Electronic Design Europe David Tomanek This Design idea was inspired by a requirement for a sunrise detector with low power consumption, reliable light detection, and a real sleep mode during darkness. The sleep mode of the microcontroller with a ...
19-08-2010
This multimeter was designed to measure output voltage and current in a PSU, where the current sense shunt resistor is connected in series with load at the negative voltage rail. It needs only one supply voltage that can be acquired from main PSU. ...
13-08-2010
Vassilis Serasidis Introduction. It's been passed a lot of years since my first SMS remote control. The reason I stoped developing the source code of my previous circuit was that the T10s was not available in the market sinse a lot of years. So, ...
11-08-2010
Zhihong Yu, Juno Lighting Group, Des Plaines, IL; Edited by Martin Rowe and Fran Granville Power three to six LEDs from an ac- or dc-power source and charge a backup battery. LEDs find wide use in emergency lighting because of their high efficiency ...
03-08-2010
Till Harbaum Uploading the firmware If you are familiar with Atmel programming you probably know what you are doing. The Makefile in lcd2usb/firmware/Makefile assumes, that you are using a simple STK200 compatible printer port adapter . Connect the ...
02-08-2010
Description Here is a simple circuit that can be used as a tachometer. The circuit is basically a frequency to current converter which converts the incoming signal into a proportional current to drive the meter. The deflection on the ammeter will ...
27-07-2010
This tool assists you in tuning your string instrument to a given tone. It utilizes the stroboscopic effect to give feedback about the adjustment of your instrument. The two LEDs on the board blink with the frequency that the chosen tone has. When ...
23-07-2010
Power-up Once you have a transmitter-receiver pair of devices assembled, it's time for the first test. We recommend to use a single computer for testing both devices. First, power down the computer and connect the transmitter unit between the PS/2 ...
20-07-2010
Introduction Familiar with the concept of hardware keylogging? A hardware keylogger is a perfect solution for monitoring user activity, at very low risk of disclosure. A hardware keylogger is a purely electronic device, so no access to the ...
20-07-2010
Till Harbaum Overview LCD2USB is a open source/open hardware project. The goal of LCD2USB is to connect HD44780 based text LCD displays to various PCs via USB. LCD2USB was meant to be cheap and to be made of easily available parts. It is therefore ...
19-07-2010
Description. With a matching antenna, the FM transmitter circuit shown here can transmit signals up to a range of 2 kilo meters. The transistor Q1 and Q2 forms a classic high sensitive preamplifier stage. The audio signal to be transmitted is ...
19-07-2010
Introduction: Frequency counter is a very important test instrument for Radio Amateurs, especially those who wish to develop or test circuits. There are lots of frequency counters in the market but building one was never so easy exciting with ...
15-07-2010
Compiling the firmware The ATtiny45 is quite new and thus not all parts of the development chain support this chip in their current release versions. The latest binutils (linker an assembler) and avrdude (programmer) support the new chips as well ...
15-07-2010
Attach any I 2 C client chip (thermo sensors, AD converter, displays, relais driver, ...) to your PC via USB .. quick, easy and cheap! Drivers for Linux, Windows and MacOS available. The i2c-tiny-usb project is an open source/open hardware ...
15-07-2010
Izhar Fareed Description The LP2951 regulator is manufactured by National Semiconductor . The choice of values is from an application note Battery Charging, written by Chester Simpson. Diode D1 can be any diode from the 1N00x series, whichever is ...
14-07-2010
In the first part we have considered the s chematic diagram. This is where the fun begins! If you've come this far, you should have a display that says Display Initialized when you power up the device. If you haven't done it already, download the ...
14-07-2010
What do you do with an old phone, a microcontroller and lots of time? You hook the old phone's LCD screen to the computer USB of course! In this project we're going to communicate with a Nokia 3310 LCD display over USB! How are we going to do that? ...
12-07-2010
This is a successor of the PIC16C71 4-digit LED f-counter V-meter. Some hard to find parts used in the previous version, which are out of production for some time, has been omitted. A rather early PIC16C71 has also been replaced by 28-pin device ...
09-07-2010
The complete WLAN solution for AVR and other CPUs Software The software needed to drive the SPI2CF consists of two main parts: The low level drivers needed to access the PRISM compact flash slot via SPI and a (hardware independant) TCP/IP stack on ...
06-07-2010
The complete WLAN solution for AVR and other CPUs The SPI2CF chip used in the SPI2CF demo system is based upon a cheap CPLD. The necessary WebPack ISE development system is available as a free download from Xilinx. It can therefore be used for ...
30-06-2010
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