This circuit was found in Radio Electronics magazine from October 1964. The circuit uses two transistors of the time that require a supply voltage of 9 V. Consumption is 2.5 mA.
This circuit was found in a Radio Electronics magazine from August 1963. The transistors are...
In the figure we have a circuit in which the second tone recognizer remains disabled until the...
This circuit was found in a 1980 publication. This circuit converts a triangular input signal into...