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12 Dec 2007


One tool for 6 different applications: soldering, melting, hot cutting, welding, shrinking and woodburning (pyrography) Specifications:

  • Heat-up time: less than 25 seconds
  • Maximum temperature: 550ºC (tip end)
  • Recharge time: 10 seconds
  • Run time: 90 minutes

DREMEL VersaTip Gas Soldering Iron Torch Kit – [Link]

12 Dec 2007


 avrprojects.net writes:

This EEPROM programmer reads, writes and erases I²C 24C EEPROM devices. It has a PC serial port interface. The programmer needs 5VDC power supply. It can read or write one page (16 bytes) at a time by programming the page with a terminal program such as hyperterminal, no external software is needed to read or write to the EEPROM.

I2C EEPROM Programmer – [Link]

12 Dec 2007


That’s a pretty interesting implementation of a RGB led fader using timer 555 and 4029 digital IC. Project includes Eagle PCB.

bit-tech.net writes:

This is a little eye-candy circuit which continuously cycles an RGB LED through the colours of the rainbow. The speed at which the colours change is adjustable. The circuit has two options:

  • Switch between the different colours. This makes the effect very noticeable.
  • Have the colours fade into each other. This is a more relaxed effect and one I find very pleasing. The choice is yours.

RGB led controller using 555 – [Link]

12 Dec 2007


 avrprojects.net writes:

This board is a small controller board on which you can build your projects. It is suited for educational use, experiments or prototyping. The board uses the AT2313 microcontroller with a 10Mhz crystal. The board contains the ISP 10-pin connector for in circuit serial programming. It has also a push button reset switch for resetting the microcontroller.

ATTiny2313 Project Board with RS232 – [Link]

12 Dec 2007


 avrprojects.net writes:

With this small board you can program most of the AVR ATTiny microcontrollers or you can build your projects to use it in a stand alone application. It can be powered with a 9V battery because it has 5V voltage regulator on it. The voltage regulator can give 1000mA current. The power to the board can also be supplied with a wall wart. Low power external devices like a LCD module can be powered via the board itself.

ATTiny Program/Project Board – [Link]

10 Dec 2007


image source

led.linear1.org writes:

The basic theory here is to use an LM317T adjustable voltage regulator with a current programming resistor to get a constant current source to drive the Luxeon Star/O safely. The circuit itself is pretty simple, and is just a minor variation on an application found in the LM317 datasheet.

A cheap, current-regulated Luxeon Star driver design – [Link]

10 Dec 2007


What is an oscilloscope, what can you do with it, and how does it work?

For those makers who have had little experience in working with oscilloscopes and would like to learn more about them, check out these tutorial sites.


10 Dec 2007


Jermington posted his latest SCP100Barometer project in AvrFreaks. For this project he used SCP barometer and DX160 connected to Atmega8 microcontroller. Graphical LCD displays latest 128 readings while one reading occur once in 20 minutes. So totally you can see information of about two last days.

Zipped project files and schematics can be downloaded from here.

SCP1000 barometer logger with graphical LCD – [Link]


10 Dec 2007


The u-disp is an Open Sourced 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 collect 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).

U-Disp – An open source USB display – [Link]

8 Dec 2007


Mark designed a very nice micro-amplifier based on LM4780 IC which is a 60W stereo power amplifier. His design consists of two boxes. One for the main amplifier and another for the power supply. He also included a thermal shutdown feature. Complete schematics and design photos can be found on his site below.

LM4780 Micro-Amplifier – [Link]





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