This circuit was found in a 73 magazine for radio amateurs of the 90s. The circuit uses two types of indicators, the diodes are for general use. The power supply is 5 V.
In the circuit we have a way of using a transistor to control the polarization of a class B tube...
This photometer is based on a Wheatstone bridge that must be balanced by the linear potentiometer P1. The...
This relaxation oscillator, simulated in the Multisim Blue, produces two different signals. The...