# Capacitor and resistor unknown to use

#### ItalianMikrNC

Joined Dec 30, 2019
5
Hello I help help in knowing what size Capacitor and resistor will work best in my 3 volt circuit, that draws 1.5volts. I would like to keep constant loan voltage of 1.5volts under a load, from 3 volt batteries.
Just need to know the size of capacitor and resistors that could work. Thanks

#### Dodgydave

Joined Jun 22, 2012
9,319
The capacitors can be be any value from 10uF to 1000uF @5 V or higher,, ideally we need to know what you are planning on using on the battery, like leds, bulbs, etc how much current you're looking at??

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#### ItalianMikrNC

Joined Dec 30, 2019
5
The load will be coming from a constant led light flash light and the vault of it will be pulled will be 1.5 v

#### ItalianMikrNC

Joined Dec 30, 2019
5
The capacitors can be be any value from 10Uf to 1000uF @5 V or higher,, ideally we need to know what you are planning on using on the battery, like leds, bulbs, etc how much current you're looking at??
Hello thanks for the help on the capacitor, would size resistor to you recommend for this 1.5v-5v circuit?

#### MrChips

Joined Oct 2, 2009
21,685
How much current will the load draw at 1.5V?

A simple solution is to use two 1N4001 diodes in series with your load.

#### ItalianMikrNC

Joined Dec 30, 2019
5
How much current will the load draw at 1.5V?

A simple solution is to use two 1N4001 diodes in series with your load.
Ok thank you, I believe my load pull will be 1.5volts, it’s a typical flashlight

#### dl324

Joined Mar 30, 2015
11,317
hat size Capacitor and resistor will work best in my 3 volt circuit, that draws 1.5volts. I would like to keep constant loan voltage of 1.5volts under a load, from 3 volt batteries.
What is the load? Can you clarify what you mean by the circuit draws 1.5V?

#### MrChips

Joined Oct 2, 2009
21,685
Ok thank you, I believe my load pull will be 1.5volts, it’s a typical flashlight
If it is a flashlight bulb, read what is written on the side of the bulb. It should state the voltage and current.

#### ItalianMikrNC

Joined Dec 30, 2019
5
What is the load? Can you clarify what you mean by the circuit draws 1.5V?