Review: Slice, the Pi Compute Module-based media player

Updated My original idea was to review the Raspberry Pi Compute Module. But the thing about the Compute Module is that it’s not an end-user product: it was designed for manufacturers looking for an ARM-based platform on which they can build devices they can sell. Unlike the Raspberry Pi itself, the Compute Module is not intended for makers or for computing hobbyists. To evaluate the Compute Module what I really needed to look at was a product based upon it.

So I waited for one.


Slice of Pi?

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Review: Imagination Technologies’ MIPS Creator CI20

Time was when chip makers’ processor evaluation boards were well beyond the reach of ordinary mortals. That didn’t matter, of course: ordinary mortals weren’t interested in small, nude motherboards designed to help designers of embedded systems judge a microprocessor’s suitability for the application they were working on.

MIPS Creator CI20

Imagination Technologies’ MIPS Creator CI20

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Review: the PiFace Real-Time Clock

Unhook a Raspberry Pi from the mains and it forgets the time and date. It’ll only get them back again if you re-connect it to the Internet or enter the data manually. As a Pi user who doesn’t keep his kit connected – I usually wire and power it up when I need it – and doesn’t always bother with the Ethernet cable when he does, I’ve been after a decent real-time clock (RTC) add-on for quite a while. An RTC allows your Pi to keep time, even when the Pi’s power is cut.

PiFace RTC

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Review: the GrovePi+ Starter Kit

When it comes to hacking hardware there’s an easy way and there’s a hard way.

The hard way involves connecting peripherals direct to one of the standard buses supported by your Raspberry Pi, Arduino, Beaglebone or whatever. Buses like I²C, SPI, UART and 1-Wire. You’ll need to take care with your wiring: have you got the right pull-up or pull-down resistor? Is there too much capacitance in the line?

GrovePi+ Starter Kit

Dexter Industries and Seeed Studios’ GrovePi+ Starter Kit

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(Retro) Review: Raspberry Pi B+

Better late than never. An edited version of this review appeared in The Register in August 2014. I intended to reproduce the original here, but never got round to it. At long last – and a tad late now the Pi 2 is out, of course – here for the record…

You might think that were you a purveyor of a nifty compact computer selling by the millions, you’d consider two years after the debut of your first offering that it was high time you tempted back buyers with a go-faster, more capacious and shinier model. Heck, Apple and others don’t even wait that long: they upgrade products year in, year out.

Raspberry Pi B+

The B+

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Review: Pimoroni/Cyntech Pibrella

There is no shortage of clip-on boards designed for the Raspberry Pi, almost all designed to make the tiny computer’s GPIO pins more accessible in order to ease the connection of devices to it, particularly ones that operate at voltages that are not Pi friendly.


Electronics kit: Pimoroni/Cyntech Pibtrella

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The Sinclair ZX81: a Raspberry Pi retro restyle – Part 2

Previously on ‘ZX81: a Raspberry Pi retro restyle’: I used a headerless Arduino Leonardo to connect a ZX81 microcomputer keyboard to a Raspberry Pi via USB, using code to handle normal, shifted and function-shifted key presses.

After some searching on eBay, I found an old ZX81 going cheap because it lacked cables, though when it arrived, I found the computer itself to be in excellent condition. Possibly it has never been used, though how if that were the case the cables were lost and the box got so tatty is a mystery I will probably never solve.

ZX keyboard controller

A new ZX keyboard connected to the USB controller – an Arduino Leonardo

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