Killed by 9V Batteries never planned to record an album. All the band intended to do was score a short film frontman Wolfgang Möstl was making. But before the Austrian quartet could finish, its ...
This Design Idea describes a 9V battery-voltage monitor whose total parts cost less than 34 cents (Figure 1). You configure transistor Q 1 as a 10-mA current sink. LED 1, a Kingbright WP7104IT, is on ...
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