Apr 5, 2007 #1 K k1_zav Junior Member level 2 Joined Mar 13, 2005 Messages 23 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Activity points 1,460 Hi there. I have ±12 volt and I want ±5 volt. What is the best way to have this voltage? thanks.
Apr 6, 2007 #2 I IanP Advanced Member level 7 Joined Oct 5, 2004 Messages 7,929 Helped 2,311 Reputation 4,624 Reaction score 531 Trophy points 1,393 Location West Coast Activity points 66,416 Depending on how much current do you need, you can use linear +/-5V voltage regulators: 7805 (78L05 for <100mA) and 7905 (79L05 for <100mA) .. Next option is 2 resistors and 2 5.1V zener diodes .. Another option is DC-DC converters .. And so on .. See theses websites for more options: http://www.cpemma.co.uk/diodes.html http://www.cpemma.co.uk/reg.html http://www.cpemma.co.uk/ef.html http://www.cpemma.co.uk/pwm.html Regards, IanP
Depending on how much current do you need, you can use linear +/-5V voltage regulators: 7805 (78L05 for <100mA) and 7905 (79L05 for <100mA) .. Next option is 2 resistors and 2 5.1V zener diodes .. Another option is DC-DC converters .. And so on .. See theses websites for more options: http://www.cpemma.co.uk/diodes.html http://www.cpemma.co.uk/reg.html http://www.cpemma.co.uk/ef.html http://www.cpemma.co.uk/pwm.html Regards, IanP
Apr 6, 2007 #3 K k1_zav Junior Member level 2 Joined Mar 13, 2005 Messages 23 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Activity points 1,460 So you mean these will work with -12 to -5? My problem is to convert negative voltage.