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.
This circuit is from the National Semiconductor's Linear Applications Handbook of 1994. The...
This RF signal meter has a switch position that allows calibration and comparison of low intensity...
T We found this circuit in the 1960 Mullard transistor application manual. The circuit can be...