iamlark Posted September 8, 2005 Report Posted September 8, 2005 so right now, i'm powering my SID with two 9v batteries, and the core is running on a 9V PSU. since i can't find any solutions for a PSU at the moment (no money either), i want to build a small circut to power both SID and Core with my 2x9v set up. if it wasn't running at 18v, i would just make some connections to split the supply line straight to the SID and core, but i'm worried about the heat coming from the core regulator. in order to help with this, i'm thinking that building a mini-psu type thing for the 18v to go into, then straight out to the SID, but between the batteries and the core would be a 9v regulator.would this work and be a good idea?
TK. Posted September 11, 2005 Report Posted September 11, 2005 In general you could connect the lower 9V block to the 7805 input, and the combined 18V output to the SID module. Due to the diode bridge, the 7805 will get 9V-2*0.7V = 7.6V, thats perfectly - the 7805 shouldn't get hot with this voltage.Best Regards, Thorsten.
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