This balance indicator for stereo amplifiers was found in an 80's Elektor. The components used are common. Zeners are 1.8 V or close to that value.
April 2017 - The new Maxim Integrated MAX20733 and 20745 switched regulators are available from...
This 1980s circuit uses components of the era that can be replaced by modern equivalents. For the FET we can...
Found in a 2005 Linear Technology application manual, this circuit monitors the current in a load...