conversion of variable dc voltage to amplified fixed dc voltage

[mutthuraj]

hi.,

i have a variable dc voltage of about 0 to 2v… i want to make it constant voltage of about 5v.

so can any one give me the idea or circuit to convert variable dc voltage into amplified constant dc voltage…..please…….

[mutthuraj]

please give me the idea or circuit to convert variable dc voltage into amplified constant dc voltage…….

[AJISH ALFRED]

You need voltage multiplier. Refer the following circuit. I haven’t tried it on 2 volts, but I hope it will work if you use germanium diodes.

I assume that you have 2 volts in the form of varying sine wave. If it is so you will get 8 volts at the output. Now use a 7805 regulator to make it stable at 5 volt

 

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Give it a try and please update the result.

[kaylie scott]

I’m not good at it. But, I guess the electrician can make it.

[mutthuraj]

sir…………..thanks for giving such wonderful idea about ckt …

 

 sir….what are the values for capacitors …

values like 0.47uf, 0.01uf …………are suitable for that circuit…..?

 

 

[AJISH ALFRED]

use maximum available values, like 100mfd or even 1000 mfd.

[AJISH ALFRED]

Hi Muthuraj,

After Marcel’s post I checked your question again, actually I made a mistake while reading your post. I thought you need a 0-2 V volt ac to 5 V dc. The circuit which I’ve post will work only on alternating voltages.

[Author]

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