openbench:psu
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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openbench:psu [2007/12/03 16:36] 127.0.0.1 external edit |
openbench:psu [2014/03/26 04:20] davidcary yet more more-or-less open-source designs for a bench power supply |
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| * voltage (for adjustable outputs only) | * voltage (for adjustable outputs only) | ||
| * current (for adjustable outputs only) | * current (for adjustable outputs only) | ||
| - | * current limiting active (constant voltage / constant current) (all outputs) | + | * current limiting active (constant voltage / constant current) (all outputs) (red LED) |
| Options: | Options: | ||
| * combine to 0-60V / 2A (series) | * combine to 0-60V / 2A (series) | ||
| * combine to 0-30V / 4A (parallel) | * combine to 0-30V / 4A (parallel) | ||
| - | * link voltages (can be used for parellel mode or symetric output) | + | * link voltages (can be used for parallel mode or symmetric output) |
| + | |||
| + | ====== comments ====== | ||
| + | |||
| + | What happens when the power supply output voltage is set to 3.3 V, and I hook that output up to a 12 V battery? | ||
| + | Which is better: | ||
| + | * The PSU pulls the voltage down to 3.3 V (or as close as possible until it hits the current limit)? or | ||
| + | * The PSU supplies zero current, letting the voltage float up to 12 V? | ||
| + | |||
| + | ---- | ||
| + | |||
| + | Should have a 3.3v fixed output as well as the 5v. Easy enough to handle. 1A should be good for most purposes on the fixed supplies. Elektor ran a switching PSU module in April that I made some tweeks on and currently as waiting on boards. Galvanically isolating the adjustible supplies is a potential issue. As soon as you hook a meter panel up, the two supplies are tied together. Hack around it by using two MCUs for A/D and transmitting to a third one via optoisolators?--pstemari | ||
| + | |||
| + | ====== Further reading ====== | ||
| + | |||
| + | * "Bench power supply tutorial" https://www.adafruit.com/forums/viewtopic.php?f=8&t=24200 | ||
| + | * "Bench-Top Power Supply" by James Littlejohn for the Tulsa Electronics Club | ||
| + | * "Building a digitally controlled bench power supply using an AVR" http://electronics.stackexchange.com/questions/18249/building-a-digitally-controlled-bench-power-supply-using-an-avr | ||
| + | * DIY Variable bench power supply http://www.instructables.com/id/DIY-Variable-bench-power-supply/ | ||
| + | * DIY PSU into Bench Power supply http://www.instructables.com/id/DIY-PSU-into-Bench-Power-supply/ | ||
| + | * DIY digital bench power supply http://hackaday.com/2011/06/06/diy-digital-bench-power-supply/ | ||
| + | * My DIY Bench Power Supply http://www.swharden.com/blog/2012-12-18-my-diy-bench-power-supply/ | ||
| + | * DIY Bench Power Supply http://www.adwiens.com/projects/electronics/07/index.html | ||
/home/ladyada/public_html/wiki/data/pages/openbench/psu.txt · Last modified: 2016/01/28 18:05 (external edit)
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