In a message dated 7/5/00 7:12:13 AM Eastern Daylight Time, other@............... writes: << It may also be worth while making up a separate plus and minus 12 volt regulated non switch mode power supply for the analogue parts of the electronics. I do this in computers where I need to get clean audio in and out. >> Dual plus and minus power supplies (non-switching) are easily made from parts all of which are usually in stock at your local Radio Shack. Buy two 12.6-volt transformers, Two full-wave bridge rectifiers, Two 1000 mfd electrolitic capacitors, Two 12-volt positive regulators and two 0.1 mfd capacitors. Build two separate 12-volt power supplies and hook them in series to make a +12V, -12V dual power supply. Radio Shack sells a little book about power supplies which you should also buy if you are not sure how to hook the above stuff together. With the help of the little book anybody can build their own dual power supply for far less than an off-the-shelf dual supply would cost. Have fun, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>