1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Junebug Assembly Tips

Discussion in 'Microcontrollers' started by Krumlink, Nov 5, 2007.

  1. blueroomelectronics

    blueroomelectronics Well-Known Member

    Joined:
    Jan 21, 2007
    Messages:
    12,536
    Likes:
    168
    Location:
    Toronto, Canada
    LOL, just watch out for the BS250K.
     
  2. futz

    futz Active Member

    Joined:
    Sep 15, 2007
    Messages:
    2,043
    Likes:
    24
    Location:
    Vancouver, B.C.
    I did that on a programmer I built recently. Got confused with the pinout differences between BS and 2N transistors. There were 4 transistors in the kit, a combination of proper 2N's and substituted BS's. I soldered every one backwards. Clipped em out (sort of one or two at a time as I found the problems) and replaced with new ones and still got 2 backwards. I was kicking myself by then ("Oh man! I've wrecked it!). Finally got them all the right way and it works perfect now. :p

    So if you get one backwards it won't usually hurt anything. It's just the annoyance and time factor. You just have to clip off and throw away the backward transistor, carefully suck the solder and old wire out of the hole and install a new transistor. They're cheap!
     
  3. blueroomelectronics

    blueroomelectronics Well-Known Member

    Joined:
    Jan 21, 2007
    Messages:
    12,536
    Likes:
    168
    Location:
    Toronto, Canada
    The problem with the BS250 is the modified TO-92 case on some versions. I'm trying to source only the BS250K in the future (Goes in the same way as the 2N7000)

    Hmm might be a fun project on the Junebug. Don't solder in the BS250 till the end and I wonder if I could make a tester for it using the three pin socket under the reset button...

    (Preprogrammed 18F1320)
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. mvs sarma

    mvs sarma Well-Known Member

    Joined:
    Oct 29, 2006
    Messages:
    3,512
    Likes:
    76
    Location:
    Hyderabad, India.

    why not try to capture the pinout of various makes and publish a small png to indicate maker wise pinout (top view of course.)It might help many others instead of asking them to get only bs250K version?
     
  6. blueroomelectronics

    blueroomelectronics Well-Known Member

    Joined:
    Jan 21, 2007
    Messages:
    12,536
    Likes:
    168
    Location:
    Toronto, Canada
    I did :) I've drawn them up in the current Junebug Assembly Manual.
     
  7. mvs sarma

    mvs sarma Well-Known Member

    Joined:
    Oct 29, 2006
    Messages:
    3,512
    Likes:
    76
    Location:
    Hyderabad, India.
    Wow, Thanks Bill. In fact I am yet to see the new manual, Sir.
     
  8. blueroomelectronics

    blueroomelectronics Well-Known Member

    Joined:
    Jan 21, 2007
    Messages:
    12,536
    Likes:
    168
    Location:
    Toronto, Canada
    It's free for the download, I update it whenever I have the time.
     
  9. parts-man73

    parts-man73 New Member

    Joined:
    Jan 29, 2008
    Messages:
    46
    Likes:
    0
    Location:
    Endwell, NY
    Success! I finally got a chance to sit down with my soldering iron (busy time of year with kids in sports) I have to commend you Bill, this is a nice kit! The documentation was easy to follow and it worked immediately when plugged into my USB port, MPLAB recognized it and I was able to program the onboard 18F1320.

    I attached a photo of my completed Junebug.

    Time to play!

    Brian
     

    Attached Files:

Share This Page