This circuit was found in an article in Electronics Now magazine from March 1997. The transistors are general purpose, and the indicator is a 1 mA full scale analog type.
In the figure we have the circuit of a millivoltmeter with operational Amplifier using a TLC271...
This receiver was found in a Japanese publication in 1967. The circuit uses germanium transistors and...
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...