How to ... transform DC to AC?

[UTiLeeTY]

You want two 12v pulses, one when the sine tops and the other when the sine bottoms is that correct?

So you want to synchronize your output pulses with your input signal is that correct?

okay i get it you have AC signal to start with.
You want two 12v pulses, one when the sine tops and the other when the sine bottoms is that correct?

So you want to synchronize your output pulses with your input signal is that correct?

Yes ,

exactly, it should run like that:

there you do have 2 (rectified AC) coils for switch input, one attached to NPN and another goes into PNP transistor, 12 VDC battery and couple resistors.

Then, if 1st AC coil gives an impulse (on/off) to NPN -> (+/-)12VDC pulse is active 
           if 2nd AC coil gives an impulse (on/off) to PNP -> (-/+) 12VDC pulse is active

That way one can modulate an AC depending on active or inactive AC coil pulses.

I just dont know how to connect them properly >_<, hope you can help .

Best wishes,

UTiLeeTY

[UTiLeeTY]

If you decide to go with NPN and PNP you just turn around the diode so the target gate threshold pin get's a negative or a positive pulse.
Also be careful not to burn out your components because when a trigger winding is placed next to the output coil it will quickly destroy itself.

May I ask for a circuit diagramm, please ?

Edit: What would happen, if I simply connect 2 (rectified via diodes in 1 direction OR without diodes?) wires of a coil to the base of NPN transistor (as an positive input going through/no diode & connected to the base -> then outgoing wire of same coil from the base of NPN through/no diode to negative pole of a coil :O )?

Many Thanks,

UTiLeeTY

[UTiLeeTY]

Hello again ,


that one is what I was looking for \ 0 / :

http://www.falstad.com/circuit/e-mosfollower.html

Thanks for epic links :thumbsup.

Now my questions:
- how may I even out -VAC and +VAC in that circuit (say -7V & +7V, sine wave)?

- is there a chance to build the same using NPN and PNP transistors?

Many Thanks  ,

UTiLeeTY

[Rafael Ti]

Hi UTiLeeTY
Maybe u need a simple AC emitter follower? There are two types of this setup; with single supply voltage or with two supplies +Ucc and -Uee.

[UTiLeeTY]

Hi UTiLeeTY
Maybe u need a simple AC emitter follower? There are two types of this setup; with single supply voltage or with two supplies +Ucc and -Uee.

Thank you for circuit, need to try that out later .

Well, ... which one would you prefer for switching duty in your circuits:

Hall effect sensor

OR

Reed switch?

Like before, I plan to use my circuits under maximum 12VDC and 1A load
at frequency ... < 500Hz.

Thank you very much .

UTiLeeTY