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µC multiplexes six digital potentiometers - 05/11/00 EDN-Design Ideas - In Figure 1's circuit, a µC lets you adjust as many as six digital potentiometers. Like mechanical potentiometers, digital potentiometers can adjust regulator outputs or speaker volumes and act as rheostats. Available in resistances of 50, 100, and 200 kV, they let you throw away your mechanical potentiometers and the little flat-headed screwdrivers that go with them. Design by Ted Salazar, Maxim Integrated Products, Sunnyvale, CA
220v Live Wire Scanner - This simple circuit lets you scan a 220V live wire. The clock input of the IC is connected to a wire, which acts as the sensor. Here, we have used 10cm...__ Electronics Projects for You
220V live Wire-In-Wall scanner - This little circuit will help you to scanline of a 220V live wire inwall. FET gate is connected to a capacitive metal sensor (which is usually a simple metal plate). When you holdsensor close towall, LED will indicatecurrent flow around where it detectswire. Works on 9VDC __ Designed by Peter Jakab, Electrical Engineer, Engineer of Informatics |
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A Realistic Scanner for Kight Rider Models - Most people are familiar with the adventures of a certain black Trans-Am with 5000 Megabit memory. This car started life as emotionless and argumentative but by the time it smashed its way through the first episode, everybody wanted to own it __ Contact Collin Mitchell
Active Multiplexing Saves Inputs - 03/17/11 EDN-Design Ideas - Add an inverter to reduce current and diodes to route inputs to a microcontroller's inputs as needed. Design by JB Guiot, Mulhouse, France
ADC Multiplexer Expander Works Transparently - 06/20/96 EDN-Design Ideas - When you need to multiplex a large number of analog signals into an ADC—as in medical, instrumentation, and or applications—you may find it difficult to find an appropriate ADC that has enough channels to fit your system's needs. You can add external multiplexers, but se normally require additional control lines from CPU. Also, time required Design by Mark Seiders, National Semiconductor, Santa Clara, CA
Analog multiplexer uses flying capacitors - 01/22/04 EDN-Design Ideas - This design idea describes a way to increase the number of analog inputs to your microcontroller for cases in which adding an analog-multiplexer chip or upgrading to a microcontroller withinputs might be impractical. If the microcon Design by Dick Cappels, Mesa, AZ
Analog multiplexers help test ISA bus IRQs & DRQs - EDN-Design Ideas - 12/07/1995 There are 11 interrupt-request (IRQ) lines and seven DMA-request (DMQ) lines available on an ISA connector. These lines are IRQ3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15 and DRQ0, 1, 2, 3, 5, 6, and 7. For diagnostic purposes, you should equip each line with its own control circuit to set each output low, high, or in tristate mode to avoid conflicts with installed add-on boards. Design by Jerzy R Chrzaszcz, Institute of Computer Science, Warsaw University of Technology Warsaw, Poland
Analog multiplier works over large frequency range - 09/16/99 EDN-Design Ideas - Schottky-diode double-balanced mixers are common elements in analog and digital telecommunications circuits that operate at radio and microwave frequencies. Transistor analog multipliers, such as log-antilog, MOS, and variable-transconductance types, are usually limited to frequencies of much less than 1 GHz. In the circuit Design by Hubert Houtman, Consultant, Blaine, WA
Astable Multivibrator Projects - Astable or free-running multivibrators have been used in home-built amateur radio equipment for many years. The basic circuit is a two stage amplifier with AC-coupled feedback from output to input. One transistor stage is on (conducting current) __ Designed by Todd, VE7BPO
Audio Activated Recorder - ScanMate connects between your scanner and tape recorders (via the recorder's microphone or auxiliary input and its remote start jack). __ Designed by Tony van Roon VA3AVR
Buffered Input Multiplexer/ADC Driver - The LT6556 is a complete 3-channel wideband video 2:1 multiplexer with internally set gain of one. This part is ideal as an input port receiver for HD component or high-resolution RGB video products. The basic application circuit is shown in Figure 35, with 1kΩ output loads to represent subsequent processing circuitry (the__ Linear Technology/Analog Devices App Note, Mar 25th 2010
Charlieplexing At High Duty Cycle - 25-Jun-09 EDN-Design Ideas - A few articles have recently appeared describing novel ways to increase the number of LEDs a microprocessor can drive with a limited number of pins (Reference 1]. The standard multiplexing technique made popular by multidigit seven-segment displays has, in pin-scarce designs, given way to “Charlieplexing. ” Design by Luke Sangalli, Digital Designs, Melbourne, Australia
Clock multiplier circumvents PLL - 05/13/99 EDN-Design Ideas - Using a standard PLL circuit, such as the CMOS
4046B with some passive components, is a wellknown way to design a clock multiplier. Design by Jose Carlos Cossio, Santander, Spain
Compensate for wiring losses with remote sensing - 11/18/10 EDN Technical Article: By multiplexing a small ac signal on the power wires, you can infer wiring losses. Design by Jim Williams, EDN's most revered contributor, passed away in June 2011 after a stroke. He was 63.
Data Multiplexer Adds Cursor to LED Display Driver - 03/30/95 EDN-Design Ideas - A data multiplexer, IC2, enables the LED-display driver, IC1, in Fig 1 to highlight any selected digit by intensifying its brightness. This cursor function enables the use of the display for data entry as well as readout. For example, the operator of an environmental chamber can set a desired temperature by entering that value via the display. Design by Gary Sellani, Maxim Integrated Products, Sunnyvale, CA
DC Voltage Multiplier Plans - Build a circuit to boost the voltage of a DC power source using a MAX756 IC Chip. __ Designed by REUK-Renewable Energy UK website
Fast 10-Line-To-One-Line Data Selector/Multiplexer Comprises Only Two ICs - 11-Jun-09 EDN-Design Ideas - When dealing with logic operations over BCD (binary-coded-decimal] numbers, you often need a 10-line-to-one-line data selector/multiplexer. In the past, you could use the famous 16-line-to-one-line 74150 multiplexer IC. Nowadays, however, when you look at the Web sites of the renowned semiconductor houses Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia
Force/sense connection eliminates multiplexer on-resistance error - 22-Jan-04 EDN-Design Ideas - Digitally controlled gain is an everyday analog-design element. You frequently find this element in an op-amp-based, transimpedance current-to-voltage converter. When you design digital gain control into such a converter, the usual scheme is to arrange things such that a digital multiplexer selects the appropriate feedback resistor for each gain figure Design by Stephen Woodward, Marine Sciences, Chapel Hill, NC
Inductive scanner maps objects - EDN-Design Ideas - 03/18/2014 2nd prize winner in the TI LDC1000 design contest Design by Timothy Giles-2nd prize winner in the TI LDC1000 design contest 2014 |
