Windshield wiper tiner (CB9523E)

Found in old documentation, this circuit can be implemented even today with the use of a 2N2646 for the unijunction and a TIC106 for the SCR.

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Ultrasonic Pickup (CB13321E)
The MOS field effect transistors of this circuit are not very common, as it is a project from the...
EMI filter on the interfering device (CB15429E)
If interference occurs in several receivers, much more interesting than placing a filter on each...
Li Ion Battery Charger (CB5410E)
This single-cell Li-Ion battery charger was found in a 2005 Linear Technology manual. The circuit...