This is the circuit diagram of beeper sound. The circuit will generate the sound of a beeper which similar with the one in pagers. It produces a “beep-beep” sound. The work of this circuit is simple, the circuit applied the 555 timer oscillator which is turned ON and OFF periodically.
Do you have a bicycle..? why don’t try to build this circuit..?. Powered using battery 3-6V. This circuit will help the bicycle driver in the night and help other people to know your presence. Switched ON Bike Lamp circuit diagram: Component part list: R1 = Photo resistor (any type) R2 = 22K 1/2W Trimmer Cermet or Carbon type R3 = 1K R4 = 2K7 R5 = 330R * R6 = [...]
This is the very simple way to play a song with single 1.5 battery. You can build this circuit for gift acceccories. When the gift opened, then a song will be played.. It’s easy and cheap right..? . It just use a single small chip which will generate a song which already planted inside the chip. Here the circuit diagram: Components List: C = 1uF R = 4.7KW Q = [...]
Here the circuit diagram of Lantern dimmer/flasher designed by Tony Van Roon: Electronic parts List: R1 = 100K R2 = 100K R3 = 100K R4 = 100K R5 = 3K9 R6 = 3K9 R7 = 470 R8 = 100 R9 = 220, 1/2 watt P1 = 5K C1,C3 = 10uF/16V C2 = 0.01uF, ceramic T1 = 2N4401 T2 = TIP32 U1 = LM358 L1 = Lantern Bulb S1 = On-Off [...]
