Building a handheld device [engineers help]


#1

Hello,

I want to build a handheld electrical device. I have very little knowledge when it comes to electrical components, so that is why I am creating this thread.

The device I want to build is based on magnets.

I want to build handheld electromagnet pulse generator or switcher (what is the correct word?)

Basically, I want to connect battery/DC adapter powered electromagnet to a switching circuit. The circuit switches ON/OFF the electromagnet X number of times. The user should be able to set the switching frequency whether 100 times par minute or 10,000 per minute etc.

Also, it would help if I am able to adjust the power of electromagnet as well.

What kind of magnet, batteries and circuit, IC’s transistors etc. would be required for this project?

thanks!


#2

What’s the purpose of this device?


#3

It would help greatly to give you some good suggestions if you can explain what is the purpose of such a device.

What level of magnetic strength you need ? Size ? Geometry ?


#4

This device will be used for medical/massage purpose.

A small 1 inch round magnet would do just fine.

i want to add red lights (635nm) to it for light therapy

Also: is it possible to switch polarities of an electromagnet by changing current direction etc?


#5

Kinda vibrator ? Why not use a motor with a lobe ?

Yes, the polarity of a magnet can be reversed by reversing the DC current. If the input is AC, changing wires will have no effect as the polarity is already changing due to being AC.


#6

No. It will not use vibration.

The device will use magnetic fields (north) for therapy to cellular level.

Electromagnet > magnetic pulse (x times switching per minute > application on skin/affected area