LM3909 LED flasher - LED flasher with the LM3909 IC and runs from1.5-Volt battery. __ Designed by Tony van Roon VA3AVR Logic analyzer pushes microcontroller to its limit - 12/07/00 EDN-Design Ideas - A simple logic-analyzer design is compatible with all versions of Windows and pushes the PIC 18C252 chip to its speed limit to achieve a 1-MHz sampling rate (Figure 1) . The circuit can examine three channels of relatively low-speed logic signals that have infrequent, or sparse, transitions. The analyzer can record only 510 transitions per run, but a run can last as long as several minutes, if necessary. Applications include monitoring the I/O of an IBM keyboard or printer port, TI-calculator intercommunication, and serial (RS-232) signals Design by Tom Lyons Fisher, Inexpensive Systems, Huntingdon, PA, and Michael Deskevich, Juniata College, Huntingdon, PA-December 7, 2000
Look-up table helps bit flipping - EDN-Design Ideas - May 03, 2001 In certain instances in embedded software, a programmer needs to flip the order of the bits in a byte so that B 7 to B 0 become B 0 to B 7 . Bit flipping is useful, for example, when a synchronous serial port does not allow programmatic selection of bit order, such as MSB first or LSB first, for its shift register. Design by Brad Bierschenk
Loudspeaker Protector & Fan Controller - Install it in the Ultra-LD Amplifier and protect your speakers against output stage faults. The fan control is a bonus.__ SiliconChip
Low Cost 1HZ 10MHz Function Generator - Direct Digital Synthesis (DDS) makes it very easy to design a low-cost, high-performance function generator - one of the handiest pieces of test gear you can have. This one can be set to any specific frequency between 1Hz and 10MHz and offers both sine and square wave output.__ SiliconChip
Low cost Atmel in-system Programmer - I found the schematic of this programmer in my "AVR software and technical Library - April 2003" CD-rom and decide to publish it. The reason was, that this programmer is very stable and works perfect with AVR Studio 4. I had tested it before published it, with AT90s2313 and its worked fine!!!
To work this programmer you must to connect a crystal 4MHz to slave device at the XTAL1 and XTAL2 pins, or if you have an device with internal oscillator (AT90S2343, ATmega161 etc) and its enabled , its not need any external oscillator. __ Designed by © Vassilis Serasidis
Low Cost Dynamic VID Power Supply for Pentium® III Processors - Design Solutions 7 Design Notes__ Linear Technology/Analog Devices
Low Cost Very High IP3 Low Noise Amplifiers Cover 250MHz to 2300MHz - Application Note__ MiniCircuits.com
Low cost video Motion Detection - This device uses a PIC16F819 and an LM339 to detect motion on a video signal. The incoming video is 'clamped' using one section of the LM339, the sync tips are detected with another section, and a 3rd section can detect VBI or other data. __ Designed by Luhan Monat-Mesa Arizona
Low-Cost Analog On-Off Controller - Have you ever wanted to control a device based on an analog signal level? Perhaps you want to fill a water tank automatically or control exhaust fans based on humidity or temperature. Well now, you can - provided you have a sensor that gives an analog voltage or current output.__ SiliconChip
Low-Cost AVR Programmer - To program some AVR microcontroller unit (MCU) you will need an AVR programmer. The better way to do that, is to buy some development kit like STK-500. This kit have the advantage to give you serial port, LCD connector, SRAM socket, 8 switches, 8 LEDs, connectors for all of the ports of MCU and more, to one board. I suggest to beginners, to start working with STK 500 or some else development system, it will help them very much. For the people that are want to program only one piece of AVR, to make some circuit from this site and they don't want to spend money for any development kit, the solution is this ultra low-cost AVR programmer.
Low-cost programmer for dsPICs & PICs - This low-cost unit can program all dsPIC30F series microcontrollers in the DIP package, along with most PIC microcontrollers. It's easy to build and uses standard parts.__ SiliconChip
Low-Cost PWM Module for Arduino or Development Kit with Mcu - This short article describe simple circuit capable to convert a TTL/CMOS
PMW signal to analog signal. The circuit can be used as extension shield for Arduino, with simple MCU or with TTL/CMOS
...__ Electronics Projects for You
Low-Power timer - Low power timer. It can operate with a CR2032 lithium battery. __ Designed by The Electronic Lives Manufacturing-presented Chan
Low-Voltage Remote Mains Switch - This circuit allows a 240V mains appliance to be controlled remotely via low-voltage cabling and a pushbutton switch. The mains appliance (in this case, a light bulb) is switched with a suitably-rated relay. All of the electronics is housed in an ABS box located in proximity to the appliance. The pushbutton switch and plugpack are
Low-voltage reset operates below 2.7V - EDN-Design Ideas - March 26, 1998 [ NOTE
: File has multiple design, scroll for this one.] New personal digital assistants, pagers, and other battery-powered systems operate at or below 2.7V, but power-on resets with thresholds below 2.6V are not commonly available. You can resolve this problem using a circuit that combines a 1.2V reference and a micropower regulator (Figure 1a) . IC1 integrates these two functions in a tiny SOT-143 package. Design by Bob Kelly, Maxim Integrated Products, Sunnyvale, CA
LP Doctor - Clean up the clicks & pops on your vinyl records with the LP Doctor__ SiliconChip |