This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has a 50% duty cycle. It must be powered by 5 V.
This analog tachometer was found in Radio Electronics from the 90s. The components used can still...
We found this mains-powered switch circuit in Electronics Now magazine from July 1994. It could be...
This simple circuit controls the brightness of an LED from LDRs, NTCs, PTCs or other resistive sensors....