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Computer Cable Designs
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Last Updated on: Wednesday, October 18, 2017 05:04 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

USB 2.0 temperature sensor needs 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__ Circuit Design by Silvio Lauckner, Ismaning, Germany

USB AVR In-System-Programmer USB AVR programmer that supports a lot of AVR microcontrollers __ Designed by Klaus Leidinger , Dimitris Porlidas , Mike Henning andVassilis Serasidis on

USB 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. __

USB 2.0 temperature sensor needs 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__ Circuit Design by Silvio Lauckner, Ismaning, Germany

USB AVR In-System-Programmer USB AVR programmer that supports a lot of AVR microcontrollers __ Designed by Klaus Leidinger , Dimitris Porlidas , Mike Henning andVassilis Serasidis on

USB 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. __

USB Bit Whacker-Simple Circuit USB 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!. __

USB 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. __

USB 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. __

USB 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 0.1VAT500mA.  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). __

USB LED Light A simply and easy-to-make circuit, useful when working with the computer at night.  (6/08/2006) __ Designed by Jose Pino

USB 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. __

USB link neatly measures temperature 26-Oct-00 EDN-Design Ideas Figure 1 shows a convenient and neat way to measure temperature using the USB of a PC.  An ADM1023 IC senses the temperature, and an Anchor Chips EZ-USB.   PDF contains several circuits, scroll to find this one.__ Circuit Design by   Mary Burke, Analog Devices, Limerick, Ireland

USB Macro that combines a complete USB transaction layer with an 8051 microcontroller core and a functional block that implements the application-specific functions.  This macro was developed and is supported by Trenz Electronics for use with an XSV Board __

USB 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. __ Designed by Stefan Vorketter

USB Printer Sharing Switch I had two computers, a Mac Mini and a generic Windows computer.  Both were on different networks, but in the same room, and I wanted to share a Lexmark USB laser printer between the two of them.  I ended up making this switch to share the printer between the two computers __ Designed by Dick Cappels

USB programmer for Atmel AVR Controllers USBasp is a USB in-circuit programmer for Atmel AVR controllers.  It simply consists of an ATMega48 or an ATMega8 and a couple of passive components.  The programmer uses a firmware-only USB driver, no special USB controller is needed. __

USB Self-powered Soundcard High fidelity external USB Soundcard / USB Headphones project that can be built for your PC or Mac.  It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC.  It is a single chip digital-to-analog converter that offers two D/A output stereo channels, digital S/PDIF output and requires very few external components.  PCM2706 includes integrated USB 1.0 & USB 2.0 compliant interface controller and it is conveniently powered directly from USB connection.  PCM2706 is a USB plug-and-play device and does not require any driver installation under Windows XP and Mac OSX. __

USB Sound Card with PCM2702 Make a sound card is no more a complex issue.  If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card.  This sound card can be __ Designed by Miroslav Batěk  Prague, Czechia

USB switch You can connect one USB device like a printer or scanner on 2 computers and controlled by software __ Designed by Vassilis Serasidis

USB to RS232 Adapter with FT232 We employ two UART boards in the course, one which can be connected to the serial connector of the PC (UART-RS232) , and a second that can be connected to a USB port (UART-USB).  The former is used in the lab and is part of the standard take-home equipment.  The latter is part of the (limited!) number of take-home targets for students who are working on a Laptop without serial connector.  In both cases, communication is done with the UART module of the microcontroller.  In the case of the normal UART board, the MAX232 simply transforms the voltage levels to RS-232 standards ( 3-15V; in our case 12V, with LOW=+12V and HIGH=-12V).  In case of the UART-USB, the FT232BM transforms the UART protocol to the USB protocol.  This is transparent to the controller, which communicates over the normal TX and RX pins. __

USB to RS232 Converter Why build my own USB to RS232 converter when there are adapters already available from many suppler? The Answer is simple: Neither the strand "USB to RS232 converter" actually worked *properly* with all the devices I tried.  But, They did not seem to support ALL the RS232 lines.  The USB to RS232 converter using the FT8U232AM and a Maxim-IC MAX235 __

USB to RS232 Dongle With serial and parallel ports being phased out on new computers, hardware designers and hobbyists have no choice but to convert the USB port back to RS232 serial.  FTDI have a very nice chip that does just that, the FT232AM.  This chip converts USB to a standard high-speed serial port.  The bonus with FTDI is the drivers are already written for you.  All you have to do is design the hardware and download the serial USB drivers from FTDI's web site. __

USB to Serial Adapter RS-232 USB to Serial Adapter RS-232 Serial Port to USB The USB to Serial adapter (converter) lets you use a serial PDA, GPS, cell, etc.  with a standard USB port.  This adapter is the easiest way to add a serial port to your computer.  Many PDAs, digital cameras, GPS units, barcode scanners, and other equipment require a serial connection, and many newer computers don't have serial ports. __

USB to Serial Interface USB to serial interface is based on the powerful FT232 chip from FTDI.  It enables very easy connection of the user's application to the PC via the USB port, without necessity of any deep knowledge about the complicated USB problems.  FT232 chip is capable to transfer data at speeds up to 1M Baud in RS232 mode and up to 3M Baud in the RS485 mode.  Schematic contains the on-board serial EEPROM (93LC46) for storing the ID data (VID, PID, serial number and description strings). __

USB/TTL Serial Cable: Extension & Supplement Two years ago, I presented here the USB/TTL serial conversion cables from FTDI wonderful communication and debugging tools.  The increasingly frequent use of ARM.  must register on this site __ Designed by Published in Elecktor July/Aug, 2010

USB: a Neat Package with a Few Loose Ends 10/24/96 EDN-Design Feature  The USB for PCs can automatically configure and power peripherals.  But, as I learned in this hands-on project, early USB adopters may face a substantial system-level design effort.  They also need to carefully examine USB data-bandwidth characteristics__ Circuit Design by Design Feature by Richard A Quinnell

USB-LCD with PIC MicroController & FT232 USB LCD/VFD Controller is a HD44870 based LCD/VFD controller via USB interface.  The control command is compatible with Matrix-Orbital's LCD module.  So, you can use any MO friendly software to control this baby.  Such as LCDCThe firmware are based on David Potter's Serial LCD/VFD Display, but I almost rewrite the entire code. __

USB-PC 8-CH Power Switch PowerSwitch provides 8 bits of parallel output intended to switch e.  g.  the power supply to electronic devices.  The PowerSwitch firmware is accompanied by a command line tool for Unix to control the device.  (The command line tool can also be compiled on Windows using minGW and libUSB-win32.). __

USB-Powered Lithium-Ion Battery Charger With a maximum power rating 5.25V/500 mA, the USB power bus is a great source for charging a single-cell Lithium-Ion battery.  The circuit in Figure 1 shows how to build a USB-powered single-cell Li-Ion battery charger using National Semiconductor s LM3622 Li-Ion Battery Charger Controller. __

VHDL program enables PCI bus arbiter core 09/13/07  EDN-Design Ideas A simple VHDL program enables microprocessors or DSPs to act as PCI-bus masters__ Circuit Design by Antonio Di Rocco, Selex Communications, Chieti, Italy

Wireless Temperature & Humidity Sensor with USB this project is based on obdev's Remote Sensor example and their firmware-only USB implementation; the main change is the replacement of the analog sensors with a Sensirion SHT11 digital temperature and humidity sensor __

Wireless Temperature & Humidity Sensor with USB Interface This project is based on obdev's Remote Sensor example and their firmware-only USB implementation; the main change is the replacement of the analog sensors with a Sensirion SHT11 digital temperature and humidity sensor. __

XY Keypad uses C's Serial Port 10/10/96 EDN-Design Ideas Interfacing an X-Y keypad to a microcontroller usually uses a parallel port of 8 bits or more.  But with the circuit shown in Figure 1, a more efficient interface using a microcontroller's serial port reduces the number of connections required from eight to three.  This interface uses the MM74C922N, a National Semiconductor keypad encoder,__ Circuit Design by James Mears, National Semiconductor, Tacoma, WA


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