12 questions linked to/from Reducing voltage with resistors
17k views

### How to convert 9v to 3.3v and 5v? [duplicate]

I am very new to electronics and hardware. I want to know how can i convert 9v to 5v and 3.3v using only resistors ? Basically, this is what i am trying to do - I want to supply power (3.3v) to an ...
7k views

### I want to have a 9v battery to give a 4.5v - 5v power supply? [duplicate]

I am trying to download a program on to my PIC circuit. As you know the pic isn't supposed to operate with anything larger than 5v. I don't have any access to a battery pack which could hold 3 x AA ...
2k views

### voltage drop alternative to resistor [duplicate]

My application requires me to drop voltage from 12v to 6v or any other lower voltage. I have used resistors but they are not efficient for prolonged use as they tend to heat up and burn my fuse. I ...
2k views

### How to drop 230V AC TO 200V AC [duplicate]

Is there any way to drop 230V AC to 200 V AC by using resistor? I want to drop voltage before applying to a 12 0 12V 500mA transformer. If yes what will be its rating?
1k views

### What is the most efficient way to effect a voltage drop in a dc cct? [duplicate]

I have a 24V supply and need to drop the supply voltage to 19V to power a TV set. The plug pack that powers the TV states the output as 19V and the current at 2.1A I could use a resistor to drop the ...
521 views

### How to reduce dc 5 volt to below 1.5v by add extra load [duplicate]

I have an USB charger with 5V DC output. I want to use this charger to power a 1.2V DC motor. I think about adding an extra load, like a DC bulb, to this circuit, maybe it could reduce the voltage ...
821 views

### How to convert 9v supply to 5v? [duplicate]

I am making half adder circuit for my school project but I saw their datasheet and it says maximum supply volate is 5.25v and I have 9v battery, How do I use it if I want to test my circuit without ...
787 views

### Simple circuit design : USB in | 4v out [duplicate]

After some bad luck with cheap Chinese products, I'm looking to build myself a simple USB "pass-through" e-cigarette. For anyone not familiar with e-cigarette, the idea is very simple : you put ...
1k views

### How to use motor drivers with H-bridge and PWM input, to control direction and speed of DC motors?

I'm running series of experiments using a 6V DC motor. I'm using desktop DC power supply to power the motor and regulate its speed and everything works just fine, the setup has been running for months....
2k views

### 3V power rail from 5V

I've mistakenly ordered some 3V PIC18 L F14K22 instead of the 5V 18F14K22. 3V output is fine for the designed circuit but I need to make a 3V power rail from the available 5V rail. Since only a ...