2MHz astable (CB9102E)

This TTL circuit can be used as a shield. The frequency can be changed by changing the capacitors.

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...