This temperature compensated circuit was found in a 1980s American documentation. The power supply is made with 5 V which allows its use as a shield.
I found this circuit in a 1992 Electronics Experimenter Handbook. The circuit can be easily...
This egg timer has been found in an English magazine that no longer exists in 1982. The...
This comparator application circuit was obtained from the June 1986 Radio Electronics magazine. The...