Microcontroller controlled dimmer (CB25087E)

This circuit was found in a Radio Electronics magazine from October 1987. It can be used as a shield for incandescent and heating elements.

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Simple LED Indicator (CB4554E)
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that...
Timed Intermittent Alarm (CB17488E)
We found this circuit in a 1986 publication. However, as it is based entirely on 555 integrated...
True RMS Meter (CB24789E)
This circuit with an integrated circuit of the time was found in the magazine Radio Electronics of April...