This circuit is from 1994, from a technical documentation from National Semiconductor, but can be adapted to work with more modern components.
This circuit adds a beep to turn on with car flashers that do not have this feature. A 47 ohm to...
This circuit that can amplify signals from 0 to 30 MHz was found in a 90s Popular Electronics....
We found this solid-state relay circuit that can function as a shield in a Radio Electronics...