This circuit indicates a digital value through a moving bar. The circuit is TTL and must be powered by 5 V. We find this circuit in a Texas Instruments optoelectronics manual.
I found this circuit in an English publication from 1989. This configuration can be mounted with...
This circuit can be used to amplify signals up to 150MHz. The JFET can be MPF102 or BF245 and the...
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...