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8-Channel ADC Rpi HAT For Analog-To-Digital Conversions
Raspberry Pi enthusiasts may be interested in a new 8 channel ADC which has been specifically created for the Raspberry Pi which is capable of providing analog-to-digital conversions.
Created by Chris Burgess the 8-channel ADC for the Raspberry Pi is now available to purchase for $17 or £12.56 directly from the awesome Tindie website.
Chris designed the Raspberry Pi HAT due to the lack of anything currently available in the market when he was building a high powered robot that needed to be able to accurately measure voltages and take analog sensor readings.
Based on the MCP3008 ADC controller IC:
- 16-pin DIP package.
- 200 ksps max. sampling rate at VDD = 5V
- 10-Bits of resolution (when powered with 5V.)
- Analog inputs programmable as single-ended or pseudo-differential pairs
- On-chip sample and hold
- SPI serial interface (modes 0,0 and 1,1)
- Low power CMOS technology
- 5 nA typical standby current, 2 µA max.
- 500 µA max. active current at 5V
- Industrial temp range: -40°C to +85°C
- Adafruit Tutorial
8 ADC input Channels:
- 4-channels configured with voltage divider to allow measuring voltage up to 14.5VDC.
- 4-channels configured with zero-ohm jumpers to allow for direct-input for ADC measurements.
- All channels can be reconfigured for zero-ohm jumpers, inline-resistors or in-line capacitors.
- Channel 0-3 can also be reconfigured for pull-down resistors, or ground-referenced capacitors.
- 3.3V, 5V, and GND connection terminals.
- Board can back-power Raspberry Pi via 5V and GND connection terminals.
- High-quality screw-terminals on all channels.
- Hardware or Software SPI, selectable via jumpers.
- SPI can use CEO of CE1, selectable via solder jumper.
- Footprint for EEPROM and supporting passive components to allow you to turn into true rPI HAT (EEPROM and passives optional.)
- Stackable header option.