Difference between revisions of "Power Supply with an ATX PSU"

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[[Category:Ongoing_Projects]]
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[[Category:Closed_Projects]]
  
 
= Description =
 
= Description =
−
Create a lab Power Supply with an ATX PSU
+
Create a lab Power Supply from an [https://en.wikipedia.org/wiki/Power_Supply_Unit_%28Computer%29 ATX PSU].
  
 
= Components =
 
= Components =
−
* ATX PSU
 
  
−
= Link =
+
{| class="wikitable" style="text-align:left;"
 +
|+
 +
|-
 +
! scope=col | Shop
 +
! scope=col | Article N°
 +
! scope=col | Description
 +
! scope=col | Unit price (CHF)
 +
|-
 +
|Distrelec
 +
|[http://www.distrelec.ch/borne-ronde-%C3%B8-4-mm-noir/ritel/24-15-003/100538/fr 100538]
 +
|Laboratory socket black ø 4 mm
 +
|4.-
 +
|-
 +
|Distrelec
 +
||[http://www.distrelec.ch/borne-ronde-%C3%B8-4-mm-noir/ritel/24-15-003/100540/fr 100540]
 +
|Laboratory socket red ø 4 mm
 +
|4.-
 +
|-
 +
|Distrelec
 +
||[http://www.distrelec.ch/borne-ronde-%C3%B8-4-mm-noir/ritel/24-15-003/100546/fr 100546]
 +
|Laboratory socket green ø 4 mm
 +
|4.-
 +
|-
 +
|Distrelec
 +
||[http://www.distrelec.ch/borne-ronde-%C3%B8-4-mm-noir/ritel/24-15-003/100544/fr 100544]
 +
|Laboratory socket yellow ø 4 mm
 +
|4.-
 +
|-
 +
|Distrelec
 +
||[http://www.distrelec.ch/borne-ronde-%C3%B8-4-mm-noir/ritel/24-15-003/100542/fr 100542]
 +
|Laboratory socket blue ø 4 mm
 +
|4.-
 +
|-
 +
|}
 +
 
 +
 
 +
= Price =
 +
Depends of connectors number and of availability of an old working ATX PSU.
 +
 
 +
= Voltage =
 +
* +5VDC
 +
* +3.3VDC
 +
* +12VDC
 +
* -12VDC
 +
 
 +
 
 +
= People involved =
 +
*Fred
 +
*Speredenn
 +
 
 +
= Links =
 
http://www.semageek.com/diy-transformer-une-alimentation-atx-en-alimentation-de-laboratoire/
 
http://www.semageek.com/diy-transformer-une-alimentation-atx-en-alimentation-de-laboratoire/
 +
 +
http://pinouts.ru/Power/atxpower_pinout.shtml
 +
 +
http://www.sinux.net/2011/09/alim-atx.html
 +
 +
http://www.instructables.com/id/How-To-Build-A-Power-Supply-For-Electronics-Hobby/
 +
 +
= Pictures =
 +
[[File:PSU_1.JPG|200px]]
 +
[[File:PSU_2.JPG|200px]]
 +
[[File:PSU_3.JPG|200px]]
 +
[[File:PSU_4.JPG|200px]]
 +
 +
= 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.
 +
 +
I feel like wasting time, so here's some crappy ASCII art for this:
 +
 +
green-----------------
 +
            (grn)    |
 +
grey----R----|>|--o  o--------ON2
 +
                  |          /      ←{ this here is the SPDT switch }
 +
GND---------------o--------o/
 +
            (red)
 +
purple--R----|>|--------------ON1
 +
 +
= Components =
 +
 +
{| class="wikitable" style="text-align:left;"
 +
|+
 +
|-
 +
! scope=col | Shop
 +
! scope=col | Article N°
 +
! scope=col | Description
 +
! scope=col | Unit price (CHF)
 +
|-
 +
|Distrelec
 +
|[https://www.distrelec.ch/c%C3%A2ble-alimentation-atx-20-cm-24p-nt-20p-mb/maxxtro/aa-150-0613/679017/informatique/fr 679017]
 +
|24-pin (NT) – 20-pin (MB)
 +
|12.-
 +
|-
 +
|Distrelec
 +
||[https://www.distrelec.ch/borne-ronde-%C3%B8-4-mm-gris-clair/ritel/24-15-001/100536/fr 100536]
 +
|Laboratory socket light-gray ø 4 mm
 +
|4.-
 +
|-
 +
|}

Latest revision as of 12:54, 4 February 2012


Description

Create a lab Power Supply from an ATX PSU.

Components

Shop Article N° Description Unit price (CHF)
Distrelec 100538 Laboratory socket black ø 4 mm 4.-
Distrelec 100540 Laboratory socket red ø 4 mm 4.-
Distrelec 100546 Laboratory socket green ø 4 mm 4.-
Distrelec 100544 Laboratory socket yellow ø 4 mm 4.-
Distrelec 100542 Laboratory socket blue ø 4 mm 4.-


Price

Depends of connectors number and of availability of an old working ATX PSU.

Voltage

  • +5VDC
  • +3.3VDC
  • +12VDC
  • -12VDC


People involved

  • Fred
  • Speredenn

Links

http://www.semageek.com/diy-transformer-une-alimentation-atx-en-alimentation-de-laboratoire/

http://pinouts.ru/Power/atxpower_pinout.shtml

http://www.sinux.net/2011/09/alim-atx.html

http://www.instructables.com/id/How-To-Build-A-Power-Supply-For-Electronics-Hobby/

Pictures

PSU 1.JPG PSU 2.JPG PSU 3.JPG PSU 4.JPG

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 switch-mode power supply approach is favored. So far, a 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.

I feel like wasting time, so here's some crappy ASCII art for this: 

green-----------------
            (grn)    |
grey----R----|>|--o  o--------ON2
                  |          /      ←{ this here is the SPDT switch }
GND---------------o--------o/
            (red)
purple--R----|>|--------------ON1

Components

Shop Article N° Description Unit price (CHF)
Distrelec 679017 24-pin (NT) – 20-pin (MB) 12.-
Distrelec 100536 Laboratory socket light-gray ø 4 mm 4.-
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