Wednesday, January 30, 2008

Breadboard Adapter

Breadboard Adapter


Materials: PCB, 1 dual-row socket, two 80 pin 0.1" headers.
DISCLAIMERS: 
OUR BREADBOARD ADAPTERS WERE PRINTED TOO WIDE (so we have to trim them by hand)
THE BOTTOM SIDE OF THE BOARD WAS PRINTED BACKWARDS (so the large VCC and GND connections at top are not going to be any use to us)

1.  Cut the pieces to the right sizes, as shown in photo on the right.  Cut 0.1" headers to be 23 pins long, and cut the double socket to be 20 pins long.  Please be very careful cutting these pieces—you can use your wire clippers, but squeeze very slowly and gently, so that you do not get a bad/ugly break on the socket.  Since the socket is extra long, you could try a few practice cuts before doing the real one.  
Cut the breadboard as well (even though my pictures don't show this) this will save you trouble later!
2. Position the socket on the top side of the board (the side with text), and solder it on the bottom.  Solder the corners first, to secure the socket flush with the board, and then fill in the rows of connections.


3. Place the two single row headers on the board, inserting them from the bottom (first picture), and soldering them on the top side (second picture).


Your breadboard adapter is now ready to be used.

4. Stick the adapter in the breadboard so it spans the central gap in the board.  One row of pins should go into the left half of the board (columns A-E below), and the other row of pins should go into the other half (F-J).
4b. Wire up the power as well, with a red wire from VCC (in the middle of the board) to +, and a black wire from GND (in the middle of the board) to -.  If our boards weren't misprinted, we would connect VCC and GND to one of the large terminals at the top of the adapter.





5.  Attach your microprocessor to the adapter. Make sure that Pin 1 (labelled on the bottom side of your microprocessor) connects to Pin 1 (labelled on the top of the breadboard adapter).  Notice the power connections (red and black) in the first image.




6. Connect your power and your serial adapter, start the terminal program, turn on your chip, and you are ready to go!




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