openbench:psu
Differences
This shows you the differences between two versions of the page.
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openbench:psu [2011/01/15 05:25] pstemari |
openbench:psu [2016/01/28 18:05] |
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| - | ====== What ====== | ||
| - | A simple adjustable DC power supply: hardware | ||
| - | For more info, read about [[start|openbench]] | ||
| - | |||
| - | ====== Notes & stuff ====== | ||
| - | ===== Design constraints ===== | ||
| - | Outputs: | ||
| - | * 2 adjustable outputs | ||
| - | * 1 fixed output | ||
| - | |||
| - | Voltage: | ||
| - | * adjustable outputs: 0-30V, adjustable | ||
| - | * fixed output: 5V | ||
| - | |||
| - | Current: | ||
| - | * adjustable outputs: 0-2A, adjustable | ||
| - | * fixed output: 2A | ||
| - | |||
| - | Indication: | ||
| - | * voltage (for adjustable outputs only) | ||
| - | * current (for adjustable outputs only) | ||
| - | * current limiting active (constant voltage / constant current) (all outputs) (red LED) | ||
| - | |||
| - | Options: | ||
| - | * combine to 0-60V / 2A (series) | ||
| - | * combine to 0-30V / 4A (parallel) | ||
| - | * link voltages (can be used for parallel mode or symmetric output) | ||
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| - | |||
| - | ====== comments ====== | ||
| - | |||
| - | What happens when the output voltage is set to 3.3 V, and I hook it 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? | ||
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| - | 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 | ||
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/home/ladyada/public_html/wiki/data/pages/openbench/psu.txt · Last modified: 2016/01/28 18:05 (external edit)
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