A Model Lighthouse

Designed and built at the Sheffield Hackspace using an arduino and bits and pieces of things that you might find lying around in your own home…

Here’s the setup:

An arduino (pro mini) for controlling the SG-90 servo motor
An ESP8266 for wifi access and neopixel control
A piece of gutter and downpipe for the main body
A plastic dome sourced from a solar powered garden lamp
An Aldi’s peanut butter jam jar lid (crucial)
Other bits and bobs scrounged from various unwanted poundland items

If you think this is cool wait until you see the boats!

come and join us to build LinoRobot

Hello,

We’ve finished building the prototype of the LinoRobot and have an understanding of how all the software and hardware fit together.

old robot

There was a few issues along the way and ill summarize what we’ve learnt:

  • ROS and the navigation software requires a faster machine than the current VM.  Now we understand more we’re going to build ROS on the direct hardware.
  • The Raspberry PI doesnt have SWAP memory enabled by default and ROS ran out of memory when first starting ROS.  Enable SWAP for initial ROS startup and then disabled it.
  • We cheated the first time by using ubiquityrobotics ROS image the first time and we’ll probably cheat again, it makes setup a lot easier 🙂
  • Don’t use very cheap cheap motors as they don’t give similar results and the robot goes around in circles.  We bought some more expensive motors this time so hopefully they will move when we want them too.

The parts have arrived and we’re now getting started on the second robot.

Raspberry Pi Flatbed Scanner Server

In a recent donation to the hackspace there was a CanonScan FB630U A4 flatbed scanner and I thought that it could be useful to create a shared network scanner for use by the members.

This plan was gainfully assisted by a spare 256MB Raspberry Pi B, 16GB SD card, power supply & PiBow Raspberry Pi case.

Raspberry Pi setup

Start by downloading the newest versions of Rasbian Lite from the Raspberry Pi website.

Flash the Raspbian image onto the SD card using your tool of choice. I’m mostly using Etcher right now as it verifies after flashing.

Finished result

Raspberry Pi and Scanner