741 Filter (CB24265E)

The 1 kHz tuned filter shown uses a 741 op-amp. The components can be re-scaled to suit the desired frequency.

Remote control receiver (CB21914E)
The frequency depends on the coil and is not found in the original documentation but should be...
Digital Do Nothing (CB26218E)
This is a device for those who need to show that they know how to use digital electronics but have...
Sinusoidal generator CA3130 (CB21987E)
Using an operational amplifier with FET, this circuit from a 1977 publication can generate...