Mains Pulser
The pulser is intended to switch the mains voltage on and off at intervals between just under a second and up to 10 minutes. This is useful, for instance, when a mains-operated equipment is to be tested for long periods, or for periodic switching of machinery. Transformer Tr1, the bridge rectifier , and regulator IC1 __
Mains Remote Alert
Beeper and/or LED remotely-operated via mains supply line; Simple circuitry, easy to build units __ Contact: Flavio Dellepiane, fladello @ tin.it
Mains Slave Switcher Ii
As a guide, a one-inch reed switch with 40 turns reliably switched on with the current flowing through a 150-watt lamp (approx.625 mA) but larger reeds may require more turns. If the master appliance draws less current (which is unlikely with power tools) more turns will be required. The reed switch is used to __ |