5 LED Log Scale with U257B (CB25442E)

The circuit was found in the February 1992 Radio Electronics magazine. The scale can be changed by changing R2 and R3.

Harmonic generator (CB9454E)
Found in a 90s Electronic Design, this circuit generates harmonics from a sinusoidal input signal....
Atomic Blast Detector (CB23517E)
Danger always exists and a nuclear war could be underway. Although we can't do more than detect the...
4mA to 20 mA Generator with the XTR115 and PGA309 (CB12534E)
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...