Wien Bridge
This Vienna bridge oscillator generates a sinusoidal signal whose frequency depends basically on C2 and C4. The circuit is from an Electronics Now from December 1993.
The 4518 can be cascaded to count to values higher than 10. The output EN of this device can be...
This instrument was obtained in a documentation for radio amateurs of 1976. The circuit measures...
We found this circuit in a 1966 US documentation. It simulates a variable capacitor that can vary...