This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
January 2017 - The new Schottky SDM02M30LP3 from Diodes Incoporated for 10 mA currents and 30 V...
This circuit activates a buzzer when the voltage applied to the input falls below a preset value in...
This circuit was found in an 80's General Electric documentation. The circuit uses components from the...