The Gas Guzzler Meter is an attempt at putting an immediate dollar value on your current driving techniques: a digital meter that displays exactly what you’re spending as you motor along. Stomp on the pedal and see the bucks zoom out your tailpipe faster than a NASCAR driver competing for the Nextel Cup. This device will help you impress your friends, drive responsibly, and keep those dollars in your pocket.
Gas Guzzler Meter: [Link]
The author made the project for a friend who wanted to include it into an amplifier as an extra function. The project turned out really well and it works flawless. It’s based on the ATmega8 and it uses a 4 digit 7 segments common anodes led display to show the time. The code is pretty simple, written in C, but it lacks comments as the author did not felt the need to add them.
4 Digit ATmega8 Clock: [Link]
This project will make use of the MAX6675 Cold-Junction-Compensated K-Thermocouple-to-Digital Converter. It basically takes the millivolts produced by a standard K-type thermocouple, amplifies it, and outputs it’s temperature reading. This reading is received by a microcontroller, which then displays the reading on an LCD display. This unit will be capable of reading temperatures up 1800 degrees fahrenheit.
As you can see the author of this project also used adapters for smd parts. Myself i like to work directly with SMD parts, but sometimes it’s just not possible, especially when prototyping because you always have to tweak something.
MAX6675 Thermocouple: [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]
The u-disp is an Open Source project consisting of two parts. The first part is a circuit board with eight seven-segment displays,a micro controller and an USB interface to connect it to your computer. The second part is a software that runs in the background as a Windows Service on the computer.
The software collects information from your computer and/or external sources like Digg.com, your web sites hit counter or some stock values. This information is then shown on the display(s).
At the moment this looks a bit more advanced than Bob’s Display that i was intending to build, so I’m not sure which of them I’m gonna build, but I’m gonna make one for sure. I just need to study a bit more their projects.
U-Disp - USB controlled display: [Link]
