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Old 9th Apr 2014, 1:56 pm   #4
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Default Re: 18V mains power supplies for Hackers and similar

Most 78xx series regulators have a fairly constant current down the earth leg (3mA??) so a 7815 with 1k in said leg would work, mind you so would a plain 7815 or 7915, plenty of volts for a 18V Hacker. I can't see why a plain unregulated supply wouldn't be OK, 12V, bridge rectifier and a big cap, not much to go wrong. Most new 78xx series don't need an output capacitor either.