RF design for remote strobe firing - Electronic Circuits Projects Diagrams Free

Mike Lewis · 14th June 2007, 05:02 AM

Hi,
I have a working design using a Linx keyfob transmitter and a Linx LR series
Receiver module with MS series decoder design module.
I use a tl106 SCR to fire the external flash units. Everything works fine except
the flash only syncs at 1/25th sec I need at lest 1/125 sec what can I do to achieve that. If necessary I am willing to go with a Pic to get the best
result if no inprovements can be made on the current design.
Thank You
Mike Lewis

HarveyH42 · 14th June 2007, 05:31 AM

Sorry, but it's not too clear what you have, or what you are trying to accomplish, other than you want to cut the delay in half. You'll need to provide much greater detail if you want help refining this.

Mike Lewis · 14th June 2007, 03:07 PM

To get a better understanding I have included my circuit diagrams.
This should give you a better idea.
Thank You
Mike Lewis

Rolf · 14th June 2007, 03:37 PM

Quote:

Originally Posted by Mike Lewis

To get a better understanding I have included my circuit diagrams.
This should give you a better idea.
Thank You
Mike Lewis

The coding and decoding delay might be what is casing the problem. You need to do some investigation with an oscilloscope to find out how much it is.

Good Luck!

Rolf

Mike Lewis · 14th June 2007, 03:43 PM

Hi,
Thank You
You are right the coding and decoding is eating up about 20ms
Is there a way around it?
Mike

Rolf · 14th June 2007, 03:59 PM

Quote:

Originally Posted by Mike Lewis

Hi,
Thank You
You are right the coding and decoding is eating up about 20ms
Is there a way around it?
Mike

Use RF without coding. Like this: http://www.pbase.com/sinoline/rf_rem...ntrol_for_d7xx

Check for Private Message, upper right hand corner.

Rolf

mneary · 14th June 2007, 09:16 PM

Increase your baud rate. Right now you're using 9600; the chip set can go to 28,800 by connecting both baud signals to "1".

Rolf · 15th June 2007, 02:51 PM

Quote:

Originally Posted by mneary

Increase your baud rate. Right now you're using 9600; the chip set can go to 28,800 by connecting both baud signals to "1".

Well, did it take care of your delay problem?

Mike Lewis · 16th June 2007, 01:28 PM

It was a little difficult to make the changes, but when made It never
Worked. I am doing a little more research and may take a different
approach. I will have to order a few parts to make changes.
I will post the changes and results when made.
Mike

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14th June 2007, 05:02 AM	(permalink)
Mike Lewis	RF design for remote strobe firing Hi, I have a working design using a Linx keyfob transmitter and a Linx LR series Receiver module with MS series decoder design module. I use a tl106 SCR to fire the external flash units. Everything works fine except the flash only syncs at 1/25th sec I need at lest 1/125 sec what can I do to achieve that. If necessary I am willing to go with a Pic to get the best result if no inprovements can be made on the current design. Thank You Mike Lewis

14th June 2007, 05:31 AM	(permalink)
HarveyH42	Sorry, but it's not too clear what you have, or what you are trying to accomplish, other than you want to cut the delay in half. You'll need to provide much greater detail if you want help refining this.

14th June 2007, 03:43 PM	(permalink)
Mike Lewis	Hi, Thank You You are right the coding and decoding is eating up about 20ms Is there a way around it? Mike

14th June 2007, 09:16 PM	(permalink)
mneary	Increase your baud rate. Right now you're using 9600; the chip set can go to 28,800 by connecting both baud signals to "1".

16th June 2007, 01:28 PM	(permalink)
Mike Lewis	It was a little difficult to make the changes, but when made It never Worked. I am doing a little more research and may take a different approach. I will have to order a few parts to make changes. I will post the changes and results when made. Mike