Category Archives: Power Supply

Extending Battery Life with Switching Regulator

Posted on May 4, 2011 by Rend

A normal 9V battery would be considered as dead battery when the voltage falls below 7 Volts. With this switching regulator, a  lifetime of a 9V battery will be extended by boosting the voltage if the battery voltage falls under … Continue reading →

Posted in Power Supply | Tagged , | Comments Off

Remote On-Off Switch through Small Transformer

Posted on May 1, 2011 by Rend

This is a remote on-off switch circuit. With this circuit, we can take the benefit of using small switch to control larger AC current from high power devices. Safer operation is the other benefit, since this circuit is control the … Continue reading →

Posted in Control Electronics, Power Supply | Tagged , | Comments Off

Simple Battery Monitor

Posted on April 25, 2011 by Rust

When battery voltage drops to a certain level set by 10k pot, this simple battery monitor circuit energizes a LED. For reading battery voltage in 1 V steps or even steps as small as 0.1 V, we can add any … Continue reading →

Posted in Lighting and LED Circuit, Power Supply, Test and Measurement | Tagged | Comments Off
« 1 2 3 4 5 6 7 8 9 10 11 12 ... 33 »