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Power Reboot Circuit - Simple circuit for booting the PC base linux server. . . . [Wichit Sirichote, designer]
Power Solutions for Flexible
MotherboarDSAN-6 - Application Note 6. . . [Microsemi
Corp]
Power Supplies for Subscriber Line Interface Circuits - DN130 Design Notes (Linear Technology) . . . [Linear Technology]
Power Supply Converted from a
PC link - 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 . .
. [by Andy Batts]
Power Supply-Basic UPS - This circuit is a simple form of the commercial UPS, the circuit provides a constant
regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply line failure the
battery takes over, with. . . Andy Collinson
Powered AA Nimh & NiCd Battery
Charger - The charger in this project is designed to
charge two AA NiMH or NiCd cells of any capacity (as long as they are the same) at about 470mA. It will charge
700mAh NiCds in about 1. 5 hours, 1500mAh NiMHs. . . . [Stefan Vorketter]
Powered
Speakers - STMicroelectronics-Application. . .
Powerpc's On Chip Debug Features Alter Embedded Development
- 11/07/96 EDN Design FeatureAlthough best known for high performance, the
PowerPC family adds a new dimension to embedded-system development. . . . [by Jim Challenger, Software
Development Systems]
Practical Limits of RS485 - Application Note 05 Oct1998 / . . . [National Semiconductor]
PreAmplifier Computer
Microphone - This circuit was submitted by Lazar Pancic
from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line
inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to 600 ohms.
Lazar has adapted the sound card to use a common electret microphone using this circuit. . . [Andy Collison's
website]
Precision level shifter has excellent CMRR - 04/15/04 EDN
Design Idea Most designers make level shifters with op amps and 1%-tolerance discrete resistors.
Discrete-resistor mismatching limits the op amp's CMMR (common-mode rejection ratio] to 40 dB, so you cannot use
op amps in circuits that require h. . . [by Ronald Mancini, Texas Instruments, Bushnell, FL]
Precision peak detector uses no precision components - 10-Jun-04 EDN Design Idea When you need a precision peak detector, you would usually
implement it with one or several op amps and a few other associated components. This technique usually works well
unless your design requires operation higher than a few k. . . [by Jim McLucas, Longmont, CO]
Preprocessor for rotary encoder uses PAL - 08/02/01 EDN Design Idea Rotary encoders usually provide quadrature pulses that indicate
both the amount of rotation and the direction (Figure 1). A microcontroller can calculate the rotation direction
and keep track of angular movement. Many microcontroller. . . [by David Rathgeber, Alles Corp, Toronto, ON,
Canada]
Printed Circuit Board Drill - Computerized PCB Mill. . .
Printer
port activates CMOS switches - 05/02/02 EDN Design Idea
The cost-effective design in Figure 1 provides control for CMOS switches without the need for an external power
supply. Analog switches such as those in the MAX4663 are ideal for use in low-distortion applications. They are
preferab. . . [by J Jayapandian, IGCAR, Tamil Nadu, India]
Printer Port Controls A/D Conversion - 12/19/96 EDN Design Idea The circuit in Figue 1 uses a microcontroller (PIC16C71] as an
A/D converter and a data organizer. The circuit plugs directly into a PC printer port and needs no external power
supply. Under the control of the Borland C program in. . . [by Yongping Xia, Philips Lighting Electronics Co,
Torrance, CA]
Printer Port Controls Amplifier's Gain - 10/26/95 EDN Design Idea The circuit in Fig 1 lets you use a PC's printer port to set the
gain of an inverting amplifier. The circuit uses a 4-to-1 analog multiplexer, IC1, to select a pair of external
resistors. The multiplexer's connection scheme ensur. . . [by Bogdan Manolescu, Gunicom Professional, Bucharest,
Romania]
Printer port controls reference generator - 09/28/00 EDN Design Idea Figure 1 shows a programmable, precision reference-voltage
generator. A PC's printer port controls the generator. The voltage range is 0 to 4. 0955V in. . . [by Yongping
Xia, Teldata Inc, Los Angeles]
Printer Port hosts precision analog I/O board - 02/02/95 EDN Design Idea The 12-bit analog I/O board in Fig 1 plugs into a PC's printer
port. Thus, you can move the board around your laboratory more easily than you can exchange A/D boards that plug
into the PC's backplane. The board handles eight 1-kH. . . [by Huw Jones, Gyrus Medical Ltd, Cardiff, Wales, UK]
Printer Port Records
Digital Waveforms - 06/18/98 EDN Design Idea (File
includes several circuits - scroll to find this one)To record or capture special waveforms, those that appear
once or have no fixed frequency, the usual technique is to use a logic analyzer or a storage oscilloscope.
However, these tools are very expensive. Moreover, because of limited memory, a storage scope can record fewer
than 1000 samples. The technique presented here provides an alternative method to recording digital waveforms.
The idea is to use the PC's printer port to sample waveforms, and the PC's memory to store data. . . . [by Dean
Shen, Dycam Inc, Chatsworth, CA]
Pro to Consumer Interfaces - AS012 Application Note. From +4dBu balanced output to -10dbV consumer equipment input (app
note 6/07) . . . [Jenson Transformers]
Process Monitoring
and Operator Interface Software for µMACs - Scroll to find
this circuit. . . [Analog Devices-Analog Dialogue by Green, Doug]
Process Signals
from Millivolts to ±10 V Directly with a Single-Supply 3-/5-V Charge-Balancing A/D Converter - Scroll to find this circuit. . . [Analog Devices-Analog Dialogue by O'Grady, Albert]
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