This indicator or VU meter for stereo amplifiers was found in a 90s Radio Electronics. The integrated circuit used is uncommon today.
The presented circuit makes use of a common operational amplifier that must be powered by a...
This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is...
This simple two transistor timer can be used to measure short time intervals. The power supply...