In the figure we have a circuit in which two moving bar/dot indicators are connected together to increase the number of LEDs. The circuit is from a Radio Electronics from October 1980.
The SLB0686A integrated circuit used in this application is not currently common. The circuit is...
We found this circuit in a documentation from 1989. It is intended for receivers that have an IF...
This small switched regulator was found in an 60’s Optical Electronics. The circuit uses an...