City Defence - Shards Software - 1983
Perdro - Imagine - 1984
Super Spy - Richard Shepherd Software - 1983
Moon Hopper - Dragon Data Ltd - 1983
Mansion Of Doom - Dragon Data Ltd - 1983
Final Countdown - Dragon Data Ltd - 1983
Shark Treasure - Dragon Data Ltd - 1983
Dragon 32 - SN: 075682
No Tape Deck or PSU
New Dragon 32 Owner
Re: New Dragon 32 Owner
Hi Boylinux,
Welcome to the forum.
For the missing PSU you can probably use a standard PC power supply, since it more or less delivers the voltages that the Dragon uses. I haven't tried this myself but I think other people on the forum have been doing this (Rolf?). Note that the Dragon 32 needs a -5V while the Dragon 64 needs a -12V. Old ATX supplies even had -5V but newer ones only have -12. It should be fairly simple to convert the -12 into -5 for the Dragon 32. Or inject the -12 into the Dragon internal PSU board, since it does conversion from ca -18V to -5 already.
Tormod
Welcome to the forum.
I guess you already know how to play tape files through a computer soundcard into your Dragon?No Tape Deck or PSU
For the missing PSU you can probably use a standard PC power supply, since it more or less delivers the voltages that the Dragon uses. I haven't tried this myself but I think other people on the forum have been doing this (Rolf?). Note that the Dragon 32 needs a -5V while the Dragon 64 needs a -12V. Old ATX supplies even had -5V but newer ones only have -12. It should be fairly simple to convert the -12 into -5 for the Dragon 32. Or inject the -12 into the Dragon internal PSU board, since it does conversion from ca -18V to -5 already.
Tormod
- rolfmichelsen
- Posts: 299
- Joined: Wed Apr 08, 2009 8:43 pm
- Location: Oslo, Norway
- Contact:
Re: New Dragon 32 Owner
Yep, I had to "improvise" a power supply a while back when my real PSU was lost (now recovered!). I ended up building a PSU from scratch rather than using a standard PC PSU. I can dig up the part list and create some schematics if there is an interest. The Dragon PSU is quite simple.
-- Rolf
-- Rolf
Re: New Dragon 32 Owner
Rolf,
Please upload those schematics! I have a friend with a Dragon 64 and no PSU and that will help for sure.
Please upload those schematics! I have a friend with a Dragon 64 and no PSU and that will help for sure.
Re: New Dragon 32 Owner
I always thought that Dragon 32 and 64 PSUs were identical in their output, am I wrong in this assumption?tormod wrote:Note that the Dragon 32 needs a -5V while the Dragon 64 needs a -12V.
Re: New Dragon 32 Owner
Yes, I think the (external) PSU is the same: It delivers AC 8.5V and AC 28V (with center tap). So if you find a one-to-one replacement for it there shouldn't be any issues. However, when connecting an alternative DC supply such as a PC ATX supply you will need to bypass the internal PSU (rectifier and regulator), which converts the AC 28V into +12V 0V -5V (Dragon 32) or into +12V 0V -12V (Dragon 64).
Graham E. Kinns' page is an excellent reference: http://dragon32.info/info/psu.html
BTW, my own PSU (UK model, square base) is labelled "Dragon 32K" but it might be from before the 64 was conceived anyway.
Graham E. Kinns' page is an excellent reference: http://dragon32.info/info/psu.html
BTW, my own PSU (UK model, square base) is labelled "Dragon 32K" but it might be from before the 64 was conceived anyway.
- rolfmichelsen
- Posts: 299
- Joined: Wed Apr 08, 2009 8:43 pm
- Location: Oslo, Norway
- Contact:
Re: New Dragon 32 Owner
The Dragon PSU is basically a transformer providing 1 x 8,5 VAC and 2 x 14 VAC output. This is a fairly common transformer and easy to come by.
I buy my parts from ELFA. The parts from the ELFA catalogue are:
-- Rolf
I buy my parts from ELFA. The parts from the ELFA catalogue are:
- Toroid transformer 55 VA, 8,5 VAC + 2 x 14,4 VAC (part no 56-109-10)
- 9 way female D-Sub connector (part no 44-160-54)
- 9 way D-Sub plastic hood (part no 44-085-06)
-- Rolf
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- DIY Dragon PSU
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