This circuit was found in February 1976, Radio Electronics magazine. The circuit is quite sophisticated using a fast-acting (thermometric) sensor and analog indicator.
This circuit was obtained from an old publication from 1974 but can still be assembled with some...
This level matrix display was found in a 1994 documentation, but it can still be assembled, as the...
This circuit can be implemented with any triac of the TIC series and the lamp must be...