July 24th, 2008

xu1541 Interface

xu1541 Interface

The xu1541 is the modern way to connect CBM IEC bus devices to todays USB equipped PCs and it is meant to replace the printer port solutions based on the so-called original x1541 cable. The xu1541 interface allows you e.g. to attach a VIC1541 disk drive to your desktop PC as depicted below. This allows for easy transfer of disk images from and to the old units and helps you preserve your ancient data.

xu1541 Interface: [Link]

Interfacing SD Card With Arduino

This lets you write and read byte values from an sd card. It’s very simple to use. The schematic uses some resistors in a voltage divider to drop down the arduino 5v logic to the sd cards 3v3 logic. So all outgoing signals from the arduino are dropped to 3v3. Incoming signals to the arduino are fine because 3v3 is above logic 1 for arduino. The 3v3 voltage supply from the decimelia was used to supply power to the sd card.

Interfacing SD Card With Arduino: [Link]


The schematic shows that wiring the LCD to the HEF4094 is a simple operation. It has been drawn in a way that makes possible to develop this as part of a single sided PCB including a variable resistor to control the LCDs contrast. Note that the pinout of the LCD module may differ slightly from the pinout depicted; some LCD modules have pins 15 and 16 on the left side, before pin 1.

3 wires interface for LCD display: [Link]

Webcam With Servo And Web Interface

The purpose of this project is to show, how you can build a surveillance system with web-page interface. The webcam can be moved vertical or horizontal through the interface, but only in the area that border sensors will allow. The control page is secured with login system, where the user types in an user-name and a password.

On the control page the user can control how the webcam will turn and how many steps it will run. The user can also turn the webcam on and off via web interface. Information about the states will immediately update on the screen. User can also turn the motion detector online, if the camera detects motion, it will automatically save the frames. Naming of the pictures is done with “timestamps”, so it is possible to find out when the picture was taken.

The part that interests me on this project is the servo, because a few years ago i was thinking to something like this, but i never build it. Now it’s nice to see, someone actually build it.
Webcam With Servo And Web Interface: [Link][via]

Laptop LCD Display to VGA Interface

Now this is a project i always wanted to build, but never had the chance, or the mood. Its kind of complicated, so beginners shouldn’t approach this project. Thats probably the reason i did not build it myself because when it first came up to me this idea i was still a beginner and did not had enough experience, and even now when i can say i have some experience i still could get in trouble with this project. The author of this project explains the problems that he came across and how he solved them. You should expect some pixels looking distort, the project its a work in progress and even in the final form you cant get perfect results. Unfortunately the author fried its panel until the completion of the project by accidentally switching the +12V and +5V lines. So he says it will finish the work on project as soon as he gets a new LCD panel.

Laptop LCD Display to VGA InterfaceLaptop LCD Display to VGA Interface

Laptop LCD Display to VGA Interface

[original article link]

[Schematic link]

Since so many people showed interest in the LCD to VGA interface project I decided I updated this article with some new info. For example this guy did it to his 5 inch TFT LCD, and he used the following schematic:

lcd display to vga interface

You might considering the standard VGA pinout before anything else on this project, because you are basically taking a signal from the VGA output and interfacing it with the LCD input:

standard vga cable pinout

Basically you’re gonna have to supply to your LCD panel RGB and sync signals and you might use the following schematic which provide RGB signals + composite sync signal :

VGA to RGB and CSYNC interfaceread more on this schematic here.

Remember I haven’t tried these schematics myself, I’m just referencing them to help you get the info. To get the full insight you should follow the links provided. Good Luck on your LCD to VGA interface.

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