general:ukhasbadgeboard
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| general:ukhasbadgeboard [2012/09/23 09:01] – created upu | general:ukhasbadgeboard [2012/10/16 08:56] (current) – [Full Bill Of Materials] fsphil | ||
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| ===== Introduction ===== | ===== Introduction ===== | ||
| - | The UKHAS Badgeboard was given to attendees of the 2012 UKHAS Conference in London on the 20th of Septemeber 2012. The concept was by James Coxon M6JCX and the design was by Anthony Stirk M0UPU. It was designed in Eagle and [[http:// | + | The UKHAS Badgeboard was given to attendees of the 2012 UKHAS Conference in London on the 20th of Septemeber 2012. The concept was by James Coxon M6JCX and the design was by Anthony Stirk M0UPU. It was designed in Eagle and [[http:// |
| {{: | {{: | ||
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| ===== Files ===== | ===== Files ===== | ||
| - | The board schematic is here. \\ | + | The board schematic |
| - | The Eagle files are here. \\ | + | The Eagle files {{: |
| - | The Gerbers | + | The Gerbers |
| ===== Known Issues ===== | ===== Known Issues ===== | ||
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| * SDN on the RFM22B was intended to connect to the microcontroller so you could switch the RFM22B off and on. However this was missed. The fix is either bridge SDN to GND with an 0603 R0 resistor (pins are next to each other) this puts the module permanently on. Or run a wire from SDN to A0-A5 and then use that to switch the module off/on. | * SDN on the RFM22B was intended to connect to the microcontroller so you could switch the RFM22B off and on. However this was missed. The fix is either bridge SDN to GND with an 0603 R0 resistor (pins are next to each other) this puts the module permanently on. Or run a wire from SDN to A0-A5 and then use that to switch the module off/on. | ||
| * A6/A7 are not normally usable in the Arduino enviroment, you can enable these see Enabling Ports A6/A7 Board Details below. Please note you can only use these two for analogue reads, you cannot use them for digital operations like A0-A5. | * A6/A7 are not normally usable in the Arduino enviroment, you can enable these see Enabling Ports A6/A7 Board Details below. Please note you can only use these two for analogue reads, you cannot use them for digital operations like A0-A5. | ||
| + | * The SCK pin for the RFM22B and the ISCP header are shared - if you are unable to use a programmer it may be due to the SCK pins being distrupted, to fix you'll need to cut the line (by unsoldering the RFM22b pin). To diagnose this problem check avrdude (or arduino) which will give you an error: | ||
| + | < | ||
| + | avrdude: initialization failed, rc=-1 </ | ||
| ===== Bill of Materials As Supplied ===== | ===== Bill of Materials As Supplied ===== | ||
| < | < | ||
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| C6 0805 4.7µF Tantalum Capacitor i.e KEMET - T491A475K010AT | C6 0805 4.7µF Tantalum Capacitor i.e KEMET - T491A475K010AT | ||
| R1, | R1, | ||
| - | R3 0603 47K (Optional would advise use of PWN to drive NTX2) | + | R3 0603 47K (Optional would advise use of PWM to drive NTX2) |
| - | R4 0603 39K (Optional would advise use of PWN to drive NTX2) | + | R4 0603 39K (Optional would advise use of PWM to drive NTX2) |
| R5, | R5, | ||
| R6 0603 100K | R6 0603 100K | ||
general/ukhasbadgeboard.1348390867.txt.gz · Last modified: 2012/09/23 09:01 by upu