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Arduino TA07-11 5x7 Dot Matrix Display
I built a new Arduino based device this weekend. I was ill and had much time chilling at home and hacked this:
It is a TA01-11 LED matrix from Kingbright. It was a little bit tricky to figure out how it works because it was the first matrix I played with but at the end everything worked fine... ;) Thanks to Rafael for this great hacking session!
In this Example I am using a Kingbright TA07-11 Dot Matrix LED Display using an Arduino as controller.
The code is mostly based on the DirectDriveLEDMatrix example on the Arduino playground website.
The next step will be to use a LED driver IC for keeping the usage of Arduino ouputs low.
The five Transistors are for regulating the voltage on the columns of the Display. In this circuit all LED's are getting the same voltage power of 5V.
The code looks very ugly at the moment, but I will clean it up. It is a dirty written prototype... ;)
Permalink: https://hanez.org/2011/03/07/arduino-ta07-11-5x7-dot-matrix-display/
WTH? My Netduino just arrived
I got my new toy some minutes ago. A Netduino!
Netduino is an open source electronics platform using the .NET Micro Framework. The idea is taken from the Arduino platform but the difference is, that the Netduino is being programmed in .NET and it has a much more powerful 32-bit microcontroller onboard. It is an AT91SAM7X512 with the following specs:
- Atmel 32-bit microcontroller
- Speed: 48MHz, ARM7
- Code Storage: 128 KB
- RAM: 60 KB
Hopefully I could develop with the Mono project for it but at first I will do my work in a Microsoft based environment. Sounds contradictory? Yes, it is... but I want to give it a try... ;)
I am a little bit it ill at the moment but it will be a funny weekend when playing with this nice piece of hardware.
Permalink: https://hanez.org/2011/03/04/wth-my-netduino-just-arrived/
PC/SC for PHP
I have released the source code of my project "PC/SC for PHP" today.
It is an extension for PHP using pcsc-lite for smart card communication based on the PC/SC standard.
It is just an attempt to realize the idea of native and server side smart card communication within a PHP project. It could for example be useful if your web application needs access to crypto for signing, encryption etc. using a smart card as a SAM (Secure Application Module) or as a HSM (Hardware Security Module).
Have fun and please send me some comments...!
Permalink: https://hanez.org/2010/12/17/pcsc-for-php/