Power Failure Alarm (CB25348E)

This circuit triggers an alarm when the mains power is cut off. The circuit was found in the July 1990 issue of Radio Electronics magazine.

| Clique na imagem para ampliar |

Two Transistors Amplifier (CB918E)
We found this two stage transistor amplifier circuit using RC coupling in a magazine published in...
Electronic Cigarette Lighter (CB4301E)
With a touch of S1 this circuit keeps a small strand of nichrome warm enough to light a cigarette....
SHTW2 Humidity and Temperature Sensors (COM073E)
August 2016 - It can be obtained from Mouser Electronics the new temperature and humidity sensors from...