Martyn is an engineer who builds competition go-cart engines. Visual impairment means that reading precision measuring equipment is impossible.
The solution is the combination of a Bluetooth enabled digital micrometer, available for industrial users who log measurements for quality purposes to PCs etc, and a single board computer called a Raspberry Pi Zero. This mini-marvel supports Bluetooth and has been programmed to receive the measurements from the micrometer and using a freely available TTS (Text to Speech) engine, and a small audio amp and speaker, read out the measurement.
Martyn previously had to get other people to make precision measurements of his engines, but now he can make them himself.