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Beginner Question - Providing 4.5v to a circuit

Discussion in 'General Electronics Discussion' started by shags_j, Jul 31, 2009.

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  1. shags_j


    Jul 31, 2009
    HI All,

    Been playing around with projects etc. and always used 3v (in the way of 2 AA battery clip). However this new one requires 4.5v. What is a good way to get this kind of power?

    Size is also an issue as I would like to package the circuit in a small container as a present for my nephew. Are button cells usable? Maybe hooking up 3 AAA's (never done this before, have always used the jaycar battery clips and they are only 2 or 4 batteries providing either not enough or too much voltage).

    Help greatly appreciated.


  2. amdNRA


    Sep 3, 2009
    Three 1.5vdc batteries in series would add up to 4.5vdc. Button cells usable? Well, it depends on the current draw...Check the datasheets for the cells and compare it against the measured current for the project. or Use a 5volt supply with a silicon diode such as the 1N4001 in series to drop the voltage to about 4.5vdc.
    Later, Gil. :)
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