Building a DIY C64 Power Supply (The Lazy Way)

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I made a simple replacement power supply for my Commodore 64 and my VIC 20 by using a 9V transformer and a pre-made 5V power brick and putting it into a nice case basically.
I kept the "preliminary fuse" of 315mA for the primary but settled on a larger 1.5A fuse for the 5V because 1A is underpowered (and causes problems, especially on the VIC20 which is a bit more power hungry).
ONLY ATTEMPT TO BUILD SOMETHING LIKE THIS IF YOU KNOW EXACTLY WHAT YOU ARE DOING. MAINS VOLTAGE CAN KILL YOU!
Ray Carlsen's C64 power supplies: personalpages.tds.net/~rcarlsen/
Greisi's PSU is in this video (everything's available for download from the video description, also the pinout of the C64 power connector): • GWB#1 - Commodore 64 /...
Here's the DIN 45329 plug you need: www.c64-wiki.com/wiki/Power_S...
Here's the case I used: www.reichelt.de/Kunststoffgeh...
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Thanks!

Опубликовано:

2 авг 2017

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Комментарии : 208

@RetroRecipes 6 лет назад

Great choice of case. It evokes the Amiga, yet is smaller than the original 64 PSU. I've ordered one for delivery to California and am going to do a similar (but different) process using a plug in transformer and a plug in switching power supply, both just dropped in the case and plugged into one mains extension lead. Watch this (well that, my) space! Good job Jan!

@discoHR 7 лет назад

Nicely done. Thanks for the info about gaps on the user port, didn't know that.

@natgrant1364 5 лет назад

I definitely want to build one of these. Seems like a good idea considering that the 5V line would actually be safer.

@Pittsburghfix 7 лет назад

Nice timing, I got my din connectors in yesterday and was about to tackle the same job.

@raymondheath7668 3 года назад

Thanks, I built it into a computer power supply box and it works great. added a bridge rectifier to another set of taps on my surplus xfmr and a step down buck converter for the already installed 12V internal fan although I don't think it was necessary

@dash8brj 7 лет назад

Thats a fancy project box. Great video as usual. I need to get motivated to make my PSU :)

@alexsinclair2012 7 лет назад

Thanks for the suggestion!

@MariaEngstrom 7 лет назад

Really nice work! That case is beautiful too. A C= logo should look really good on that case. :)

@MindFlareRetro 7 лет назад

I'm glad I have waited and read through all the comments thus far. My generic supportive comments notwithstanding -- yet another great video -- you continue to spark conversation and debate. Seriously people, what's the worst that could happen? My hat's off to you, sir. You are doing more for the Commodore community than most of us are, so bravo and keep up the great effort.

@PabloSanchezEsteban 5 лет назад

Very nice video, I made myself a power supply with other components, but same logic! Thanks Jan!

@danielmantione 6 лет назад

Jan, if you want to a proper load test of the power supply, you need to connect a datasette to a breadbin. In my own power testing, the worst case for the 9V AC part of the C64 power supply is a when the datasette is doing rewind at the beginning of a tape (i.e. the casette cannot spin). You should measure the AC voltage at the user port under that condition.

@paulfnicholls 7 лет назад

Keep em coming mate :)

@RHWarrior 6 лет назад

This looks good and will do the job great, can't see any big problems here, certainly two steps up from an ancient resin filled Commodore brick! A small refinement would be a "naked" 5V part w. some passive cooling, I like this solution though.

@alerey4363 5 лет назад

hi, the diagram may be wrong; if u need 5 V take it from the 2ndary of transformer, then rectify and filter and regulate (if talking about linear psu); in fact u need to take more than 5V taking into account all the voltage drops of rectifier + filtering + regulation up to the real load, but it's relatively easy to have a 2ndary transformer with a couple of exit points for various voltages (AC)

@peterc6475 3 года назад

built my c64 psu from this video works great, i used my old psu cables for the power and connection lead.

@cbmeeks 7 лет назад

Awesome video! You should paint a C= logo on the top.

@danedewaard8215 5 лет назад

Hi, Just wondering what the Sony 5 vdc supply measured, no load? I have a Sony 5.2 vdc e-Book supply that measures 5.32 vdc, no load. I'm just wondering if that would be OK to use, as is, or if I should add a ~1 meg resistor in series, to drop it down? Thanks in advance!!!!

@jasejj

I just built something similar. My "design" was more ghetto than yours 😊 I started with a broken C64 PSU, took the potted block out of it, then grabbed an old 9VAC wall-wart, and a 2A phone charger with an EU plug on it (I'm in the UK so this was useless to me, and unused). The input fuse is in the UK mains plug so not needed in the PSU. I cracked the two power supplies open and araldited the linear transformer in the case, and hot glued the switching supply (as I figured this would break sooner than the linear one). Then used choc-block connectors to wire it all up - other than patching the 5V lines no soldering required, and all the cabling already present as I re-used the broken supply's wires.