LANp – A DIY Arduino network controllable RGB lamp made from scanner parts!

IMG_20140322_162510This is something we have really been meaning to write up. A few weeks ago we ripped out an RGB LED from an old Canon Scanner that was laying around and going to waste. Since then we’ve been playing around with the RGB LED element and decided to put it to good use.

We have come up with LANp – This is an Arduino and Ethernet Shield that controls an RGB LED colour real-time with a Javascript colour picker.

Take a look below for the YouTube video of this working at the bottom of the page!

Click here to read more..

Let’s build a functional Arduino webserver with the Ethernet/SD Card shield

ardethernetIt’s that time of the week! We’ve been playing around with the Ethernet shield again and this time we’ve come up with an article about creating a webserver from scratch; using the Arduino SD/Ethernet Shield.

This article will show you how to serve files from the SD Card file system and use Javascript to get sensor/variable values via AJAX.

This would be ideal for people looking to add a basic web system to their projects.

 

Click here to read more..

MicroView: Chip-sized Arduino with built-in OLED Display on Kickstarter

oledWhilst browsing Kickstarter we came across these MicroView Ardunio’s which is an Arduino with a built-in OLED Display; as well as providing downloadable libraries for quickly displaying text, sprites, graphs and gauges on the OLED.

The Microview has already reached it’s pledge goal with 27 days remaining (at the time of writing this post)

We think it’s a really unique idea and it would be pretty fun to have one of these if you have a small project in mind that requires some sort of visual display.

Click here to read more..

Quick Hack – Connect a C64 joystick to a PC

atarijoystickI’ve been trying to work on some CPLD stuff and have hit a brick wall. I’m annoyed. I need to have a break from the logic stuff so I’m finally going to do something I’ve been meaning to do for a while. I’m going to connect an old 9-pin joystick up to my PC so I can play some old Commodore 64 games.

This isn’t going to be a particularly elegant solution and I do have plans for a much better method in future but for now, this will suffice and will let me play some old games quickly. I’m also writing this guide as I go along so please excuse the present tense.

Click here to read more..

Product Review – Arachnid Labs Circuit Pattern Trading Cards

IMAG0282I’ll start off by saying, No, this isn’t a card game similar to top trumps. It’s not even a game at all.

Let’s start at the beginning……

Nick over at Arachnid Labs designed a series of playing cards with a little electronic circuit and description printed onto each one. His original idea was to include one with every item ordered from his product range as a fun little gift. The cards were such a hit that he was soon inundated with requests from customers wanting to buy the full set. Nick did the only thing he could…. he obliged and had more sets printed up, designed a nice looking box for them and sold them as a product in their own right. Great news for the rest of us!

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Getting your Nokia 5110 LCD up and running on an Arduino

nokiaWe purchased one of these very cheap, very cool 84×84 LCD backlit screens off of eBay a couple of weeks ago.

It’s a very nice product for adding visual elements to your projects at a very low price. We paid £3.89 for the screen and it was delivered a few days later.

Take a look below for connection instructions and example code from Adafruit on how to get this up and running with your Arduino.
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Getting started with CPLDs – Part 8

cpldjIn this article, we’re going to re-use the hardware from the 4-bit binary adder but convert it into a 4-bit binary subtractor instead.

It’s a very simple modification to the schematic design. We simply invert the B inputs and leave the A inputs as they are. Instead of adding A and B, this configuration will subtract B from A.

Click here to read more..

Getting started with CPLDs – Index

cpldjHere you will find links to all the articles that make up our CPLD for beginners guide.

We’d love to hear your feedback about this guide. If we’ve got something wrong or if there’s anything specific you’d like us to cover, please don’t hesitate to get in touch.

Part 1 – Installing the Altera Quartus II software
Part 2 – Entering your first design
Part 3 – Lighting an LED
Part 4 – Adding a button
Part 5 – Making a half-adder
Part 6 – Making a full-adder
Part 7 – Making a 4-bit binary adder
Part 8 – Making a 4-bit binary subtractor

 

 

 

Getting Started with CPLDs – Part 7

cpldjIn part 6, we built a 1-bit full adder. In this part we’re going to expand upon that and build a complete 4-bit binary adder. I have made the assumption that you already know about the binary number system but in case you don’t, have a look here and do some searching to learn about it.

Back? Great, let’s get on with it. Grab your CPLD development board, a breadboard and the usual handful of LED, switches and resistors. We will need switches for this guide instead of buttons.

Click here to read more..

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