ZeroPoint • The PiZero-sized analogue gauge for RaspberryPi

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I excitedly jumped at the chance to review this device as I had the perfect project for an analogue pointer, which was in combination with an experiment I wanted to run. Unfortunately I have been unable to locate particular parts for this experiment so I’ve had to shelve that for now. Grr…
The pHAT has the same footprint as a Raspbery PiZero, although the stepper-motor housing overhangs the PCB by a few mm. This is on the same edge that the PiZero has its connectors on, so I can’t imagine a way that it’d be an issue. Also, it can be used on a full-sized Pi.

Using the test code provided by 4Tronix running on the command line, it’s quite satisfying to keep tapping numbers in, in order to make the needle swiftly and smoothly move! Gareth had also provided some dial templates to get us started.


THIS device is going to be responsible for me learning to code in Python…

Note: the female header is surface-mount not through-hole, SO DON’T just yank it to remove it! Use something like a screwdriver to gently prise along the headers a bit at a time, so as to avoiding bending any pins.


I soldered a right-angled header to my PiZero for mounting it on a breadboard adapter. This also allows the rear of the pHAT board to be seen:


I’m not going to duplicate the technical specifications as they can be found here: http://4tronix.co.uk/store/index.php?rt=product/product&product_id=567

However, my next experiment at home will be monitoring wind-velocity over time, at particular points around our property, and our neighbours’. This is intended to lead to a wind turbine project!! 

Like my neighbour said; even if we only generate enough to charge mobile phones, it’s a start. 

The music in the video was kindly provided by the sickengly talented, and jolly nice JT Bruce • Plunge Into Hyperreality from the album The Dreamer’s Paradox

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