This “people detector” with pyroelectric sensor was found in the April 1991 issue of Radio Electronics magazine. The circuit is based on an LM324 and a sensor from that time.
Found in a 90s Electronic Design, this circuit generates harmonics from a sinusoidal input signal....
Danger always exists and a nuclear war could be underway. Although we can't do more than detect the...
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...