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2. Locate the Atmega chip. Notice the half-circle mark. With the mark facing away from you,
clip the pin on the far right. This will index the chip making it fit the board in only one way.
The pin you are clipping is not needed in an Arduino application.
3. The chip should fit into the PCB in only one direction. It should not be necessary to bend the
pins. Test fit the chip and adjust the pins as required. Solder the chip in position from the
bottom.
4. Locate the Max 7219CNG chip. Orient the half-moon and adjust the pins as needed to fit in
the PCB. Solder it in place.
5. Locate, Install and solder the 6 pin ISP header. Take care not to push too hard or the pins will
change heights. If this happens re-heat and adjust.
6. Locate and install the 4 digit and 1 digit LED modules. Take care to align the pins and orient
the decimal to the bottom on the 1 digit LED. The 4 digit LED is keyed, the 1 digit is not.
Use care when soldering to ensure the component stays fully seated for a clean finished
appearance.
7. Locate, install, and solder the 3 pin header. Use care when soldering.
8. Install and solder the two 22uf capacitors and the 16mhz crystal. Once you insert the
components bend the leads on the back of the PCB to hold the components in place.
9. Trim the leads on the capacitors and crystal. The leads on the LED displays also need to be
trimmed. Use nippers to trim them flush to the solder joint. Do not cut the solder joint it self.
10. Install the diode, D1 taking care to orient the stripe according to the marking on the PCB.
Solder and trim the leads.
11. Install the Red and Green LED's, reference the parts sheet and markings on the PCB. Take
care to orient the long pin to the + mark on the PCB. Solder and trim the leads.
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