kombee Assembly Instructions
These instructions are for the kombee v0.2 PCB
|C1, C2||22 pF 0805 Capacitor - Not connected if Resonator is used|
|C3,C5,C6||100 nF 0805 Capacitor|
|R1||10k 0805 Resistor|
|U1||28 Pin Dip Socket|
|Q1||16Mhz Resonator - OR - 16Mhz Crystal|
|TTLSerial||2.54mm 5 Pin header - Optional|
|XB1||2.0mm 10 pin hearder|
|RF||2x4 2.54mm pitch female pin header|
The kombee is not 5V compatible, do not apply 5v to the ttl serial header. If you are using a serial programmer which cannot be jumper-ed to run at 3.3v you need to remove the nRF24L01 transceiver.
- Step 1: Solder the 10k pull-up resistor. Your BOM contains a few SMD parts. As R1 is the only resistor it will Be 1 of them.
- Step 2: Solder the three.1uF/100nF 0805 capacitors C3,C5, C6. There is no polarity for these. From your BOM the 3 caps will be in a strip of 3 caps.
- Step 3: If you will be using the Crystal instead of an oscillator flip the board over and solder the 22pF caps.
- Step 4: Add the 28 Pin Socket
- step 5:Install the crystal or resonator now, In this picture a Crystal was used, the arrows indicate the soldering locations for the crystal. If using an oscillator there is no need for the 22pF caps. If using a Resonator it will also use the middle pad.
- Step 6:Add the 2x4 female pin header
- Step 7 : Add the Xbee pins
- Step 8: If you will be using an xbee explorer board to program your kombee board you do not need to install the serial header shown here, if using a regular FTDI adapter you will need to add this header. NOTE you cannot apply 5v power to this header while the RF transceiver is attached.
- Step 9: Add your Atmega328P-PU
Testing10: connect your kombee and check to make sure that your source power is set to 3.3v
Do not add the RF transceiver until after you have tested voltage.
11. Now to test your board is working properly you need to connect it to power, connect the kombee to your serial programmer. Measure the voltage at pins 1&2 of the RF header. If the reading on pin2 is between 3.3v and 3.6v you did it!!!!