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Groundloop · April 09, 2011, 12:19:28 PM

Jesus,

Here is a variant using a mosfet transistor. The mosfet gate needs
to be feed pulses from a 555 IC running at 12VDC. The frequency of the 555
must be set so that the electrolytic capacitor never goes above 90 volt.

Groundloop.

Groundloop · April 09, 2011, 01:42:10 PM

Jesus,

And finally, just using a voltage matching Ferrite transformer to get
the voltage down before feeding back to battery.

Groundloop.

nievesoliveras · April 09, 2011, 04:53:27 PM

Thank you @groundloop!

The rearrangement of the LT ic to the left allows to play with different circuits on the right side. Excellent!!!

I have tried many diferent variations with this circuit. I added a stepdown transformer once and the battery did not charge.

But I did not use an scr circuit or mosfet.
Just to not let something unfinished I will post the whole microcontroller circuit, maybe somebody can make it work, including myself.

Jesus

Groundloop · April 09, 2011, 05:17:59 PM

Quote from: nievesoliveras on April 09, 2011, 04:53:27 PM
Thank you @groundloop!

The rearrangement of the LT ic to the left allows to play with different circuits on the right side. Excellent!!!

I have tried many diferent variations with this circuit. I added a stepdown transformer once and the battery did not charge.

But I did not use an scr circuit or mosfet.
Just to not let something unfinished I will post the whole microcontroller circuit, maybe somebody can make it work, including myself.

Jesus

Jesus,

Attached is software for the PIC16F88 to run two switches. It is very easy to change the software by
using MPLAB form: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en019469&part=SW007002

Groundloop.

nievesoliveras · April 09, 2011, 05:27:26 PM

Quote from: Groundloop on April 09, 2011, 05:17:59 PM
Jesus,

Attached is software for the PIC16F88 to run two switches. It is very easy to change the software by
using MPLAB form: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en019469&part=SW007002

Groundloop.

Thank you @groundloop!!!

By the way I bought last year among other boards, a Pickit2 from Microchip. I just have to give it more study time. I find very dificult the assembly programming language used.

Jesus