Tuesday, February 2, 2021

Dreamcast battery mod...

I ordered some parts to swap out the battery in the Dreamcast. I bought a vertical mount CR2032 coin cell battery holder and some BAT85 diodes. 


 Here's the controller PCB out from the console. I desoldered that battery since it's pretty much dead. Even if I left the console on for a few days, the battery would only hold the charge for no more than day. I also desoldered part of the resistor to the left. The mod that I learned from Voultar (mod instructions found HERE as well) was to add a diode to the longer end of that resistor to cut the charging circuit so it won't try to charge the removable, non-chargeable battery. 

I had to squish and zoom in for this shot. Here's the vertical battery holder and the diode installed. The cathode (-) of the diode is facing toward the mainboard and the anode (+) to the resistor.


Top down shot of it. 

It does power back on after the mod, and I did set the time. Testing it the next night (I did this the day before), and it seems to have kept the date and time settings just fine. So glad it'll be easier to swap out the batteries when it dies. I'm gonna have to open up my other Dreamcast and do the same mod for it.

That's all for now. 

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