This miniature railway control circuit was found in an English documentation from the 1980s. The integrated circuit is an operational amplifier.
This circuit was found in a 1999 documentation, but it can still be easily assembled today, as the...
This circuit, found in a 1988 documentation consisting of an audio switch that turns off the load...
Launched in 2016 but with documentation reviewed in June 2017, the Texas Instruments TLV854x...