Hi, do you have easy circuit for me to build to set 5V 3-pin analouge indicator into 12V environment.
Usually i have analog indicator that is parallel to potentiometer running on 5V. But now i have only 12V indicator available. But pot is still 5v design.
I tested 555 voltage doubler circuit, but im not sure how to tweak up the voltage on that design. I need 240% gain.
This circuit should act linear. 12v/5v=2.4x should be the multiply.
if the pot reads 4 volt then the circuit should produce 4/5*12=9.6V
Usually i have analog indicator that is parallel to potentiometer running on 5V. But now i have only 12V indicator available. But pot is still 5v design.
I tested 555 voltage doubler circuit, but im not sure how to tweak up the voltage on that design. I need 240% gain.
This circuit should act linear. 12v/5v=2.4x should be the multiply.
if the pot reads 4 volt then the circuit should produce 4/5*12=9.6V
Using capacitors and analog switches, you could build a "lossless" voltage multiplier (if the load current is zero, of course), but it will necessarily be an integer, 2 or 3, but not 2.4.
The best option is probably to create a sufficiently elevated supply, with a tripler or a quadrupler, and feed an opamp amplifier wired for the 2.4 gain.
Sounds pretty complicated and inelegant.... you should probably take another look at your requirements, there must be a simpler way
The best option is probably to create a sufficiently elevated supply, with a tripler or a quadrupler, and feed an opamp amplifier wired for the 2.4 gain.
Sounds pretty complicated and inelegant.... you should probably take another look at your requirements, there must be a simpler way
That will work great if you have a 15 volt supply for the op-amp.Usualy it is done like this
Mona
I believe the OP stated that he only has 5 volts available
paul
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