Documentation for Tiny-08 Board (v2)
Version 2 of our Tiny-08 board, which was released in February 2009, is shown in the following photo mounted to the right of the original Tiny-08 for comparison.
As you can see in the photo, the following improvements have been made to the original board:
- The board is narrower than version 1, so that power and ground connections can be made without removing Tiny-08 from the breadboard.
- The legend for the I/O header is larger and easier to read.
- A 1N4148 diode has been added to the Input 3 circuitry (see the Serin documentation in Part II of the PICAXE Manual for details). As a result, the Serin command functions correctly without the necessity of adding the diode to your breadboard circuitry.
- A 3-pin header now provides a place to keep the 2-pin jumper when you want to disconnect the LED from Output 0.
Parts List (All parts are available on this site.)
|R1||Resistor, 180 ohm, 1/4 Watt|
|R2||Resistor, 22k, 1/4 Watt|
|R3||Resistor, 10k, 1/4 Watt|
|C1||Cap, .01 uF Ceramic|
|LED||LED, Red Resistorized, 3mm or 5mm|
|IC1||IC Socket, 8-pin|
|None||Header, Male, snap, 3-pin|
|None||Shorting Jumper, 2-pin|
|None||Header, Male, snap, 7-pin|
|None||Header, Male, 2x5|
Note: On all of our PC boards for PICAXE(R) processors, the 2x5 header at the top edge of the board and the row of header pins along the bottom edge of the board are inserted from the bottom of the board and soldered on the top of the board. In other words, the black plastic piece that connects the pins is below the board. Solder these headers as the last step (see below).
To assemble the Tiny-08 project board, it is best to proceed from the smallest to the largest parts (which is the order in which they are shown in the parts list). Be sure to clean the board before soldering - a "Scotch-Brite" plastic abrasive pad works well for this purpose. When soldering the diodes and the LED, be sure to insert them in the correct orientation: the cathodes of both diodes should be toward the left side of the board (as indicated on the silk-screen) and the LED cathode (shorter one) should be inserted into the square pad on the right. You can use either a 3mm or a 5mm LED - either will fit comfortably on the board.
When you have soldered all the parts that mount on the top of the board (and solder on the bottom), make sure all the excess leads have been clipped. At this point you may want to rub the bottom of the board a few times on a piece of emery-type sand paper to remove any sharp edges. You can use flux remover to clean the bottom of the board, but I have found that ordinary isopropyl alcohol (at least 90% pure) and a tooth brush works just as well for this purpose and it's easier on your hands. The following photo shows the results of sanding and cleaning the bottom of the board.
Now you are ready to insert and solder the 2x5 header at the top edge of the board and the 7-pin header at the bottom edge of the board. As mentioned above, each of these headers is inserted from the bottom of the board and soldered on the top of the board.
In order to simplify this step, it's helpful to first insert the longer ends of both headers into a breadboard, appropriately spaced so that the Tiny-08 board fits on top (see the following photo). Once you have the Tiny-08 board properly mounted on the headers, solder all the header pins on the top side of the board.
In order to connect the Tiny-08 project board (or any of our PICAXE-related boards) to your PC, you will need to construct a suitable programming cable - just follow the detailed instructions presented here.
See the photo at the top of this page for the correct installation of the Tiny-08 project board on a breadboard. Notice that the silk-screen labels identify the PICAXE I/O pin connections.
No additional circuitry is necessary to test the Tiny-08 board - just write a program to blink the on-board LED (on output0) and download it to the board. Be sure the shorting jumper is installed on the two pins to the right of the 3-pin header or the LED won't light!
If you have any problems getting your Tiny-08 project board to function properly, email me at Ron@JRHackett.net and I will do what I can to help.
Thank you for purchasing a JRHackett.net product!