[[Category:Ongoing_ProjectsClosed_Projects]] = Status =On going...
= Description =
Create a lab Power Supply with from an [https://en.wikipedia.org/wiki/Power_Supply_Unit_%28Computer%29 ATX PSU].
= Components =
= Those interested People involved =
*Fred
*Speredenn
http://www.sinux.net/2011/09/alim-atx.html
http://www.instructables.com/id/How-To-Build-A-Power-Supply-For-Electronics-Hobby/
= Pictures =
= Update: PSU with regulate output =
It is a better idea to have the ATX set up in a box and to use the ATX connector to connect to the banana plugs. Basically, it is then possible to have the 5 usual plugs (GND, +3.3, +5, +12, -12) and add a regulated output (0-12V). The visualization for that regulated output can be analogical. However, if the system uses a micro-controller (see Buck converter below), a digital screen could be an option. That would also be great to have a current limiter on that regulated output. Linear regulators are excluded for this improvement because they dissipate way to much energy. A [https://en.wikipedia.org/wiki/Switched-mode_power_supply switch-mode power supply] approach is favored. So far, a [https://en.wikipedia.org/wiki/Buck_converter Buck converter] is considered. = Options =I suppose it is good to have at least 2 LEDs, a red and a green, each with a 220Ω resistor in series. turning on the PSU can be done with a SPDT switch, that is: ''on1 - on2.''* red LED is between ''on1'' and purple (standby 5V)* green LED is between grey (power OK) and ''on2'' (or GND, for that matter)* green cable is soldered onto ''on2''* middle point of the SPDT switch is on GND this has the following consequences:* when PSU is on mains and switched off, the red LED is on* when flipping the switch, PSU turns on ; after about a second the green LED lights, indicating all is good.
That would be great to have a current limiter on that regulated output also.I feel like wasting time, so here's some crappy ASCII art for this:
It might be possible to use a LM317 for green----------------- (grn) | grey----R----|>|--o o--------ON2 | / ←{ this here is the voltage control.SPDT switch } GND---------------o--------o/ (red) purple--R----|>|--------------ON1
= Components =