The title says it all – this article describes a microcontroller-compatible current sensor module you can build yourself ... Luca Dentella has written a great tutorial on how to interface ACS712 ...

and it seems that the design idea is based roughly on the test/simulation sample circuit (adapted from ultrasonic sensor datasheets) shown below: The transmitted/trigger pulse (bursts from the ...

It uses a Freescale microcontroller to read from the four bumper-mounted ultrasonic sensors. But just looking at what parts are used obviously isn’t enough to satisfy a hacker’s appetite for ...