Products > Test Equipment
Brymen IR connection protocol - Anyone sniffed it yet?
<< < (20/31) > >>
t1d:

--- Quote from: serggio on May 28, 2016, 06:58:57 pm ---
--- Quote from: t1d on May 28, 2016, 06:52:51 pm ---Not voltage, rather, amperage. The controller can only supply 20mA, per pin, if I remember correctly. The SMD IRs seemed to require more than that, if I read the specs correctly.

--- End quote ---
:o
You telling about emitting LED. But you need use it in series with resistor! Resistor for limiting current that consume LED. If your LED have 1,2 V forward voltage for 10 mA, then you need connect resistor in series 5-1,2 = 3,8 V. R=U/I = 3,8/0,01 = 380 Ohm.  :-//

--- End quote ---
There was a discussion of the needed value of the resistor. Because flexibility in the value seemed to be needed, I did not specify the resistor values on the board; I simply provided the pads for whatever resistor might be used. My contribution to the development is really about making a board that will lock into the bracket, without having to make the board from scratch. JadeW will need to address your question, as to the resistor value. You are providing impressive help! Please keep it coming!
serggio:

--- Quote from: t1d on May 28, 2016, 07:15:44 pm ---There was a discussion of the needed value of the resistor. Because flexibility in the value seemed to be needed, I did not specify the resistor values on the board; I simply provided the pads for whatever resistor might be used. My contribution to the development is really about making a board that will lock into the bracket, without having to make the board from scratch. JadeW will need to address your question, as to the resistor value. You are providing impressive help! Please keep it coming!

--- End quote ---
You no need to print components nominal on board. Only name needed.
Newer try projecting board without schematic! You need have complete tested solution first, then you can trace your board according your scheme and place it to production!  ;)
t1d:
Yes, that is the typical method of proper development. From my understanding of the work of the other contributors, the circuit has been tested and was successful.

You may have noticed that I have not released the my Eagle file, yet. That is because I will prove the design, for myself, before offering it to others.

I am having the prototype boards manufactured, because they are so cheap and I have had limited success, with printing my own boards.

Please stay involved and keep me on the right track. I appreciate you!
t1d:
I built a cardboard form to try potting the components on the board in hot glue. It is cooling, now.
Here is what I recommend:
1) Lay out the measurements of the box on thin cardboard; 32mmL x 10mmW x 32mmL x 10mmW. Make the fence high enough to cover the components and their bent leads... Mine is 12mmH. These dimensions will change on the new version of the board.
2) Cut the cardboard, vertically, at the vertical points. Do not cut the horizontals, yet.
3) Cover the cardboard with tape that is resistant to the hot glue... Kapton tape would be good.
4) Cut the horizontal line and remove the fence strip from the remaining cardboard. Do not cut the vertical tape joints.
5) Fold the fence strip into a rectangle with the tape to the inside of the fence.
6) Cover the outside of the fence with tape.
7) Secure the fence to the board. The fence will try to float up and allow glue to ooze out the bottom, if you don't secure it well.
8) Make a heat shield to protect the wiring.
9) Heat a stick of hot glue and fill the cavity. I used a heat gun.
You could use proper potting, or some sort of glue, but I did not want to go to that expense, for prototyping.
I can make a drawing, if the instructions are not clear.

EDIT: Things I learned
- Make a dam, out of aluminum foil, and wrap it around the convex end of the IR components, to close the gap between them and the board, to prevent glue from filling their holes.
- Cover the bottom of the board with tape, to protect that surface.
- Make the fence higher than needed, to accommodate shrinkage, due to the cooling of the hot glue.

I have an extra board, if someone would like to:
- Verify the traces
- Verify the fit in the bracket
- Practice potting
I would be glad to mail it to anyone in the USA/Lower48. Just send me a pm with your mailing address.
Please know that the IR component holes are not exactly in the correct spot, so this is not a functional board.
t1d:
I have ordered the updated boards from OSH Park, as of tonight.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod