Serial Port A/D Converter
This circuit is a simple adapter for PC parallel port to think that there is a printer connected to computer. This adapter is useful for testing printing speed with different software and as a part of your own designs.
You can use this circuit to connect your simple circuits to the parallel port __ Designed by Tomi Engdahl
Serial Port tests Digitals
25-Jun-09 EDN-Design Ideas The circuit in Figure 1 uses a MAX232 IC from Maxim to convert RS-232 voltage levels to TTL levels(Reference 1]. A 74HC4051 from Texas Instruments lets you select any of four digital inputs and route them to the serial port(Reference 2]. Listing 1 lets you control the RTS(ready-to-send] and DTR(data-terminal-ready] pins in the serial port that selects the signal under test__ Circuit Design by Yury MagdaEDN Design Idea June 25, 2009
Siemens OP panel programming cable
Siemens OP panel programming cable to program OP7, OP17 and other siemens operator panels. PC must have a serial port to use this cable. Siemens order number: 6XV14402KH32 __
Simple Circuit Digital Oscilloscope
This is a very simple design of digital oscilloscope. The original project comes from EP 8/2004. The only difference I've made was adding RS232 to USB converter to use it with my laptop. Schematic can by found here: analogue and digital. There can be seen analogue input section with OPA2350 amplifiers and relays as voltage dividers. ADC is fast television IC, TDA8703. Digital data goes through DS89C420, via USB to PC application showing results. It is harder and harder to find RS232 connector in modern computers. That's why I decided to make this converter. I doubt there is at least one computer without USB. __
Simple Circuit Efficient All-In-One USB Power Management IC Solution
DN1008 Design Notes___ Linear Technology/Analog Devices
Simple Circuit 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
Simple Circuit Ft245 USB Oscilloscope for the PC
If you are thinking about adding a USB interface between your project and a PC, read on. Implementing USB is now easier than you think. Eddy Insam will show you how. The USB (Universal Serial Bus) provides a new way of interfacing low and medium speed peripherals to personal computers. That old workhorse, the RS232 connector, is fast becoming obsolete, even becoming absent in newly purchased PCs. __
Simple Circuit method tests cables
10/17/02 EDN-Design Ideas MOSFET serves as ultrafast plate driverEngineers have long known how to test a cable for continuity by simply connecting all conductors in series and checking with an ohmmeter. This method is sometimes impractical, however, because it cannot check for short circuits. The method shown in Figure 1 solves the short-circuit problem. Connecting__ Circuit Design by Jim Keith, Bell-Mark Technologies, Dover, PA
Simple Circuit RS232 Level Converter based on a MAX232 including Eagle PCB & schematic files
This converter comes as an aid to STK500 board. It uses the famous MAX232 for the signal level translation. It requires a 1 to 1 rs232 cable for the connection with the PC. __ AVR Projects Dim
Simple Circuit RS-232 serial port buffer
This is a simple serial port buffer circuit I designed for a friend to speed up his SLIP connection in campus computer network "TRINET" of Helsinki University of Technology. The problem in the network was that the RS232 commections from rooms to terminal server were long and made of bad quality wiring. __ Designed by Tomi Engdahl
Simple Circuit Tests Twisted-PaIR Cables
01/19/12 EDN-Design Ideas Quickly test a cable containing twisted-wire pairs and detect open or reversed pairs, shorted pairs, and shorts between unrelated pairs. Using the system shown in Fig 1, you can quickly test a cable containing twisted-wire pairs and detect open or reversed pairs, shorted pairs, and shorts between unrelated pairs. The tester consists of an active test set that plugs into one end of the cable, and a passive terminator that plugs into the other end. (An RS-449 cable is used as an example.)__ Circuit Design by Mark D Braunstein, Contel Information Systems, Fairfax, VA
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 powered from USB port and has one stereo output. You don’t need to install any driver for Windows XP and Vista, because they are already inside. This is really plug and play. __
ST-bus channel locator eases Debugging
11/06/97 EDN-Design Ideas A simple circuit(Figure 1) can locate one of 32 channels in the serial stream of an ST-bus, which is heLPFul for both debugging and monitoring. The ST-bus comprises a framing signal for frame alignment, a clock signal.__ Circuit Design by YS Tam, Canadian Marconi Co, Ottawa, ON, Canada
Supercapacitors Charged to 7V from USB Power
04/26/07 EDN-Design Ideas Switching regulator charges three supercapacitors with current limit.__ Circuit Design by Fran Hoffart, Linear Technology, Milpitas, CA
Supply 2A Pulses for GSM Transmission from 500mA USB or PCMCIA Ports
DN307) Design Notes___ Linear Technology/Analog Devices
Supply Derives 5 & 3.3V from USB port
20-Dec-01 EDN-Design Ideas The circuit in Figure 1 derives its power from a USB port and produces 5 and 3.3V supply rails for portable devices, such as digital cameras, MP3 players, and PDAs. The circuit allows the port to maintain communications while, for example, charging a lithium-ion battery. IC2 boosts the battery voltage, VBATT, to 5V, and IC3 buck-regulates that 5V output down to 3__ Circuit Design by Chad Olson, Maxim Integrated Products, Sunnyvale, CA
Test Twisted-PaIR Cables
01/19/12 EDN-Design Ideas Quickly test a cable containing twisted-wire pairs and detect open or reversed pairs, shorted pairs, and shorts between unrelated pairs. Using the system shown in Fig 1, you can quickly test a cable containing twisted-wire pairs and detect open or reversed pairs, shorted pairs, and shorts between unrelated pairs. The tester consists of an active test set that plugs into one end of the cable, and a passive terminator that plugs into the other end. (An RS-449 cable is used as an example.)__ Circuit Design by Mark D Braunstein, Contel Information Systems, Fairfax, VA
Thermocouple Interfaces to Serial Port
11/09/95 EDN-Design Ideas The circuit in Figure 1 acquires temperature data via an IBM PC serial port using a thermocouple-based sensor. The sensor is a type-K(chromel-alumel]thermocouple. When in contact, the dissimilar metals produce a potential difference that is a function of temperature. Additional thermocouple junctions__ Circuit Design by Daniel Segarra, Sipex Corp Billerica, MA |