Products > Test Equipment
Brymen IR connection protocol - Anyone sniffed it yet?
t1d:
@ Jadew
1) I was using JesusCF's schematic from post #54, because I thought it was the most recent. I didn't really study it out, but I think you are correct... The TX pin out would be configured to start low, go high when transmitting, through the Resistor and LED and on to ground. Is that correct?
3) I tried a piece of OSH Park board in the bracket. It is slightly too snug. A tiny bit of sanding should make it perfect. But, folks can specify whatever thickness they like, when they order their boards.
t1d:
Here is Rev2 of the board...
1) Changed the IR LED circuit to what I think is correct. Please verify.
2) Added an outline to build a box to house the components. I will likely build the box walls from thin paper board and pot the components, for strength and protection. Then, the box can be removed.
Thoughts? Suggestions?
I have printed the board outline. I hope to cut it out, tomorrow...
t1d:
Well, if I ain't sleep'n, best to just play with the electronic stuff, right?
I cut out the cardboard PCB template. The locking arcs and the length were dead on. The corner offsets were too deep.
So, I have corrected the offsets and used the extra space to expand the box outline. See attached. I will go back through the print, cut, compare process and let you know how it goes...
t1d:
I managed to get the template printed, cut out and fit tested. It looks to be good enough to order a set of boards from OSH Park, for further testing.
It was difficult to determine from the paper template that the holes for the IR LED and Phototransistor are exactly in line with the ports on the DMM. This is about the only item that I am wondering about. So, having the prototype manufactured is necessary to make this final determination.
I picked a fancy, play-on-words name for the board, because that is what all the cool kids do... "LOCKSTEP" This term means to move in mirrored unison, as a marching band would do... The board locks onto the DMM and the DMM and computer move in unison... The name is printed on the bottom of the board...
Here is the OSH Park renderings. Notice that the price for 3 boards is just $4.10/shipped!
serggio:
Probably your IR emmiting/receiving LEDs placed slightly far away each other than in Fluke, then you might use my PCB that I developed for Fluke measuring devices with optoisolated UART connections.
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