As part of Team BitPhase from Stellenbosch University, we made it to the final round of the inaugural 2017 SANReN Cyber Security Challenge in early December 2017, hosted in parallel with the annual 2017 CHPC Conference. We were fortunate to leave as the winning team of the Main challenge! Several days of awesome work for […]
The yearly Amazon AWS Summit in Cape Town was great fun – Werner Vogels (Amazon CTO) sure was awesome!
A couple friends and I participated in the Summit’s IoT Hackathon, which Intel kindly sponsored. Given an Arduino 101 (containing an Intel® Curie™) and a Grove starter kit, we had a couple of hours to have fun and see what we could hack together. As we were new to AWS’s IoT platform and the Python libraries we were given, it took us some time to get it up and running but we ended up with a working prototype.
We designed a prototype of a notification system for a cold room refrigeration system to monitor temperature and door opening/closing events, which are sent over to the AWS cloud and logged. We planned to add a stepper motor to simulate our door among other features, but we didn’t have enough time; We had to just use a push button to toggle the door opening and closing.
All in all, it was great fun. Our team came second place, so next year we’ll be back for round two!
Whew, long time without another post – it’s been a busy time, glad to get back to blogging.
This post is going to explain the basics of using American 110V Christmas lights on a 220V electrical supply, by splitting the light string in half and putting them in series instead of using a dedicated voltage converter.
They looked and worked great in the hotel room, I just needed to modify them to work on a 220V supply that we use in South Africa (and most of the rest of the world). I could have used a voltage converter but this string uses over 100W, a large transformer would be needed ($$$).
A cheap and easy solution is just to split the string in half, and have both sections connected in series; each section would receive 110V.
UPDATE: Project featured on Hackaday.com! See here
I recently finished up on my Peltier Mini fridge project, and it works great!
It can cool down whatever you want that’ll fit in it — six 330ml cans for example — and can get down to –2.1°C!
Watch the video for a full description and how it works. I gotta say, it’s really cool, excuse the pun!
Around a month ago I purchased a Sipik SK68 LED flashlight clone on eBay, for a grand total of $4.04! Shipping took around three weeks which isn’t bad considering it was free, but when I started using it there was a really annoying design flaw. The Flashlight It is focusable and runs on one AA […]
Character LCDs are displays that consist of many character “blocks”, and each block can display a letter, number, etc. In the world today, there is one display controller/driver that dominates this market, the Hitachi HD44780 driver. I have talked about this in another post on reverse engineering a printer LCD. HD44780-based character LCDs usually come […]
A few weekends ago I got hold of an old broken Canon printer/scanner combo. One thing that caught my eye was the display. It was a 2×20 character LCD (2 lines, 20 characters per line) which is better than some others I have which are 2×16.
Here is an image of my finished example project with this display:
Work out exactly what levels you need to enchant your armour/tools at in order to receive a specific enchantment, calculate all possible enchantments for any item with a certain experience level and calculate the most efficient way to get to a certain experience level. This tool does all of this, and is an essential tool […]
The Nokia 3310 LCD is well known in the electronics community; I decided to have some fun and get it to do things the designers probably weren’t intending it to ever do! 😛
This LCD is a monochrome graphics LCD with a resolution of 84×48 and while relatively old (1998), it’s brilliant for its very low price.
This controller uses the PCD8544 controller IC has an easy to use SPI protocol and handles all the hard work of driving this display (multiplexing, generating bias voltages, ect.) Using the display is relatively easy with any microcontroller, I used a breakout board for ease of access on a breadboard/stripboard.
I have been attending the George Education Electronics Engineering & Computer Society, or G3ECS, and have been really enjoying it. Anyone living in the George/Garden Route area should really attend this. We have a huge variety of people attending from all ages, and we are planning to build a couple of robots. I enjoy it […]