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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Adjustable High Q Notch Filter (CB15815E)
We can implement this filter with more modern equivalent operational amplifiers, since the LM110 is...
Electronic Gate (CB18086E)
We found this circuit in a 2005 documentation. The circuit allows the automation of a gate through...
10 W x 2 Ohms Amplifier TDA2003 (CB15716E)
The amplifier presented with the TDA2003 can provide a power of up to 10 W (rms) in a load of 2...