555 timer Circuit\u003c\/strong\u003e consists of six resistors connected in series. There are six buttons connected in the circuit. When one button is pressed it produces a tone. Similarly, six buttons produce six different tones. That means, it just works as a toy piano. When the first button from the right is pressed it produces a high pitch tone. When the last button is pressed it delivers a low tone. \u003cbr\u003e\u003cbr\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/wkFY7nvtV8g\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/bcXSLbyBb4U\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40918283026613,"sku":"LGZK005","price":149.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/toy-organ-using-555-timer.jpg?v=1634382166"},{"product_id":"touch-sensor-using-555-timer","title":"Touch Sensor using 555 timer","description":"\u003cp\u003eThis \u003cstrong\u003eTouch Sensor using a 555 timer\u003c\/strong\u003e is a very simple touch sensor switch that is built with the 555 timer IC. You just need to touch the metal plate and the led gets energized and is kept in this state for about 100 seconds, then is turned off. This kind of \u003cstrong\u003esensor switch\u003c\/strong\u003e is suitable for making touch-operated bells, buzzers of small toys which operate for a small time and then switch off automatically.\u003c\/p\u003e\n\u003cp\u003eThe input impedance of the trigger is very high and the \u003cstrong\u003etouch sensor switch\u003c\/strong\u003e can be triggered by the voltage induced in the human body. The monostable mode of operation of 555 IC can be explained using a simple touch-sensitive circuit. Here, the timing constant (T) of the monostable timer= 1.1*R2*C2. The \u003cstrong\u003eTouch Sensor Circuit\u003c\/strong\u003e has been configured in monostable mode. A monostable circuit produces a single pulse(for a certain duration determined by the Timing Constant(T)=1.1*R2*C2) when triggered at pin 2.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/9i1pZheqEOk\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/Bauoj7nuP94\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708941709493,"sku":"LGZK006","price":129.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/touch-sensor-using-555-timer.jpg?v=1634383268"},{"product_id":"timer-machine-gun-circuits","title":"Timer Machine Gun Circuits","description":"The \u003cstrong\u003eTimer Machine Gun Circuits\u003c\/strong\u003e battery of 9V is connected to the speaker as well as PNP transistor BC557. Supply of 9V is given to pin no 8 and pin no 4 of 555 timer IC which are internally connected to each other. Here 555 timer IC works in astable mode. At pin no 5 and pin no 2, a capacitor of 10μF is attached. 3 electrolyte capacitors are also used of 10μF.\u003cstrong\u003e Timer Machine Gun \u003c\/strong\u003eTwo resistors are used of 100K and 33K. In which one resistor is attached between transistor and pin no 1 while the other is connected between pin no 2 and output pin no 3. The one end of the speaker is connected to capacitor C4 while another end is connected to capacitor C5. \u003cbr\u003e\u003cbr\u003eWhen the \u003cstrong\u003eTimer Machine Power Supply\u003c\/strong\u003e is on, the circuit starts working, which means the transistor will start work but since it is a PNP transistor it will work only when it gains low pulses. When it gains low pulses, the supply is reached to pin 8 of 555 timer IC which works in astable mode. Capacitor C5 act as a bypass capacitor which allows only the same frequency sound which leads to producing a sound on the speaker. The sound produced on the speaker is just like the sound produced by the machine.\u003cbr\u003e\u003cbr\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/XqZOXAoF0XA\" height=\"409\" width=\"727\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/fXzHD0gv4S8\" height=\"409\" width=\"727\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708941840565,"sku":"LGZK007","price":149.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/Timer-Gun.jpg?v=1634384573"},{"product_id":"hee-haw-electronic-siren","title":"HEE HAW\" Electronic Siren","description":"\u003cp\u003e\u003cstrong\u003eElectronic Siren 555 timers\u003c\/strong\u003e are generally used to generate timing pulse. It can be either monostable or bistable. Here the 555 timers are used somewhat differently. Its output is fed to its input, hence it works just like an oscillator. Two timers are combined to generate the desired sound.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e\"HEE HAW\" Electronic Siren\u003c\/strong\u003e values of resistors and capacitors can be changed to get some different frequencies of output. These \u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong\u003eElectronic Siren timers\u003c\/strong\u003e are like having your friend on-call 24\/7, ready to rock at a moment's notice! They make the most out of every last minute of your fireworks display; they save you time and money by fully automating old-school alarm clocks. It is also perfect for porch lights, holiday displays, or anything else that needs some custom timing down pat. \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/GeanMW8L3co\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/E9iOWqJDFgw\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708941938869,"sku":"LGZK008","price":149.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/hee-haw-siren.jpg?v=1634534909"},{"product_id":"voltage-regulator-circuit","title":"Voltage Regulator Circuit","description":"\u003cp\u003eA \u003cstrong\u003evoltage regulator\u003c\/strong\u003e is a circuit that creates and maintains a fixed output voltage, irrespective of changes to the input voltage or load conditions. Voltage regulators (VRs) keep the voltages from a power supply within a range that is compatible with the other electrical components. \u003cbr\u003e\u003cbr\u003e This \u003cstrong\u003evoltage regulator device\u003c\/strong\u003e may get damaged if there is any deviation from the fixed rate. The unregulated (variable) power supply gets converted into constant DC by this circuit. With the help of a voltage regulator DC, the unregulated output will be fixed to a constant voltage. The circuit is made up of linear voltage regulator 7805 along with capacitors. IC 7805 is a DC-regulated IC of 5V.\u003c\/p\u003e\n\u003cp\u003eThis \u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong\u003evoltage regulator circuit\u003c\/strong\u003e \u003c\/span\u003eIC is very flexible and is widely employed in all types of circuits like a voltage regulator. It is a three-terminal device and is mainly called input, output, and ground. Pin diagram of the IC 7805 is shown in the diagram. In the circuit diagram, C1 is the filter capacitor while C2 is the bypass capacitor. The e\u003cstrong\u003electrolytic polarized capacitors\u003c\/strong\u003e are employed for this purpose. For the purpose of filter capacitors normally 10mfd value of the capacitor is used. \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/_NLvpkGMGeI\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/ReKHEmqeHes\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708942037173,"sku":"LGZK009","price":129.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/voltage-regulator-circuit.jpg?v=1634535590"},{"product_id":"dark-light-detector","title":"Dark light detector","description":"\u003cp\u003eThis \u003cstrong\u003eDark light detector circuit\u003c\/strong\u003e is based on the working principle of LDR(Light Dependent Resistors). As the light falls on it, its resistance decreases. Using this property, we have designed a resistor divider network using R1 (LDR) and R2. As the light falling on the LDR increases, the value of R1 increases, and hence the voltage at pin 2 of the comparator IC(lm358) increases.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe dark light detector \u003c\/strong\u003eis the inverting terminal of the comparator. All the comparators have a unique property to compare the voltage between its two input pins viz inverting input and a non-inverting input. If the voltage of inverting pin becomes lower than the voltage of the noninverting pin, its output becomes high. Hence, we can summarize that, in dark conditions, as the light falling on LDR becomes low, the output becomes high in the given circuit diagram.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 15 x 12 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/wPBB0S1MxjI\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/Mk_BjFuw_hU\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Pjsoq-ZejRM\" height=\"400\" width=\"800\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708942102709,"sku":"LGZK010","price":169.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/diy-dark-light-detector.jpg?v=1634537842"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/collections\/toy-organ-using-555-timer_540x_1f610aa5-fda8-4339-b48e-2cc13abac82e.jpg?v=1639457007","url":"https:\/\/kitsguru.com\/de\/collections\/circuits-on-zero-pcb.oembed","provider":"KitsGuru","version":"1.0","type":"link"}