Pico Technology’s DrDAQ single-board data logger adds 17 I/O channels to a Raspberry Pi, writes Richard Wilson.
When connected to the Raspberry Pi single-board computer, it forms a data logging system that can be integrated into a Linux application.
As a result a Linux application can have access to a 100kHz oscilloscope, arbitrary waveform generator, 4 digital I/Os (2 with pulse-counting input and PWM output), 24-bit RGB LED, built-in light sensor, temperature sensor, microphone and sound level sensor, resistance measuring input and pH/redox sensor input.
There are also 3 inputs for Pico’s own sensors or for custom devices. DrDAQ requires just a single USB connection for power and data.
Pico Technology has released a Debian driver and C++ example code for free download. The example code displays a simple text menu that allows you to capture data, control the digital I/O pins, set up the signal generator and drive the LED.
If you don’t already have a DrDAQ data logger, you can buy one from Pico or its distributors for only £99 RRP.