Found in a QST magazine from the 90s, this circuit broadcasts on different amateur radio bands depending on the coil. Data for the coil and crystal are provided next to the diagram.
July 2017 - Mouser Electronics already has Ricoh's new RP118x ultra-low current regulators in...
This is one of the many modulated siren versions that can be found on our website. We found it in a...
For trigger high power loads connected to the power grid, nothing better than using a TRIAC. For...