1 kHz low pass filter (CB7579E)

This filter can be implemented with almost any operational. The power suppply must be symmetrical.

Long-lasting flasher LM3909 (CB25422E)
This circuit can flash for up to 30 months using alkaline batteries as shown in the table next to the...
Bargraph TTL voltmeter LM3914 (CB14430E)
This circuit accurately monitors a 5 V TTL source. The circuit is from National Semiconductor's Linear...
Signal Level Shifter (CB4931E)
The purpose of this circuit is to match two operational amplifiers that operate with different...