| A universal voltage tester should respond to both dc and ac voltages. The usual types with glow-discharge lamps only work with voltages grea...
All items tagged with LED and DC (14)
| I 00 Moreover, the 1537A is de- signed for a high slew rate, resulting in low transient inter- modulation and a wide bandwidth, so that it c...
| audio-controlled loudspeaker monitor What started out simply as a universal audio-controlled switch for an active loudspeaker has grown into...
| Ordinary LEDs have a rather monot- onous diet: they will only "swallow" DC current with the right polarity, in which case a series resistor...