Why upgrade the Anet A8 head bed power supply
I’ve upgraded my Anet A8 to use an ATX desktop power supply(PSU) to power the heated bed.
The printer worked fine without it but I had a few ATX power supplies lying around and these Moset are quite cheap on eBay or Amazon so why not use one for this project/
The heated bed can take some time to heat up, there are also reports of it not lasting long. The bed can be upgraded with a power supply from and old ATX computer PSU quite easily.
I’ve already added a Mosfet to relieve the main controller board of handling the heated bed current using the main power supply. So now I’ll power the heated bed via the ATX PSU.
You can buy replacement PSU relativity cheaply but an even cheaper solution for me was to use an old desktop computer ATX power supply. I had already built a 24 Volt PSU for my Hot-wire CNC machine using two of them wired in series but you need to be very careful doing this.
Mine came from an old Dell Optiplex and rated to give 18A at 12V so this should be more than enough. Heat up time is quite quick now and the original PSU that ships with the Anet A8 doesn’t need to supply as much current.
Please be careful with the mains side of the PSU it can be dangerous if in doubt don’t do this mod.
Here’s a great video by MakerGeeks on how to wire it up.