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Step 7Pin Headers Part I
Now is the time to start installing the pin headers. There are a lot of them. We also have to take into account the sockets which will be installed on the bottom of the board to interface with the AVR Dragon. For ease of construction we will install some pin headers, install the sockets, then finish the pin headers.
To solder headers I use a special technique. I lay the pin headers into their position and then put a piece of card on top of them. I keep my thumb on the card to hold the pin headers in place while I flip the board over. Once the board is resting on the pin headers I slide the card out. I then solder just one pin of each header. This will hold them in place and allow you to flip the board back over and check that the headers are flush against the board and the pins are vertical. If they are not, simply put your finger on one of the pins in the pin header, heat up the solder joint and hold the header plumb and flush until the solder hardens. Be careful not to put your finger on the pin you soldered in place or you will get burnt doing this!
1. Place the 2x5 pin headers in J1-J4. Flip the board over and use one of the pin header sockets at the back of the board to prop it up so it is level.
2. Solder one pin of each header. Check that each header is flush with the board and is vertical.
3. Solder the remaining pins of each header.
4. Locate the long single row pin headers and break off 9 sets of 3 pins.
6. Flip the board over and solder one pin of each header.
7. Verify correct header alignment as you did before and make corrections as necessary.
8. Solder all remaining pins for these headers.
To solder headers I use a special technique. I lay the pin headers into their position and then put a piece of card on top of them. I keep my thumb on the card to hold the pin headers in place while I flip the board over. Once the board is resting on the pin headers I slide the card out. I then solder just one pin of each header. This will hold them in place and allow you to flip the board back over and check that the headers are flush against the board and the pins are vertical. If they are not, simply put your finger on one of the pins in the pin header, heat up the solder joint and hold the header plumb and flush until the solder hardens. Be careful not to put your finger on the pin you soldered in place or you will get burnt doing this!
1. Place the 2x5 pin headers in J1-J4. Flip the board over and use one of the pin header sockets at the back of the board to prop it up so it is level.
2. Solder one pin of each header. Check that each header is flush with the board and is vertical.
3. Solder the remaining pins of each header.
4. Locate the long single row pin headers and break off 9 sets of 3 pins.
- This can best be done using two pliers. Grip on either side of the notches and rock back and forth until the header snaps off.
6. Flip the board over and solder one pin of each header.
7. Verify correct header alignment as you did before and make corrections as necessary.
8. Solder all remaining pins for these headers.
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Feb 24, 2009. 3:09 AMGLOPRO
says:
Hi, what do you do when the circuit board does not have pinthrough holes and you have to solder a header on?
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May 14, 2010. 11:23 AMadje
says:
You mean when your board did not have a hole properly drilled and plated? You can either send the board back and get another or try to address the problem yourself. The former is probably the best solution.
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