With just a low cost DC adapter and the circuit described here it is possible to build a low cost stabilized, uninterruptable 9V supply. On the grounds of safety and economy, a simple unstabilized 12V ...
You can save your stereo settings and prevent grief with your alarm system by using, or making, a 9-volt battery adapter to plug into your cigar lighter/power point. The battery voltage will be enough ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results