|
18 Bit ADC uses PC's Serial Port - 09/27/01 - EDN-Design Ideas: A
PC usually requires a plug-in ADC card to process analog signals.
However, with circuitry in Figure 1, a PC can communicate with an
18-bit ADC through its serial port. port provides both positive and
negative power supplies as well as control signals. IC1 is an 18-bit
MAX132 ADC with a serial interface. / (schematic) |
|
25-Pin PC Serial Port to MIDI Synthesizer Interface Cable -
(electronic circuit) |
|
27MHz USB Dongle - (application / block diagram) |
|
9 to 9 Pin Female Null Modem Cable - (Tony van Roon's circuit /
schematic design) |
|
9-Pin PC Serial Port to MIDI Synthesizer Interface Cable |
|
A Practical Guide to Cable Selection - National Semiconductor
Application Note (app note) |
|
A Serial Infrared Remote Controller - (electronic circuit) |
|
Accurate USB 2.0 temperature Sensorneeds only a handful of parts -
05/24/07 - EDN-Design Ideas: A USB-to-serial converter forms the heart
of an accurate USB temperature sensor.....(design idea) |
|
Add Current Boost to a USB Charger - 09/19/02 - EDN-Design Ideas:
The popular USB interface can charge a portable device while
transferring data. But for high-capacity batteries, 500-mA output
current of USB hosts and powered hubs greatly extends charging time. (Unpowered
USB hubs supply no more than 100 mA.)Thus, a system that accepts
charging power from an ac adapter as well as.....(design idea) |
|
Advanced Topology USB Battery Charger Optimizes Power Utilization for
Faster Charging - DN336 Design Notes (Linear Technology) (app note) |
|
An Adjustable Video Cable Equalizer using the LT1256 - DN92 Design
Notes (Linear Technology) (app note) |
|
An Introduction to USB Descriptors: With a Gameport to USB Gamepad
Translator Example - Microchip Application Note Published 4-May-04
(app note) |
|
AN1003: USB Mass Storage Deviceusing a PIC MCU - Microchip
Application Note Published 30-Aug-05 (app note) |
|
AN-1088: LVDS Signal Quality: Cable Drive Measurements using Eye
Patterns Test Report #3 - National Semiconductor Application Note
(app note) |
|
AN-1347: PCB Layout Techniques for Adaptive Cable Equalizers -
National Semiconductor Application Note (app note) |
|
AN240 EP9312 USB Version 1.1 Slave Reference Schematic - (app note) |
|
AN255 Populating the USB Components on the EDB9301 Development Board
- (app note) |
|
AN258: Low Cost USB Microcontroller Programmer the Building of the
Pickit 1 Flash Starter Kit - Microchip Application Note Published
7-Jul-03 (app note) |
|
AN-916: A Practical Guide to Cable Selection - National
Semiconductor Application Note (app note) |
|
AN950: Power Management for PIC18 USB Microcontrollers with Nanowatt
Technology - Microchip Application Note Published 19-Nov-04 (app
note) |
|
AN956: Migrating Applications to USB from RS-232 UART with Minimal
Impact on PC Software - Microchip Application Note Published
3-Dec-04 (app note) |
|
AN971: USB Port-Powered Li-ION/Li-Polymer Battery Charging -
Microchip Application Note Published 31-Jan-05 (app note) |
|
APC Back Pro UPS cable -
.(circuit design) |
|
APC Dumb UPS cable (simple) -
.(design added) |
|
APC Smart UPS cable -
.(circuit design) |
|
APC Smart UPS interface port -
.(electronic schematic) |
|
Apple Mac to MIDI Synthesizer Interface Cable - (electronic circuit) |
|
AVR In-System-Programmer - USB AVR programmer that supports a lot of
AVR microcontrollers.
.(circuit design) |
|
Bit Wacker - 18F2550 - This is an easy to assemble, through-hole
version of the popular UBW board. This is a spectacular little
development board featuring the PIC18F2550. Based on the work of Brian
Schmalz, the UBW is a small board with a command interpreter for basic
input and output control. When attached to a Windows/Max OS X/Linux
computer, the UBW will show up as an RS232 Com port! You control the
individual I/O pins on the PIC through simple serial commands. This is a
kit and includes a pre-programmed 18F2550 and both male and female
connectors so you can choose which connector you would prefer.
.(design) |
|
Bit Whacker - Simple input / output device - The UBW board is a
small board that contains a Microchip PIC USB-capable microcontroller,
headers to bring out all of the PICs signal lines (to a breadboard for
example), only costs about $15-$20 to build and is powered from the USB
connection. I designed this board to be a simple parallel port
replacement tool for Bruce Shapiro for use in his bits-to-bytes-to-bots
class. Apologies to all other 'Whacker' projects like EDTP's Packet
Whacker for stealing a great name . All tools used to design this
project are free, and the design is open to anyone to use for whatever
they wish. Please build your own and improve upon it!
.(design) |
|
Build a UPS for USB devices - 04/11/02 - EDN-Design Ideas: Portable
systems often include circuitry that derives power from an external
source, such as USB. When system disconnects from USB supply, a
battery takes over and supplies current via a dc/dc converter. A
diode-OR connection (Figure 1)offers easiest way to ensure that supply
voltage doesn't sag during this switchover to battery. |
|
Build a USB based GPIB controller - 12/16/05 - EDN-Design Ideas:
Roll-your-own USB-based instrumentation bus.....(design idea) |
|
Cable Finder Seeks Out Wall Conduits |
| 05/11/00 - EDN-Design Ideas: (design
idea) |
|
Cable Tester - (electronic design) |
|
Casio QV-200 Digital Camera Cable. - Lose your cable? Build it
yourself and save $29. Fits many QV models. |
|
Centronics Port Generates Narrow Pulse Widths - 08/02/01 -
EDN-Design Ideas: Variable-pulse-width signals are useful in control
circuitry for positioning and holding purposes in robotics and power
electronics. Frequently, need arises for pulses with width less than 1
msec. Delays less than 1 msec are usually not available in most
programming languages, so generating such pulses can be a
problem |
|
Circuit charges supercapacitors to 7V from USB power - 04/26/07 -
EDN-Design Ideas: Switching regulator charges three supercapacitors
with current limit |
|
Circuit compensates system offset of a load cell based balance -
08/16/07 - EDN-Design Ideas: A dual DAC stores the system-offset
voltage, which gets determined during a power-on calibration
sequence) |
|
Color Video Travels on twisted Pair Cable - 08/17/95 - EDN-Design
Ideas: This circuit transmits video anywhere phone lines exist.
Although the circuit has more electronic components than the traditional
single amplifier used to drive a coax cable, you can easily justify the
additional electronics required to drive twisted-pair cables) |
|
Commonly Used RS-232 Serial Port Cables |
|
Connect RS232 modem to E-10G - Here is the instructions to build a
cable adaptor to connect your pocket PC with any external RS232
modem. The Pocket PC must have serial port.
.(electronic schematic) |
|
Connecting Sega 3d Glasses to a PC Serial Port - (circuit /
schematic) |
|
Control stepping motor via USB interface - This is an example that
demonstration how to control some devices via USB interface.The PC
software program with delphi. Feature: - CPU PIC18F4550 with full speed
USB interface at 48MHz. - USB 2.0 compliance - Use on-chip USB driver
...(schematic) |
|
Current-Limited DC/DC Converter Simplifies USB Power Supplies -
DN252 Design Notes (Linear Technology) (app note) |
|
Data acquisition system captures 16 bit voltage measurements using the
USB - 05/25/06 - EDN-Design Ideas: USB interface simplifies
PC-based data capture system.....(design idea) |
|
Data acquisition with PIC18F4550 - This project is simple and small
component count USB data acquisition or USB DAQ. The main core of USB
device is PIC18F4550 .The firmware for PIC modified from Microchip CDC
library. When connect this USB Data acquisition with PC then windows ask
for driver after driver installed(only first time) you will have a new
COMx if not connect the COMx not create by Windows.
.(circuit design) |
|
Demonstrating the Soft Detach Function: With a PS/2ฎ to USB Translator
Example - Microchip Application Note Published 4-May-04 (app note) |
|
Designing USB 2.0 Interface using PI3USB20 Switch - Pericom
Semiconductor Application Note # 067 (app note) |
|
Drawing Power from a PC Serial Port - This circuits derives fairly
low power, (mA at5V) from a RS-232 serial connection. (NOTE: ASCIII
drawing) |
|
DS1820 PC Thermometer - This is a digital thermometer based on USB
PIC16C745 microcontroller from Microchip and DS1820 sensor from Dallas
Semiconductor. Temperature readings are sent over USB port in HIDCOMM
USB mode to VB6 program on a PC. Hex program and sample Visual Basic 6
application is included.
.(circuit design) |
|
DSerial RS232 cable - This is a simple cable to connect your DSerial
to any other device with an RS232 port. (circuit) |
|
Dual Voltage Regulator meets USB Power needs - 08/19/04 - EDN-Design
Ideas: This Design Idea stems from the limited availability of IC
voltage regulators that can meet key USB-power specs, coupled with the
need for turn-on sequencing and rise-time control at each output. As
always, for PC-related designs, minimum cost is a primary motivation.
USB specs require all loads to limit inrush current to less than 100 mA
plus 50 ตC of charge when powered.....(design idea) |
|
Dynamic siphon steals current from USB port - 12/15/06 - EDN-Design
Ideas: (design idea)Make maximum use of a USB port's
current-delivery capability. |
|
Efficient All-In-One USB Power Management IC Solution - DN1008
Design Notes (Linear Technology) (app note) |
|
Firmware Library Errata - Microchip Application Note Published
18-Aug-05 (app note) |
|
Flash Drive - (application / block diagram) |
|
FT232 USB Interface Adapter - Control up to three devices from a PC
with FT232 IC (USB to Serial UART) from Future Technology Devices
International FTDI. Circuit is simple and does not require external
microcontroller or any type of firmware programming. PC control software
written in VB6 is included.
.(electronic schematic) |
|
General purpose components implement USB based data acquisition system
- 06/26/08 - EDN-Design Ideas: A serial ADC communicates with a PC's
USB port through a serial-to-parallel converter and a USB-interface
IC.....(design idea) |
|
Hardened Ethernet cable goes underground - 02/02/06 - EDN-Design
Ideas: How to environmentally "harden" a Category 5
UTP(unshielded-twisted-pair)cable.....(design idea) |
|
Hi-Fi USB Audio DAC - Regulator: This board supplies DAC board with
+/- 15V for analog section. MUR860 in rectifier bridge, LM317 and Lm337
as regulator IC's and BG-STD at the output. LM317, LM337 power supply
PCM2702: A little modified version of ....(circuit) |
|
Hi-Fi USB Audio DAC with PCM2702 - The heart of this circuit is
low-cost 16-bit Philips DAC. As a SPDIF decoder was chosen Cirrus Logic
CS8412 IC with SN75179 as an input driver....(circuit) |
|
Hints and Kinks for USB Decoding - 05/07/02 - EDN-Design Ideas: The
USB is a serial data-transmission system that uses cables to connect
peripheral equipment to PCs. All new computers have two or more USB
receptacles, and the predictions are that they will replace most of the
legacy receptacles on older PCs. The 1.0 and 1.1 standards for USB were
for 1.5 and 12 Mbps at lowand full-speed rates, respectively.....(design
idea) |
|
How to Construct Garmin GPS Receiver Interface Cables - (electronic
circuit) |
|
How-to build an USB device with 18F4550 or 18F2550 - (project) |
|
I/O interface board for PC - (electronic circuit) |
|
IgorPlug-USB (AVR) Universal USB interface - Yes!!! now its possible
to connect an AVR microcontroller direct to USB port of PC, running
windows. This circuit is infrared (IR) receiver.
.(design) |
|
Interface Cable for Casio Qv-200 Digital Camera - Lose your cable?
Build it yourself and save $29. Fits many QV models. (electronic circuit) |
|
Interface MIDI instruments to a PC through a USB port - 04/17/08 -
EDN-Design Ideas: You can interface MIDI-equipped musical
instruments to a PC via a USB port.....(design idea) |
|
iPOD Charger - The circuit's pretty simple, basicly it's just a
voltage regulator. Both the LM317 and the REG1117A (LDO) fit the PCB,
maybe there are even more types that I'm aware of that can be used on
it. I did add one extra thing: a LED that shows if the connected device
is consuming power. To do this I used a shunt resistor and a current
converter. I choose 0.2 ohm for the shunt, since it's not hard to come
by and should only drop 0.1V @ 500mA. Either an INA168 (current output)
or an INA193-198 (INA194 is best in this case) (voltage output) will fit
as current converter. The trip point at which the LED should start to
burn can easily be adjusted by one resistor (in case of the INA168) or
by two (in case of the INA193-198). In the schematic it is set at 100mA
using an INA168 using a 950k resistor. The Schmit buffer is a Texas
Instruments Little Logic chip (1G17).
.(electronic schematic) |
|
Laptop Computer Serial Port Power Booster - (schematic / circuit
design) |
|
LCD 2 USB - 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 based on the Atmel AVR Mega8 CPU and
does not require any difficult to obtain parts like separate USB
controllers and the like.
.(circuit design) |
|
LED Light - A simply and easy-to-make circuit, useful when working
with the computer at night. (6/08/2006) |
|
LED Load - The board supports driving two separate tri-color LEDs.
More can be setup inline if desired. Currently the software only uses
the second LED and its color represents the CPU load of the system in
real-time. Blue for idle and gradients light blue, green, yellow,
orange, and finally red indicating heavy CPU utilization. If the system
fails to respond, the LED begins flashing RED to indicate a lack of
communication from the software. This lets you easily identify a crashed
machine in a rack for example.
.(design) |
|
Link Neatly Measures Temperature - 10/26/00 - EDN-Design
Ideas:.....(design idea) |
|
LM1823 High Quality TV Video I.F. Amplifier and Synchronous Detector for
Cable Receivers - National Semiconductor Application Note 09 Apr1996
/ (app note) |
|
Low Cost USB Microcontroller Programmer the Building of the Pickit 1
Flash Starter Kit - Microchip Application Note Published 7-Jul-03
(app note) |
|
LVDS Signal Quality - National Semiconductor Application Note (app
note) |
