Fourth Order Low Pass Filter (CB14925E)

This filter, with a cut-off frequency of approximately 1 kHz, has a high Q and employs two operational ones. The power supply must be symmetrical.

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Robot Follow Line (CB20431E)
Here is a very simple robot circuit that follows the line driven by a small 3 V sevomotor that...
LM380 Gain 200 Amplifier (CB14171E)
This circuit, which provides a power of up to 3.5 W, can be supplied with voltages from 9 to 14 V....
Listening Transmitter Via Power Grid (CB19325E)
This circuit transmits the signal taken from a telephone line to a receiver placed nearby (up to a...