Ghost_Dog Posted October 2, 2006 Report Share Posted October 2, 2006 Hi, do i need a psu or is the one of the core module enough and i only need a transformer? How many VA does it need to have ? Quote Link to comment Share on other sites More sharing options...
moxi Posted October 2, 2006 Report Share Posted October 2, 2006 hi,you need a 2*12V PSU to power the Aout module. Quote Link to comment Share on other sites More sharing options...
Ghost_Dog Posted October 7, 2006 Author Report Share Posted October 7, 2006 thanksso for the core-module, a 9V, 556mA transformer is ok, and for the aout_lcs ( http://ucapps.de/mbhp/mbhp_opl3_psu.pdf ) i need 2*12V with at least 100mA per wiring, right?by the way do you know whether there's a reason the resistors are coal-types? because as far as i can see metal-film types are both better and cheaper... Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 10, 2006 Report Share Posted October 10, 2006 The 1% tolerance resistors you would want are usually more expensive.... Maybe you found a good deal :)The cheaper resistors are 5% and they're not really accurate enough for the aout module... Quote Link to comment Share on other sites More sharing options...
Ghost_Dog Posted October 10, 2006 Author Report Share Posted October 10, 2006 thanks, i wish i had, it's just reichelt has stupidly increased the prices for the 5% ones from i think 2c to 10c per unit :-\i was still tiping the order for the core, but i thought it would be stupid to pay more for lesser quality ones if there was no reason...for the aout i will get some bags of 100 resistors from conrad and measure...by the way, is it the exact value that counts or the fact they are as near as possible to one another ? Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 10, 2006 Report Share Posted October 10, 2006 by the way, is it the exact value that counts or the fact they are as near as possible to one another ?Both in this case... The value will control the range of voltages output, and the tolerance the accuracy of the different levels. Quote Link to comment Share on other sites More sharing options...
SLP Posted October 10, 2006 Report Share Posted October 10, 2006 for the aout i will get some bags of 100 resistors from conrad and measure...try www.pollin.dethey're cheaper than reichelt and conrad. Quote Link to comment Share on other sites More sharing options...
Ghost_Dog Posted October 10, 2006 Author Report Share Posted October 10, 2006 thanks :)i didn't find normal 1% resistors at pollin. in this particular case conrad seems to be the cheapest one, you pay 1,76 for a package of a hundred resistors, and i think i'll take 10 of them to be able to choose (unless it's stupid to take so many for 4 aout_lc bords), so it will be 1,56 per pack. i'll probably also take precison trimmers instead of the normal ones.EDIT:i just thought: it probably is _very_ stupid to take so many, for the hours it would take to go through them... Quote Link to comment Share on other sites More sharing options...
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