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. IC1’s 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 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
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 __ |