I need to make a voltage converter for 0-5v input to 10 -20v output, Vout = (2 x Vin) +10. The input is from an air fuel controller in a car and the output voltage will be read by a panel meter:
3½ 12v Digital Red LED 20V DC Volt panel meter
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=370365501275
http://www.sure-electronics.net/download/ME-PM182_Ver1.0_EN.pdf
I found this voltage doubler circuit posted on here that does most of what I need,
http://forum.allaboutcircuits.com/attachment.php?attachmentid=1038&d=1183542394
Will the above circuit need exactly 12v to work accurately, would it be ok on about 14.5v with the engine running?
I also need a steady 5v supply for the panel meter, could I get that from the above circuit?
Also I need to add the 10v somehow, I may be able to add a digit on the panel meter itself by shorting the led's, the meter will never actually show 20v, it's always going to be somewhere between 10v and 19v.
Where is the best place to source the components, I've found many of them on ebay but individually, is there somewhere I could easily get everything needed from, Maplins?
Thanks
Tom
3½ 12v Digital Red LED 20V DC Volt panel meter
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=370365501275
http://www.sure-electronics.net/download/ME-PM182_Ver1.0_EN.pdf
I found this voltage doubler circuit posted on here that does most of what I need,
http://forum.allaboutcircuits.com/attachment.php?attachmentid=1038&d=1183542394
Will the above circuit need exactly 12v to work accurately, would it be ok on about 14.5v with the engine running?
I also need a steady 5v supply for the panel meter, could I get that from the above circuit?
Also I need to add the 10v somehow, I may be able to add a digit on the panel meter itself by shorting the led's, the meter will never actually show 20v, it's always going to be somewhere between 10v and 19v.
Where is the best place to source the components, I've found many of them on ebay but individually, is there somewhere I could easily get everything needed from, Maplins?
Thanks
Tom