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Author Topic: Feedback To Source  (Read 349675 times)

Offline Groundloop

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Re: Feedback To Source
« Reply #720 on: April 09, 2011, 03:49:02 AM »
@groundloop

I do not understand the arrow going from A to B on the schematic.
If it is another relay that goes there. Why use more than one relay?

Jesus

Jesus,

The relay drawing is there to explain how the A, B and C connector output will behave when
the correct pulsing is done from the micro controller (implemented in software). The two ICs
to the right in the drawing is single contact electronic relays that in my drawing is connected
together to form a switching relay function as shown. Please look at the data sheets for
the ICs to understand how they work. I posted this drawing to show that in some cases we can
use electronic switching that are ready made and easy to implement. The ICs has the same
function as opto-couplers with a input LED to control the output mosfet transistors.

Groundloop.

Offline nievesoliveras

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Re: Feedback To Source
« Reply #721 on: April 09, 2011, 01:27:43 PM »
Jesus,

The relay drawing is there to explain how the A, B and C connector output will behave when
the correct pulsing is done from the micro controller (implemented in software). The two ICs
to the right in the drawing is single contact electronic relays that in my drawing is connected
together to form a switching relay function as shown. Please look at the data sheets for
the ICs to understand how they work. I posted this drawing to show that in some cases we can
use electronic switching that are ready made and easy to implement. The ICs has the same
function as opto-couplers with a input LED to control the output mosfet transistors.

Groundloop.
I will read the data sheets. But I still have questions about the circuit perse.

The output marked A, is it positive?
Are there two different output signals on B and C?

If there are two signals, then, the two separate relays inputs to be relayed must be connected to the charging diode, at least this time?

Do you have the code that suppose to run that circuit?

Forgive me for asking so many questions. But even though I can draw a circuit, I am a newbie on microcontrollers.

Jesus

Offline nievesoliveras

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Re: Feedback To Source
« Reply #722 on: April 09, 2011, 03:07:09 PM »
This is how I understand it will work:

Jesus

Offline Groundloop

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Re: Feedback To Source
« Reply #723 on: April 09, 2011, 05:33:43 PM »
This is how I understand it will work:

Jesus

Jesus,

May I suggest this circuit instead, since you have little experience with micro controllers.
I have not build this circuit, but I think it will work in your setup. The feed back part will only
work with the TIC106D SCR or any low trigger current SCR.

Groundloop.

Offline Groundloop

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Re: Feedback To Source
« Reply #724 on: April 09, 2011, 06:05:05 PM »
Jesus,

Here is a variant using a electronic relay. The relay is a opto-coupler with a LED inside
and needs to be feed pulses from a 555 IC running at 12VDC. The frequency of the 555
must be set so that the capacitor never goes above 55 volt.

Groundloop.

Offline Groundloop

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Re: Feedback To Source
« Reply #725 on: April 09, 2011, 06:19:28 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.

Offline Groundloop

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Re: Feedback To Source
« Reply #726 on: April 09, 2011, 07:42:10 PM »
Jesus,

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

Groundloop.

Offline nievesoliveras

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Re: Feedback To Source
« Reply #727 on: April 09, 2011, 10:53:27 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

Offline Groundloop

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Re: Feedback To Source
« Reply #728 on: April 09, 2011, 11:17:59 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.

Offline nievesoliveras

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Re: Feedback To Source
« Reply #729 on: April 09, 2011, 11:27:26 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

Offline Groundloop

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Re: Feedback To Source
« Reply #730 on: April 09, 2011, 11:38:41 PM »
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

Jesus,

Yes, assembly programming may look difficult at first. But after a while you will learn to love it because
you have full control of the code and the code will be very compact and fast. And as the time goes by you
will have many subroutines that solve different problems so you will start copy/paste those. There is also
many code examples to be found on the web. Download the PIC16F88 data sheet and you will be amazed
on the things you can do with a micro controller. Start out easy, get some LEDs to blink and go from there.

Groundloop.

Offline nievesoliveras

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Re: Feedback To Source
« Reply #731 on: April 12, 2011, 02:58:48 AM »
Thank you @groundloop!

Do you have for sale an already made board with the pic16f88 already on it?

****************************
This are most of the parts needed for all the experiments:

Newman Motor
PVC Pipe 3 to 4" Diameter
Bearings
Threaded bolt 1/4"
Security nuts
Big Magnets
Epoxy
30 to 26awg wire
Enamel paint
Plywood board

Protoboard
Tip31A
Led
100ohm
Neon
2200uf electrolitic

LT1073-12
1N5818
47uf electrolitic
120uh Inductor

0.1 to 0.47uf ceramic
100 to 10,000uf electrolitic
100 Turns of 0.45mm and ferrite

Ferrite toroid transformer - 100:1
Ferrite toroid transformer - 60:1
Ferrite toroid transformer - 43:1
Ferrite toroid transformer - 36:1
1n4007   

Velleman flip flop kit
AN28 Opto Isolator
NPN Transistor

Pic16F88 Microcotroller
Board with 32Mhz Xtal
7805 regulator or 5v power supply kit
AQV252G Solid state relay
2N2904 NPN Transistor
555 IC

10uf 100v Electrolitic
Neon bulb
10ohm
1kohm Resistor
2kohm
T106D Scr
IRF510 Mosfet

0.68uf 250v Mylar

Jesus

Offline Groundloop

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Re: Feedback To Source
« Reply #732 on: April 12, 2011, 06:55:06 AM »
Thank you @groundloop!

Do you have for sale an already made board with the pic16f88 already on it?

****************************
This are most of the parts needed for all the experiments:

Newman Motor
PVC Pipe 3 to 4" Diameter
Bearings
Threaded bolt 1/4"
Security nuts
Big Magnets
Epoxy
30 to 26awg wire
Enamel paint
Plywood board

Protoboard
Tip31A
Led
100ohm
Neon
2200uf electrolitic

LT1073-12
1N5818
47uf electrolitic
120uh Inductor

0.1 to 0.47uf ceramic
100 to 10,000uf electrolitic
100 Turns of 0.45mm and ferrite

Ferrite toroid transformer - 100:1
Ferrite toroid transformer - 60:1
Ferrite toroid transformer - 43:1
Ferrite toroid transformer - 36:1
1n4007   

Velleman flip flop kit
AN28 Opto Isolator
NPN Transistor

Pic16F88 Microcotroller
Board with 32Mhz Xtal
7805 regulator or 5v power supply kit
AQV252G Solid state relay
2N2904 NPN Transistor
555 IC

10uf 100v Electrolitic
Neon bulb
10ohm
1kohm Resistor
2kohm
T106D Scr
IRF510 Mosfet

0.68uf 250v Mylar

Jesus

Jesus,

Let me first say a couple of words about the Ferrite toroid transformer. That one you can
wind yourself. I do not think you can expect to find ready made transformers that will fit
the specifications you need.

I do not sell anything, sorry. But I have a prototype board I can send you for free. :-)

Just PM me a snail mail address and I will send this board to you. I reckon you are able
to solder? You can find a 32KHz crystal on an old computer boards. It is a small round tube with
two wires located around the computer board back up clk battery. Attached is a image on how
that crystal looks like. So if I send you the board then you will need to unsolder the 16MHz crystal
and solder in the new 32KHz crystal to the correct pins together with two ceramic capacitors.

But before you do that, use the board as it is! Learn how to program the PIC16F88. Then later on you
can change the crystal if you wish. The prototype board will run fine from a 9 volt battery. It has a LED
on it that are fine for testing. It also have a RS232 serial D-sub connector for communicating with a PC.

I can help you with the assembler code to get you going but don't expect a life long support. LOL

Attached is the circuit drawing for this board. The board has two edge connectors, one is for the 9 volt
battery, the other is two outputs for controlling stuff. The output is 0 or 5 volt at max 20mA. So it is
enough to control opto-couplers etc. The RS232 uses a strait serial cable between the card and the
comport on a PC.

I will load the PIC16F88 with a program before shipping to help you on the way. This program will
communicate with a PC and will allow you to switch the outputs on and off by menu choice. This
program will be the starting point for you to learn how to program the micro controller.

But give me a couple of days to write that program, OK?

Groundloop.

Offline nievesoliveras

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Re: Feedback To Source
« Reply #733 on: April 12, 2011, 01:11:59 PM »
Thank you @groundloop!!!!!

I will pm you my snail mail.

Jesus

Offline Groundloop

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Re: Feedback To Source
« Reply #734 on: April 12, 2011, 07:34:21 PM »
Thank you @groundloop!!!!!

I will pm you my snail mail.

Jesus

Jesus,

Today I found a 32KHz crystal and has soldered it to the prototype board.
So now you can select from software if to run from the 16MHz crystal
or from 32KHz crystal. I will write some software to test both crystals.
Will make the software soon and test on the board and then ship it to you.

GL.