I have an input DC signal voltage 0V to 6.5V that need to be scale up to DC voltage 0V to 10V. Any advise what type of circuit that I should use?.

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    \$\begingroup\$ How about an opamp with approx. 1.5 times amplification? The setup depends on your signal source and what it is connected to. \$\endgroup\$
    – Dejvid_no1
    Commented Oct 5, 2015 at 8:13
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    \$\begingroup\$ Is this a signal or are you trying to provide 10V power from 6.5V? What power supplies do you have available? \$\endgroup\$ Commented Oct 5, 2015 at 11:14
  • \$\begingroup\$ Hi Olin Lathrop this only a for signal application. \$\endgroup\$
    – Fairus
    Commented Oct 7, 2015 at 5:53

1 Answer 1


An amplifier, with a gain of 1.53 (10/6.5) you can make this using an op-amp IC and a few resistors.

There is a tutorial on using op-amps here.

The circuit you need would be:


simulate this circuit – Schematic created using CircuitLab

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    \$\begingroup\$ This site likes to be standalone and independent as possible. Please consider adding a circuit diagram that shows an opamp design that does what the OP needs. \$\endgroup\$ Commented Oct 5, 2015 at 9:48
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    \$\begingroup\$ How about using values that are actually available in the shop? When looking at E24 values 30 and 56 are closest (0.18%, which is much better than the tolerance of the components which is usually 1 or 2%). When looking at regular E12 resistors 12/22 or 18/33 are closest (both at 0.46% error for components with 5% tolerance). \$\endgroup\$
    – jippie
    Commented Oct 5, 2015 at 15:29
  • \$\begingroup\$ 5.3k can be made from 5.1k and 2 100R values in series. \$\endgroup\$
    – Icy
    Commented Oct 5, 2015 at 21:23
  • \$\begingroup\$ Yeah, but nobody does that in anything resembling production. Insertion cost, board space etc. \$\endgroup\$ Commented Oct 7, 2015 at 4:31
  • \$\begingroup\$ Agreed but using preferred values would not have improved the clarity of the answer \$\endgroup\$
    – Icy
    Commented Oct 7, 2015 at 5:21

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