This circuit was found in an American 1990s documentation. It can directly trigger a triac when light is detected by the sensor. The integrated circuit is common, like the 741.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
This circuit was found in a 1980s English publication, but can still be easily assembled by the...
Originally suggested by Electronic Design in a 1965 documentation for use with oscilloscopes, this probe has...