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DC Power Supply
Build a simple DC supply having three output terminals: regulated +5VDC, unregulated +10VDC and 7.5VAC. The supply is suitable for microcontroller experimenting. __ Designed by Wichit Sirichote
DC Voltage & Current Source
A reference volatge and current source for testing data converter and analog amplifier. A simple circuit built with TI LinCMOS
opamp, TLC254C provides multiple outputs: +2.5V, 0 to +2.5V and 0 to 250uA. The circuit is operated with 9V battery. __ Designed by Wichit Sirichote
DDS IC plus frequency-to-voltage converter make low-cost DAC
02/05/04 EDN-Design Ideas Precision DACs are essential in many consumer, industrial, and military applications, but high-resolution DACs can be costly. Frequency-to-voltage converters have good nonlinearity specifications—typically, 0.002% for the AD650—and Design by Noel McNamara, Analog Devices, Limerick, Ireland
Decoder Safely Drives Data-Bus Buffer
07/18/96 EDN-Design Ideas Under control of the decoder chip, a 74LS245 buffer separates the onboard data bus from the ISA bus. Figure 1 shows a common way of implementing an I/O decoder for the ISA (or similar) bus. Under control of the decoder chip, a 74LS245 buffer separates the onboard data bus from the ISA bus. If the DIR and G/ signals derive only from decoder inputs, they change state simultaneously at the beginning and end of an I/O cycle. Such behavior can cause undefined operation of the buffer with possible contention on the local or ISA bus (particularly if you use a faster version of the 245). Design by Piotr Mazur, Wikom, Warsaw, Poland
Derive an efficient dual-rail power supply from USB
06/13/13 EDN-Design Ideas Wind the transformer yourself for the voltage you need. Design by R O Ocaya
Design & build your own iPod docking station
This one goes out to everyone that has an iPod or two laying about and an itchy soldering iron and thinks that the standard USB or Firewire dock just isn't quite good enough. The tiny thirty pin dock connector on the bottom of later model iPods contains quite a few connections and we want to take advantage of all of them: audio, video, serial, USB and Firewire. __ Designed by Will O'Brien
Design a Visible Optical Link for RS-232C Communications
01/09/03 EDN-Design Ideas Embedded processor directly drives LCDThe design in Figure 1 is a visible optical link for those who need to see the transmitted data. An isolation figure ofthan 5000V is a bonus. Tests of the system used the COM input of a data-acquisition system, as well as a standard PC's COM port. The MC1489 converts the RS-232C data to TTL signals Design by Shyam Tiwari, Sensors Technology Ltd, Gwalior, India
Design an RTD Interface with a Spreadsheet
02/07/08 EDN-Design Ideas Using a spreadsheet and some simple math, you can design a linearizing interface to a non-linear RTD Design by Robert
Villanucci, Wentworth Institute of Technology, Boston
Design Considerations for RS-232 Interfaces
DN27 Design Notes__ Linear Technology/Analog Devices
Design PCB
Single-side PCB for Easy-Downloader V1.3 by Dr. Homayoun Daneshgar M. D. __ Designed by Wichit Sirichote
Desktop Power Supply
Useful for electronics hobbyists, this linear workbench power supply converts a high input voltage (12V) from the SMPS of a PC into low output voltage (1.25 to 9 volts). An adjustable...__ Electronics Projects for You
Desktop Power Supply from a PC
This ATX PS board has leads for +5 (RED) , -5 (WHITE) , +12 (YELLOW) , -12 (BLUE) volts, Ground (BLACK) and switch (GREEN). Dell power supplies manufactured between 1996 and 2000 do not follow the industry standard pinout and color codes. The fan has also been unplugged for better viewing. Since this PS was converted for use in the logic and robotics labs, the selected voltages __ Designed by Andy Batts
Device to Monitor the power supply voltages of Commodore computers & warn if they are out of spec
The circuit is divided into three sections for the different warning functions __ Designed by Kevin Koster
Device Will Never Let You Forget Your Password -- it's Your Heartbeat
13-Nov-14 -Design News: Elizabeth MontalbanoBiometric identification for access to devices is nothing new, but a Canadian company has put a new spin on the technology by using people’s heartbeats to allow them to wirelessly access their devices -- including their smartphone, computer, car, or even their home. Bionym , founded in 2011 as a __ Gadget Freak
Different Programs In the Chip using a PIC16c508
Scroll to find this circuit #3Up to 5 different programs can be burnt into a single '508A and the required program can be accessed by soldering a resistor between one of the outputs and the "input-only" lineGP3, as shown in fig: 4.
During turn-on, a special program will put a HIGH on each output in turn and the output containing the resistor will determine the program. __ Contact: Colin Mitchell
Differential-To-Single-Ended Converter
03/14/96 EDN-Design Ideas The circuit in Figure 1 addresses applications in which you need to convert a differential-current output to a single-ended voltage. Several analog modules, such as the MC1495 multiplier and the LM1596 modulator/demodulator, provide differential-current outputs. You can adjust R5 to adjust the voltage gain over the range of 5 to 201 to accommodate your application(added 07/08/09] Design by Hooman Hashemi, National Semiconductor Corp, Santa Clara, CA
Digital Audio/ Video Input Selector
Need to connect more than one audio-video (AV) source to your colour television? Don’t worry, here’s an AV input expander for your TV. It is inexpensive and easy to construct. The working...__ Electronics Projects for You
Digital Audio/ Video Switch
8 channel switch. __ Designed by Peter Jakab
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