Guest KJH Posted July 25, 2003 Report Share Posted July 25, 2003 HiAlmost finished building the SID, reading the documentation suggests I need a 15v 500mA power supply which seems quite high as the 8580 only requires 9 volts. Is there any benefits in driving it so hard?CheersKJH Quote Link to comment Share on other sites More sharing options...
smashtv Posted July 25, 2003 Report Share Posted July 25, 2003 HiAlmost finished building the SID, reading the documentation suggests I need a 15v 500mA power supply which seems quite high as the 8580 only requires 9 volts. Is there any benefits in driving it so hard?CheersKJHHeya KJH!The SID chip is not directly driven from the 15v input, it is regulated to 9v by the voltage regulator. Keep in mind that some parts will change depending on what SID chip you have:8580: 7809 voltage regulator, C1/C2 = 6.8nF6581: 7812 voltage regulator, C1/C2 = 470pFHave Fun!Smash Quote Link to comment Share on other sites More sharing options...
pay_c Posted July 25, 2003 Report Share Posted July 25, 2003 Yes, and since you regulate down to 9V, you can also use a 12V supply (500mA).The 7809 (or other 780... types) always need at least 2V - 2,5V more supply voltage than they´re regulating to. Quote Link to comment Share on other sites More sharing options...
LO Posted July 27, 2003 Report Share Posted July 27, 2003 use 15v if you want a clean sound (its what TK recommends!) Quote Link to comment Share on other sites More sharing options...
TK. Posted July 28, 2003 Report Share Posted July 28, 2003 Hi LO,15V at SID::J1 are recommented for the 658112V at SID::J1 for the 8580in a mixed setup use 15V for bothBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
LO Posted July 28, 2003 Report Share Posted July 28, 2003 That makes sense!Hope I didnt no-body wrong!peaceLO Quote Link to comment Share on other sites More sharing options...
Guest KJH Posted July 30, 2003 Report Share Posted July 30, 2003 thanks for the replies. 12v supply it is then, 15v supplies are more expensive in the UK anyway!I worded my question wrongly! I meant driving the regulator so hard, not the SID. Are there any heat dissapation problems with the regulators using the higher voltage?I hadnt noticed that the SID Pages had been updated and clearly mentioned the 12v Supply for the 8580. I had printed out the pages last year and hadnt been back.......all I can say is, Thorsten, you've been busy!!!Cheers allKJH Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.