Circuit diagrams and schematics - Electronic projects

When entering the power supply circuit, and switch S1 (Start), which is attached press release switch off.Then current is flowing through R1, R2, and C2. Makes the capacitor C2 caused up When the switch S1 allows the C2 to discharge through R3. The pressure this causes the clock input to the pin 8 of IC1a. [...]

This circuit uses the nand gate IC number is 4011B per Clock signal generator circuit, feeding it with the pin number 14 of the IC counter circuit 4017B.When you press and hold the switch S1 C1 will discharge. Causing current flow through D1 as a result, IC1 work.Clock generator and input to IC2. IC2, which [...]

When you want the counter circuit since 0 arrive at 99. I thinks this circuit may on the same wave length you certainly. it uses IC LM4017 decade counter/divider follow circuit picture. When feed a signal clock at 14 pin cause the position logic at a pin output. From 0 to 99 for switch S1 [...]