off-topic. I need to switch polariti to a coil

[bugler]

Hello,

sorry to post an off-topic but after doing research I can't find what I am looking for.
I want to develop a prototype for one of my ideas (not related to free energy).

I need a silent linear motor so I have thought that maybe the best idea would be to use a coil and by inverting the polarity I can move the core back and forth.

I just know the basis of electronics so I can't do it myself.
Does anyone know if there is a commercial polarity inverter or something similar to what I need (or I think I need)?

Can this be done in any other way available on market?

Thanks.

[Jan H]

what about an alternating current?

hair clippers and doorbells work on this principle.

[bugler]

Thanks for answering.

I need a frequency around 1hz (between 0.5-3hz).

Can I change the frequency of AC?

Thanks.

[lighty]

@Bugler

Google for H-Bridge. It can be done with relays or MOSFETs.

[bugler]

Thanks.

I found this site: Using the H-bridge - H-bridge Tutorial

It seems I have to use a micro controller.

Does anyone know a micro controller kit to create and run the program in the micro controller?

[lighty]

You don't need MCU. The only thing you have to watch out for is the simultaneous switch On of the elements in the same vertical arrangement (you would get a true short circuit which could cause some damage to the circuitry. So you have to introduce delay circuit.

For the fast solution I would use a Flip-Flop to provide me with two phase opposed signals and then use H-Bridge Driver IC. Or even better yet you can omit Flip-flop part if a H-Bridge driver IC has advanced enough logic. In the past I used one of the HIP408x series (don't remember which one) and I think TD340 to drive high power MOSFETs and to control rotation of the motor with currents over 40A. However most of the semiconductor manufacturers have at least one H-Bridge driver in their offer so, google for H-Bridge Driver and good luck.