User:ZdenekBroz/devices: Difference between revisions
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Planned devices for the XO. |
Planned devices for the XO. |
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Devices will be connected to special unit powered by |
Devices will be connected to special unit powered by SiLabs programmable CPU. |
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Here are some ideas for possible devices: |
Here are some ideas for possible devices: |
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* Photodiode |
* Photodiode |
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* PH meter |
* PH meter |
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* TeleHealth Module |
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*: See also the [[Digital Signal Processing]] page for work being done in India |
*: See also the [[Digital Signal Processing]] page for work being done in India |
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Calculated price: |
Calculated price: |
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CPU unit: cca |
CPU unit: cca 3$<br> |
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board + additional electronic parts: 17$<br> |
board + additional electronic parts: 17$<br> |
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connectors: 2$<br> |
connectors: 2$<br> |
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Total price: 25$ (retail price) |
Total price: 25$ (retail price) |
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==CPU unit vs MicIn port== |
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* Oscilloscope on the CPU unit can sample up to 1MHz |
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* CPU unit automatically switches range when measuring resistance, voltage and current |
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* CPU unit is much safer for the laptop (only CPU unit will be damaged). If protection on MicIn port fails then whole laptop or sound card is destroyed. |
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* CPU unit can switch ranges easily without any additional software or hardware |
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* CPU unit can supply 5V and 3,3V to connected sensors |
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* Oscilloscope can have more than one channel with the CPU unit |
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==Sensors== |
==Sensors== |
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All existing sensors |
==All existing sensors== |
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[http://www.vernier.com/probes/index.html Technical details] |
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<table width=90%><tr><td> |
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Latest revision as of 20:29, 24 October 2007
Planned devices for the XO.
Devices will be connected to special unit powered by SiLabs programmable CPU.
Here are some ideas for possible devices:
- Thermometer
- Voltmeter, ampermeter, ohmmeter
- Oscilloscope
- Photodiode
- PH meter
- TeleHealth Module
- See also the Digital Signal Processing page for work being done in India
Processor unit
processor type: C8051F321 - Full Speed USB, 16k ISP FLASH MCU Family - ETC CPU specification
cpu size: 6mm x 6mm
board size: 15mm x 30mm
case size: 20mm x 40mm (size similar to USB Bluetooth adapter )
Calculated price:
CPU unit: cca 3$
board + additional electronic parts: 17$
connectors: 2$
Total price: 25$ (retail price)
Sensors
Sensors will be connected to the CPU unit. The CPU unit will measure values from the sensors and feed them into application on the XO. (CPU can use every sensor that can convert measurement into voltage or current)
Planned sensors:
- Thermometer (cca 2$)
- Voltmeter, ampermeter, ohmmeter, oscilloscope (cca 1$)
- Photodiode (cca 2$)
- PH meter
(if you find cheap sensors please add them into this list)
All existing sensors
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(please submit more ideas here)
Questions about this hardware
(please submit all your questions here so we can answer them - your feedback is VERY important)