General > General Technical Chat
Show your favorite and most used benchtop PSU
peter.mitchell:
well considering the float voltage of a "12v" lead acid battery is between 13 and 14v... i'd say it's already a terrible starting point as the 12v rail of the pico psu isn't regulated... this also means you REALLY shouldn't use it with anything other than a "real" 12v source, i mean a 3s/4s lipo are both terrible because a 3s drops to 9v when approaching flat and a 4s is 16.8v when fresh of the charge! and if you bump your 12-19v 3-5a psu and it starts putting out 19v, you better make sure you have paddles in your boat because you're up shit creek.
Kibi:
I have a new addition to the family.
Yesterday at a certain car boot sale in Luton I managed to pick up this Solartron AS1410.2 Power Supply. It only cost me £5 :)
I believe it to be of 1967 sort of vintage. The AS1410.2 is a 30V 1A unit with external programming and master / slave abilities.
The output voltage is set with the thumb wheels to a resolution of 100mV and the measured output is pretty much spot on. The current limit is set with the two knobs below the meter with a resolution of 10mA.
The meter is unique in the way that it operates. Rather than display the output current directly, it displays the percentage of the set current limit.
I'll have to take the lid off one day when I find some time.
ajb:
Favorite would be the two Power Designs units, even though they're in need of some TLC. I got them with the thought of replacing the meter movements with a little LCD and mcu control, but the second I opened them up and saw the beautiful construction inside I lost the will to do anything but a faithful restoration. The 3650 uses a freaking variac for coarse voltage adjustment! Unfortunately flaky pots on the TW5005 make it essential to adjust the voltage BEFORE connecting the load, unless the load can tolerate intermittent 50V spikes as the wiper skips across the bad spots in the pots. :-BROKE
Most used would be a little ATX PSU front end I made a long time ago as a poor recently-former student. Most of what I work on at home just needs 3.3, 5, or 12VDC, so it's met my needs pretty well. Regulation on this particular PSU is very clean even with no external load connected. The back has a panel mounted ATX connector so the power supply itself can live under the bench and fuses for each of the voltage rails. The knob controls a little LM317 adjustable reg for the channel with the green LED, and the other channels are +3.3V, +5V, and +12V respectively. The enclosure is an old parallel port switch box with some holes JB Welded over and some new ones drilled.
Lately I've been wanting to do some more analog stuff at home, so a little dual tracking supply is somewhere on the long list of pending projects.
monochrome:
Two German power supplies made by Statron Gerätetechnik GmbH. The guys at Statron are pretty cool, any problems or questions about their products and they will send you all schematics and stuff, even for the older models.
Type 2224.1
Single output, 0-24V DC 0-6A.
10 turn voltage pot, 270' current pot.
Cooling: 92mm fan.
Type 5340.1
Dual output, 0-12V DC 0-3A, 3~6~9~12V AC 3A.
270' voltage and current pot.
Cooling: convection.
jlmoon:
has great regulation.. :-+
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