Shop OBEX P1 Docs P2 Docs Learn Events
General Purpose Controller Board — Parallax Forums

General Purpose Controller Board

stamptrolstamptrol Posts: 1,731
edited 2006-11-29 01:57 in Robotics
·· Hello all,

··· Just got a new controller board built and tested!

··· Uses any of the 24-pin Stamps (BS2, BS2sx, etc). Has 7 opto isolated inputs, 7 outputs with both relays (1 A) and transistor (ULN2003) selectable by jumper.

··· Two Stamp pins are brought out directly for easy connection to other TTL devices.
···
····Built-in 7805 regulator and auto-reset fuse.

·· ·All inputs and outputs have LEDS for indication; 5 volt bus is also indicated with LEDS;
···
··· All terminal blocks are detachable without tools. The terms for the relays are offset so each relay's terms can be removed without disturbing the others.

··· This was my first project using ExpressPCB and the service was great.

··· Cheers

···


▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Tom Sisk

http://www.siskconsult.com
HPIM0636.JPG
2304 x 1728 - 889K

Comments

  • MacGeek117MacGeek117 Posts: 747
    edited 2006-10-23 16:42
    Good job! I like it!
    RoboGeek

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "I reject your reality and subsitute my own!"

    Adam Savage, Mythbusters
    www.parallax.com
    www.goldmine-elec.com
    www.expresspcb.com
    www.startrek.com
    ·
  • Ken GraceyKen Gracey Posts: 7,392
    edited 2006-10-23 21:36
    Tom,

    You've made many versions of your relay boards, and this one looks really clean. You're making a lot of progress. Did you also use ExpressPCB for design, or another tool like Eagle?

    Ken Gracey
    Parallax, Inc.
  • stamptrolstamptrol Posts: 1,731
    edited 2006-10-24 01:10
    Hi Ken,

    Yes, even though the original board got into about 500 project locations, it was still trying to provide too much flexibility.

    This one has about 85% of the flexibility of the original but is cheaper to produce. You've seen version #1. The projects I've done over the years have used version 2. This will be the 3rd generation (even though its called EnT-2).

    I used the ExpressPCB schematic and PCB software to produce the layouts. Then, I used the Pulsar toner transfer system to produce a working prototype. Knowing that the board would work, I sent it through to ExpressPCB online on a Thursday and got the first batch of boards back here on the east coast in under a week. When I think back at all the time spent frigging with local job shops and individual parts suppliers, this was a breeze!

    Let me know if you want to have a closer look.

    Regards

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • steve_bsteve_b Posts: 1,563
    edited 2006-10-24 13:08
    I like it. certainly looks clean.
    I haven't seen those interconnect modules before (almost look like lego!).

    ...granted, this may increase production costs, but these days I pretty well always use sockets for my IC's. Have ruined the odd trace trying to desolder 40pin IC's.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    ·

    Steve

    "Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
  • stamptrolstamptrol Posts: 1,731
    edited 2006-10-24 14:21
    steve_b,

    The terminals are by OST, have a look in the Digikey catalog. Really nice to use, but only come in 5mm flavor so are best suited to custom boards and not 0.1" perfboards.

    Very observant re the chips.......couldn't wait for the socket order to show up!

    Tom

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • RDL2004RDL2004 Posts: 2,554
    edited 2006-10-25 04:42
    You can find those terminal blocks in 5.08 mm (0.2 inch) pitch and in smaller 2.54 mm (0.1 inch) spacing also.

    These sizes fit perfboards exactly. It's also nice how they interlock.

    Buy a bunch of 2 and 3 position and clip them together to make any size you want.

    I love them, I never solder connecting wires to pc boards anymore.

    It makes things much so much easier to disassemble.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    - Rick
  • stamptrolstamptrol Posts: 1,731
    edited 2006-10-25 12:12
    Rick
    Agreed, there are lots of solder-in terminal blocks in both 5mm and 5.08mm, etc. These OST are nice because what gets soldered into the board is sort of a pin header which the block itself is pushed down onto (in both horizontal and vertical orientations).

    Compared to other detachables, these are the most useful and cost effective I've found in the 10A sizes.

    Cheers

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • OzStampOzStamp Posts: 377
    edited 2006-11-29 01:29
    Hi Tom.

    Nice card..
    The inputs are opto isolated great .. what voltage ?? can they take 24VDC in ..??

    PM me if you wish

    Ronald Nollet
    Parallax Australia distributor
  • stamptrolstamptrol Posts: 1,731
    edited 2006-11-29 01:57
    Hi Ron,
    Good to hear from you again. Still using your proto-type board from 6 or 7 years ago.

    The inputs on the board are designed to be active low. For general use, these are referenced to the 5 volts on the board. For real isolation, a jumper is used to allow the external side to be completely isolated, in which case 24 volts can be used.

    Cheers,

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
Sign In or Register to comment.