8 x 2mm 10pin XBee Socket (SKU#: PRT-08272) = $10.00
4 x Breakout Board for XBee Module (SKU#: BOB-08276) = $11.80
Sub-Total: $21.80
Shipping & Handling: $3.30
Grand Total: $25.10
Total project cost so far is $426.28.
Thursday, February 28, 2008
XBee Order
3x XBee Series 1 at $19.00 each = $57.00
4x thermistor at $0.13 each = $0.52
4x thermistor at $0.15 each = $0.60
4x thermistor at $0.13 each = $0.52
Shipping = $6.69
Total = $65.33
Total project cost so far is $401.18.
4x thermistor at $0.13 each = $0.52
4x thermistor at $0.15 each = $0.60
4x thermistor at $0.13 each = $0.52
Shipping = $6.69
Total = $65.33
Total project cost so far is $401.18.
Friday, February 22, 2008
Even more progress
Thursday Update
Since we got the USART working last time, our goal today was to start using the XBees with the Butterflies. First we set up the XBees with the development boards and had them broadcast to each other; then we set up the Butterflies with MAX232s and had them receive a broadcast from one of the XBees connected to a dev board. Writing this makes it sound quick, but it most certainly was not. But we now have a true point-to-multipoint network setup.
And we did some other stuff but it's late and I want to sleep.
Since we got the USART working last time, our goal today was to start using the XBees with the Butterflies. First we set up the XBees with the development boards and had them broadcast to each other; then we set up the Butterflies with MAX232s and had them receive a broadcast from one of the XBees connected to a dev board. Writing this makes it sound quick, but it most certainly was not. But we now have a true point-to-multipoint network setup.
And we did some other stuff but it's late and I want to sleep.
More progress
Tuesday Update
We got the Butterfly's USART working. We are now able to send serial data to and from the Butterfly at 115k baud (the highest rate the XBees will be able to use) with 0% error. This allows us to easily test the ADC by having it spit readings to HyperTerminal. It appears the ADC is fully functional.
We also worked on the pre-amplifier for the ADC. The voltage levels we get out of line level MP3 players and audio jacks seems to range between 0-0.3V. The ADC can read values between 0-3V. So in order to utilize the ADC's full precision, we will need to amplify the input by a gain of about 10, we think.
We got the Butterfly's USART working. We are now able to send serial data to and from the Butterfly at 115k baud (the highest rate the XBees will be able to use) with 0% error. This allows us to easily test the ADC by having it spit readings to HyperTerminal. It appears the ADC is fully functional.
We also worked on the pre-amplifier for the ADC. The voltage levels we get out of line level MP3 players and audio jacks seems to range between 0-0.3V. The ADC can read values between 0-3V. So in order to utilize the ADC's full precision, we will need to amplify the input by a gain of about 10, we think.
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