What can you do with an Analogue to Digital Convertor?

Following the post on the Custard Pi 2 which has 2 analogue inputs, this one looks at some applications for A to D convertors.

Analogue input output board for the Raspberry Pi

The Custard Pi 2 is nearing launch. Just finished all the documentation for it to allow users to get the most from it. This has been done as  PowerPoint presentation and has been uploaded to Slideshare.

Using the Raspberry Pi as an energy monitor

If one could easily monitor energy pulses with the Raspberry Pi, then it could be used as an energy monitor. By running a web browser on the Pi, this data could be looked at from anywhere in the world. This post shows how the Raspberry Pi can be used to collect energy usage data from a domestic electricity meter.

UPDATED to show LED PULSE SENSOR from Crucible Technologies