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Rotating monitor construction *Project finished*

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bfauska:
I'm looking forward to seeing another implementation of the mechanics involved in this process, each one has some great features, and they usually build on all the versions done prior (Except Cornchip's, most people don't manage to imporve on his system very much.)

Bummer about your mail too, I bet you gave the ebay seller hell, I know I would have, and then I'd find my foot lodged half way down my throat.  Oh, well, at least you can edit any bad feedback and you got your stuff.

DaOld Man:
Yeah, I agree about Cornchips setup.. Its very good.

Fortunately, I had not left feedback for the guy on ebay yet.
He never sent me an email to confirm that I had won, and he never sent me the shipping notice, and he wouldnt answer my emails.
In my last email (sent last Friday), I told him I was going to file a claim if I didnt get the item or hear from him by Tuesday. Im glad I noticed I hadnt received any bills for the month on Monday. Decided to wait and see if the order from him got screwed up by the post office.
I gave him a positive mark, but low mark on communication.
The user name is trendcomp, in case anyone else deals with him (a lot of positive comments).

Now I have 39 optos. (I ordered 6 from All Electronics)
Its always nice to have a few optos in the junk box, so Im happy.

Now I just got to find time to assemble my interface board.
Maybe this weekend..

DaOld Man:
Ok, I got a little bit of work done on the isolator interface last night.
Here is a picture of the pc board with most parts placed on it.
I have 6 TIL119 opto isolators, relay diodes, terminal strips and status leds placed on the board.
In the picture, along the left are terminal strips for the two rotation limit switches, a SPDT auto/manual switch, and two manual rotate buttons.
On the top are two terminal strips for degauss and monitor off relays. (I havent decided yet what I want to do, so Im leaving the door open.)
Directly below those terminals are two surge diodes for the relays.
To the right of that are 4 leds. These will tell me if I am getting the signals from the printer port.
Right down the center are the 6 opto isolators.
To the right of the board are the auto/manual switch I am thinking of using, and a cherry micro switch with a roller on it. I am thinking of using this type switch for my limits.
Cost thus far:
H Drive cost: 20.65

These parts are from Allelectronics.com:
PC Board (Part # PC-4): 2.00
2-Pos. PC teminal block (TER-202) 4 X .45 each: 1.80
3-pos. PC term block (TER-203) 2 X .60 each: 1.20
Shipping : 7.00

Cost of 6 TIL-119 opto isolators: 1.50
(I ordered 33 from ebay with shipping total price = 8.39, so they cost me about .25 each)

Total thus far: $34.15

The switches, diodes, and leds were in my junk box so I dont know what they cost.
It kinda gripes me about allelectronics orders shipping cost, but I aint getting on that soap box again.
I did order more parts with that order, which I may use on this project if I do, I will add the cost of those in later. The shipping is already covered if I do use them.

DaOld Man:
Finished the isolator today.
I originally used 1K resistors to pull the input to ground, but this wasnt enough. I had to go back and solder 2 K ohm resistors in parallel with the 1 Ks. This brought the resistance down to about 670 ohms.
Note to KOZ319: If you can make your program look for an input going low instead of going high, it will make the circuit a lot easier.
Here are some pics..
1st pic is board fully assembled. (Before I added the 2 K resistors).
2nd pic is iso-board with H drive attached (riding piggy back).
3rd pic is isoboard connected to motor and power supply and dos computer.
Now I can start to concentrate on the rotating mechanics.

DaOld Man:
Here is a crude picture of how everything hooks up. (I made this to remind me when I hook this up later. Probably much much later..)

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