This is a simple circuit of Touch switch activated relay. This circuit is used to turn on/off electronic relay using touch sensor. This circuit consist of two main parts, they are a decimal counter and an current amplifier circuit. This circuit is need a 5volts power supply. Here is the circuit:
As the counter circuit, this circuit uses JK flip flop. The flip flop will generate signal 0 and 1 that depends by the pulse applied. To provide the pulse, this circuit use the current amplifier that formed by two transistor. this circuit also equipped with power on reset. the power on reset is used to make sure that relay is turn off when the circuit is turn on for first time.