This circuit can be used in a signal level indicator with LEDs. The circuit is from an Electronics Now dated January 1996. The power supply must be dual.
This bistable control uses a 4069 as bistable. The circuit can drive relays up to 100 mA with the...
This transistor tester with different gain ranges was found in documentation from the 1980s. The...
We found this circuit in a 1976 documentation. The FET can be the BF245 and the bipolar transistor a...