Difference between revisions of "Replacement power supply unit"
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Latest revision as of 16:58, 5 August 2014
It is relatively easy to build a replacement power supply for a Dragon 32 or 64 if the original stops working. The external power supply is basically a transformer connected to a 9 pin D-sub connector. The diagram shows how the transformer is wired to the 9 pin D-sub connector. D-subs always have numbers printed on them so it is impossible to get the wiring wrong.
The trick is to find a suitable transformer. The colour codes specified in the diagram are for a transformer purchased from ELFA, a relatively big vendor of electronics components and equipment in Scandinavia. The table below lists part numbers from the ELFA catalogue.
| Count | Description | ELFA part number |
|---|---|---|
| 1 | Toroid transformer 55 VA, 8,5 VAC + 2 x 14,4 VAC | 56-109-10 |
| 1 | Female D-sub 9 way | 44-160-54 |
| 1 | D-sub plastic hood | 44-085-06 |
