quicksilver96
100+ Head-Fier
- Joined
- Nov 8, 2005
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Quote:
steve - that is definitely enough current to charge even the longest lasting NiMH rechargeables that I have seen at the standard .1C trickle charge rate. Seeing as how it is unregulated, it may even put out enough voltage for the 8 cell (9.6v) series of batteries. It does put out enough current to charge the batteries and run the PPAS though you may have audible noise introduced into your circuit. The other thing to worry about if you plan to listen with the power supply plugged in is isolation. Many cheap power supplies tie V- to earth ground, this creates a problem as it will fight your TLE set virtual ground which is a few volts above earth ground. The TLE will not win this fight. This will not be a problem if you only use the wall wart to charge the batteries.
Originally Posted by pddjsteve So I was going through some old electronics crap I've got sitting around, and found that I've got a wall wart (probably unregulated?) that puts out 24V @ 100mA, and my PPAS is drawing about 40mA. Will this be ok to use with a pint-style trickle charge circuit (lm317, resistor, diodes) or should I be looking for something with a bit more current avaialble? |
steve - that is definitely enough current to charge even the longest lasting NiMH rechargeables that I have seen at the standard .1C trickle charge rate. Seeing as how it is unregulated, it may even put out enough voltage for the 8 cell (9.6v) series of batteries. It does put out enough current to charge the batteries and run the PPAS though you may have audible noise introduced into your circuit. The other thing to worry about if you plan to listen with the power supply plugged in is isolation. Many cheap power supplies tie V- to earth ground, this creates a problem as it will fight your TLE set virtual ground which is a few volts above earth ground. The TLE will not win this fight. This will not be a problem if you only use the wall wart to charge the batteries.