This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine. The circuit is use do observe signal in an oscilloscope.
This circuit of a few tens of milliwatts of power requires a single source. We found it in a Radio...
This circuit is suggested by Texas Instruments in his Optoelectronics Sourcebook. The transistors...
This circuit used in signaling for boats, cars or barriers was found in a 1980s documentation. It still...