Commodore 64 PSU voltage regulation replacement boardDesigned by The Dark Forest in Sweden
NEW VERSION WITH ADJUSTABLE OUTPUT VOLTAGE AND 3A MAX Current batch has WHITE PCBs * TL;DR: Rebuild your original C64 PSU (power supply unit) with modern and reliable technology instead of buying a…Read More…
NEW VERSION WITH ADJUSTABLE OUTPUT VOLTAGE AND 3A MAX
TL;DR: Rebuild your original C64 PSU (power supply unit) with modern and reliable technology instead of buying a "saver" or new PSU.
The stock C64 PSU is infamous for damaging/destroying your computer when the PSU fails. The PSU consists of mainly two parts; 1) the iron core transformer which outputs 9V AC 2) the linear regulator board which transforms 9V AC to 5V DC
The second part is the weak link and can cause a too high output voltage. The original construction is ineffective, unreliable and produces quite a lot of heat (nice for warming you feet though). Keep the good part and replace the bad one!
This board is a modern replacement/upgrade with switched and filtered voltage regulation. The need for a so called "saver" is minimized/eliminated and you can keep on using your original Commodore PSU.
The board fits the beige wedge shaped PSU variant (fifth picture); Part No. 902503-06, Part No. 902503-11 and eventually more. Works with 110/230V and 50/60 Hz transformers.
*The voltage is slightly higher than 5.0V to compensate for the voltage drop across the power cable and other components. Commodore used the same technique for the stock board.
**For 1.5A+ loads; it is highly recommended to replace the stock power cord (between the PSU and the computer) to a new one with ~AWG17/1mm² wires for a lower voltage drop across the cable.
The installation requires: 1) Opening the PSU (more or less force is needed as parts are glued together) 2) Removing the original PCB and installing the the new PCB (soldering)
ALWAYS measure and verify correct output voltage and polarity BEFORE connecting the upgraded PSU to your C64.
The boards are hand-built and tested
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My goal is to ship within 2 business days. But there can be a longer delay (up to 1 week) when I'm away from home but I will always try to ship as fast as (my family life) permits :)
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