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Last Updated on: Thursday, November 30, 2017 07:38 AM


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

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. __

Data-acquisition system captures 16-bit voltage measurements using the USB 05/25/06  EDN-Design Ideas The USB has become the interface of choice for connecting to PCs.  Available on all relatively modernPCs, the USB offers a standard connector and can supply power to peripheralsat 5V and as much as 100 mA of current.  The circui__ Circuit Design by Terry Millward, Maxim Integrated Products Inc, Blonay, Switzerland

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. __

DSerial RS232 cable This is a simple cable to connect your DSerial to any other device with an RS232 port. __

Dual-voltage regulator meets USB-power needs 19-Aug-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 C of charge when powered on__ Circuit Design by Wayne Rewinkel, National Semiconductor, Phoenix, AZ

Dynamic siphon steals current from USB port 12/15/06  EDN-Design Ideas Make maximum use of a USB port's current-delivery capability__ Circuit Design by Donald Schelle, Maxim Integrated Products Inc, Sunnyvale, CA

Efficient All-In-One USB Power Management IC Solution DN1008 Design Notes___ Linear Technology/Analog Devices

Emissions killers trap common-mode currents 03/02/98 EDN-Design Ideas NOTE : Contains multiple circuits, scroll for this one.  An unshielded twisted-pair cable that is transformer-coupled to a digital system can easily act as a radiating antenna, not because of the differential analog signal the cable carries, but because of common-mode currents induced by unwanted stray coupling from the digital portions of the system.  These currents from fast digital transitions contain harmonics in the hundreds of megahertz and can be a nightmare to design engineers who have to make systems conform to radiated-emissions limits.__ Circuit Design by Glen Chenier, Fujitsu Network Communications, Richardson, TX

FIFO Makes Cheap Waveform Generator 12/21/95 EDN-Design Ideas The circuit in Figure 1 shows the basic configuration of a simple and inexpensive arbitrary waveform generator.  IC1s 82C54 produces the timebase for the wave table.  This IC can generate a 152-Hz to 5-MHz clock under software co__ Circuit Design by Todd Williams, Napco Security Systems Amityville, NY

FIFO provides data-width conversion 09/26/02  EDN-Design Ideas Many designs require FIFO elastic buffers to form a bridge between subsystems with different clock rates and access requirements.  However, in some applications, you need FIFO buffers for data conversion.  One example is the case in__ Circuit Design by David Lou, Ghent University, Ghent, Belgium

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. __

General-Purpose Components Implement USB-Based Data-Acquisition System 26-Jun-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__ Circuit Design by V Gopalakrishnan, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

Handy USB Breakout Box for Project Development You can build it in 10 minutes and for less than $15___ SiliconChip

Hardened Ethernet cable goes underground 02/02/06  EDN-Design Ideas How to environmentally "harden" a Category 5 UTP (unshielded-twisted-pair] cable__ Circuit Design by Philip Freidin, Fliptronics, Sunnyvale, CA

Hints & kinks for USB Decoding 02/07/02 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 orUSB 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 low- and full-speed rates, respectively__ Circuit Design by Bert Erickson, Fayetteville, NY

How to Construct Garmin GPS Receiver Interface Cables Application Note __

How-to build an USB Device with 18F4550 or 18F2550 PIC 18F4550 and 18F2550 are powerful microcontrollers including a full-speed USB V2.0 compliant interface.  With these MCU it's very easy for the hobbyist to design USB devices with very few components.  In these pages, I'm describing how to use the CDC firmware from Microchip.  It permits to emulate a serial port with a PC running Windows or Linux.  It's also very easy to build HID devices. __ Designed by Radio LocMan

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___ Vassilis Serasidis

Interface Cable for Casio Qv-200 Digital Camera Lose your cable? Build it yourself and save $29.  Fits many QV models __ Designed by Bob Blick

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__ Circuit Design by Stefano Palazzolo, Senago, Milan, Italy

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). __

iPod Shuffle 2nd generation cable See picture __


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