This is the color sensor circuit diagram. Color sensor is definitely an exciting project for hobbyists. The circuit can sense eight colors, i.e. blue, green and red (primary colors); magenta,…

…then a 10k preset should be wired across the offset null terminals, pins 1 and 5, the wiper of the control being connected to the negative battery terminal. source: http://www.zen22142.zen.co.uk/Circuits/Testgear/connectiontester.htm…

Here is the wailing alarm siren circuit diagram: Components List: R1,R5___________ 4.7K R2______________ 47K R3______________ 10K R4______________ 100K Rx______________ *see text C1,C4__________ 100uF/25V, electrolytic C2,C3__________ 0.01uF (10nF), ceramic T1_____________ 2N3702…

…Looked Loop) oscillator circuit using a CMOS 4047 with a frequency of 22 KHz. Current drain is around 120mA. So, external power supply is recommended for better results. Source: http://www.zen22142.zen.co.uk/Circuits/Misc/insecrep.html…

…space. It is great for science fair projects or other science related projects where short range transmission is useful. It operates on 1.5 to 3 Volts, with small hearing aid…

The following diagram is the circuit diagram of voice transmitter which use FM signal carrier to transmit the vioce signal to the FM receiver device. Components List: R1 = 4.7K…

…Components List: C1 = 1nF C2 = 5.6pF C3,C4 = 10uF/16V C5 = 3-18pF Varco/Varicap R1 = 270 Ohm 1/4W R2,R5,R6 = 4.7K 1/4W R3 = 10K 1/4W R4 =…

…IC LM7805 to achieve 5V stabilized voltage. This circuit will be good to display your power supply output. Components List: R1 = 8K2 R2 = 47K / 470K R3 =…

…circuit. When the electric in your home/company has been shutted down for maintenance and or shutted down due to short circuit, you may need this circuit for backing up your…

…4 ohm speakers the power is 0.1W. At 6V into 4 ohm speakers it is 0.65W. At 9V it is over 1W. Components List: R1 R2_______10K R3 R4_______4R7 C1__________10uF mini…