This circuit was obtained from a 1986 Spanish magazine Resistor. The magazine no longer exists, but the circuit can still be easily assembled using a BD135 transistor for TR1. Power comes from either 6V or 9V battery.
This circuit was obtained from a 1986 Spanish magazine Resistor. The magazine no longer exists, but the circuit can still be easily assembled using a BD135 transistor for TR1. Power comes from either 6V or 9V battery.
