Difference between revisions of "Hardware: Hive Interface Board 4"
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| + | ==Summary== | ||
| + | |||
| + | Can operate with the Pi or as a standalone Bluetooth Low Energy (BLE) device. Replaces the HX711 single channel ADC with an 8 channel. | ||
| + | |||
| + | ==Bug Fixes== | ||
| + | |||
| + | #Move the LED from Pin 7 GPCLK0 (RPi GPIO 7 or BCM GPIO 4) to Pin 11 (RPi GPIO 0 or BCM GPIO 17) so it doesn't conflict with the 1-Wire default pin. | ||
| + | |||
| + | ==Features== | ||
| + | *AD7124-8 24 bit ADC with 8 differential inputs | ||
| + | |||
| + | Provides independent channels for each of the 4 load cells or four scales with 4 loads cells in parallel. | ||
| + | |||
| + | *Instrumentation Amplifiers for load cells. | ||
| + | |||
| + | Maybe not necessary. Preliminary tests using the EVAL-AD7124-8 board are able to resolve to .001 lbs (.45 g) without external amplifiers. | ||
| + | |||
| + | *Bluetooth Low Energy (BLE) support | ||
| + | |||
| + | Uses the BMD301 containing the Nordic nRF52 32 bit ARM processor with GPIO lines and eight 16 bit ADC inputs. | ||
| + | |||
| − | |||
| − | |||
| − | |||
*BMD301 32 bit ARM processor with GPIO lines and eight 16 bit ADC inputs | *BMD301 32 bit ARM processor with GPIO lines and eight 16 bit ADC inputs | ||
| − | *40 pin header plug into a Pi | + | *40 pin header plug into a Pi. |
| + | |||
| + | The board can run from the Pi without the BMD301 as a replacement for the HX711 | ||
*two coin cells to power the BMD301 | *two coin cells to power the BMD301 | ||
| − | |||
| − | |||
*BMD301 (Nordic nRF52) can be programmed via the Pi. | *BMD301 (Nordic nRF52) can be programmed via the Pi. | ||
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[[Media:AD7124-8.pdf|AD7124-8 (pdf)]] | [[Media:AD7124-8.pdf|AD7124-8 (pdf)]] | ||
| + | |||
| + | |||
| + | http://www.analog.com/en/design-center/design-tools-and-calculators/converter-tools.html | ||
Latest revision as of 18:03, 12 December 2017
Contents
Summary
Can operate with the Pi or as a standalone Bluetooth Low Energy (BLE) device. Replaces the HX711 single channel ADC with an 8 channel.
Bug Fixes
- Move the LED from Pin 7 GPCLK0 (RPi GPIO 7 or BCM GPIO 4) to Pin 11 (RPi GPIO 0 or BCM GPIO 17) so it doesn't conflict with the 1-Wire default pin.
Features
- AD7124-8 24 bit ADC with 8 differential inputs
Provides independent channels for each of the 4 load cells or four scales with 4 loads cells in parallel.
- Instrumentation Amplifiers for load cells.
Maybe not necessary. Preliminary tests using the EVAL-AD7124-8 board are able to resolve to .001 lbs (.45 g) without external amplifiers.
- Bluetooth Low Energy (BLE) support
Uses the BMD301 containing the Nordic nRF52 32 bit ARM processor with GPIO lines and eight 16 bit ADC inputs.
- BMD301 32 bit ARM processor with GPIO lines and eight 16 bit ADC inputs
- 40 pin header plug into a Pi.
The board can run from the Pi without the BMD301 as a replacement for the HX711
- two coin cells to power the BMD301
- BMD301 (Nordic nRF52) can be programmed via the Pi.
Data Sheets
http://www.analog.com/en/design-center/design-tools-and-calculators/converter-tools.html
