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Simple device for
connecting serial instrument with RS485 or RS232 to the internet - The device that converts RS485 and RS232 to the ethernet LAN has been developed. The device
was built with the Lantronix XPort embedded ethernet server and the industrial standard differential RS485
transceiver, 75176 and the single-end RS232 driver, MAX232. The XPort module provides 10/100 ethernet port and
the +3V logic UART. The 75176 and MAX232 are +5V TTL logic. . . [Wichit Sirichote, designer]
Simple FSK Modulator Enables Data Transmission Over Low-Speed Link - 06/11/09 EDN Design Idea Send digital data over a low-speed link. . . [by Israel
Schleicher, Prescott Valley AZ]
Simple 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 MIDI interface Tester - Sometimes when experimenting with different soundcards and MIDI interfaces it is useful to
see if there is some data going in MIDI interface. This can be easily tested with this adapter, which converts
the midi signals to visible light pulses. Just the circuit and plug it to the MIDI output of your computer. . .
Simple Module Gives Voice to PC
- 05/26/94 EDN Design Idea The circuit in Fig 1 uses the ISD1020A voice-record/playback chip (Information
Storage Devices, San Jose, CA, (800] 825-4473] to allow an IBM PC to speak and hear. The analog part of the
circuitry comes from the company's applicati. . . [by Jerzy R Chrzaszcz, Institute of Computer Science, Warsaw
University of Technology, Warsaw, Poland]
Simple monovibrator uses three PLD pin - 09/28/95 EDN Design Idea If your design requires a precise monovibrator, you don't want to
use the circuit in Fig 1. However, if sharp timing isn't crucial and you can afford just three spare PLD pins,
this circuit is an alternative to using yet another. . . [by Jerzy Chrzaszcz, Warsaw University of Technology,
Warsaw, Poland]
Simple Mouse Smart card programmer - This "SimpleMouse" Smartcardprogrammer can be used to read and write most of all async -
Smartcards (Processorcards) , including the new "Hornet and +1" DPSC΄s in update and reprogramming mode.
. . . . [source:Keule]
Simple Parallel (Printer) Port Interface - . . . [Aaron Cake]
Simple PC Data Acquisition
Circuit - If you need to add simple data acquisition
capabilities to your PC, then look no further than the Analog Interface Unit. The Analog Interface Unit (AIU) is
a simple circuit that connects to a PC parallel port, and allows you to sample and output 8-bit analog signals
under software control. Here are some of the features : 8-bit ADC and DAC, . . .
Simple PC Thermometer - In this article building of a simple thermometer for PC will be described. The unit is
extremely simple and cheap to build. You will only need one NTC resistor, one diode and capacitor and serial port
connector. . . . [by IQ Technologies Industry, unless otherwise noted online]
Simple Printer Emulator Adapter - . . .
Simple Radio Clock for PC's - The heart of the device is a EM2S receiver module and matching antenna. The two are matched,
so a mixing a 60kHz receiver board suitable for the MSF and WWVB signals with a 77. 5kHz antenna and vice versa
will not work. It should be noted that the receiver boards know nothing about the format of time signal itself so
a 60kHz pair suitable for receiving the MSF signal will also receive the WWVB signal. . . [Jonathan A. Buzzard]
Simple RS-232 serial port buffer
circuit - . . .
Simple RS232C Level Converter
using Transistors - Cheap and easy circuit for converting
TTL logic to RS232C level using small signal transistors. . . . [Wichit Sirichote, designer]
Simple RS422 Converter for
Minilogger - Build a simple RS422 converter for the
Minilogger. . . . [Wichit Sirichote, designer]
Simple Software I2C Routine for the COP8 - Application Note. . . [National Semiconductor]
Simple stepper motor driver
for PC parallel port - . . .
Simple Technique Makes Low Cost PC-Board Shields - 02/19/04 EDN Design Idea Many pc-board assemblies require shields to reduce
susceptibility to interference from electromagnetic fields. A classic example is a radio receiver, in which the
front end usually needs high isolation from the tuning synthesizer. Historically, shields for low-volume or
low-cost applications involve trade-offs. You can't justify the cost of a custom-cast shield, and shields
machined from aluminum burn through money as fast as the end mills go dull. You can make a simple shield for just
a few dollars by using commonly available die-cast aluminum "project boxes, " such as those from Hammond
Manufacturing (www. hammondmfg. com). These boxes come in sizes from 2×2 in. to more than 7×4 in. You turn the
project box into a shield by sandwiching the pc board between the top and the bottom of the box, thus completely
enclosing the sensitive circuitry. . . . [by Steve Hageman, Windsor, CA ]
Simple Wireless Radio Data Link - This is a description of a very simple unit designed and constructed for use as a wireless
data connection between two nearby computers. The error rate is excellent over short runs, and the transmission
speed means that a useful PPP link can be established between the machines. Which are, of course, running Linux.
. .
Simplified Analog Input Schematic - This circuit is a track and hold. The idea is that the input waveform may reach a peak at
any instant as the drummer strikes the pad. When that occurs, the capacitor is charged to the peak input voltage.
There is only one A/D converter (ADC0804, see the Main CPU section schematic) , and it takes time for it to
convert an input voltage to a 8-bit code. No matter. . . [Paul Stoffregen]
Simplified
PC Connections for Gpib Instruments - Application Note. .
. [Aligent]
Simulate input-offset current for current mirrors - 06/24/04 EDN Design Idea imulating the output-offset current of a current mirror is
straightforward. You simply have to apply an input current, measure the output current, and calculate the
difference. This output-offset current, however, is not equal to. . . [by Johan Bauwelinck, Gent University,
Gent, Belgium]
Single µC pin makes half-duplex RS-232C - 08/05/99 EDN Design Idea In many µC designs, nearly all the I/O pins are occupied. If only
one I/O pin is available, the circuit in Figure 1 can help you implement a serial RS-232C interface. For many
purposes, half-duplex operation using a software-driv. . . [by Marin Ossman]
Single
Interface Chip Controls Two Smart CarDS - DN289 Design
Notes (Linear Technology). . . [Linear Technology]
Single
Supply RS-232 Interface for Bipolar to D Converters - DN29
Design Notes (Linear Technology). . . [Linear Technology]
Single wire connects
microcontrollers - 10/22/98 EDN Design Idea (File has
several circuits, scroll to find this one) Low-cost µCs, such as Motorola's 68HC705 Series, offer great
simplicity at the expense of some useful functions—notably, serial data transmission. Unlike their predecessors,
these µCs do not have serial communication interfaces (SCIs), serial peripheral interfaces (SPIs), or simple
serial I/O ports (SIOPs). This method describes how you can overcome this deficiency by creating an asynchronous
serial interface through µC software. . . [by Abel Raynus, Armitron International, Melrose, MA]
Single-wire keypad interface frees microcontroller-I/O pins - 03/31/05 EDN Design Idea Using this interface topology, you can reduce the number of
keypad interface wires to just one and thus save critical microcontroller I/O ports. . . [by Israel Schleicher,
Prescott Valley AZ]
SIO Input/Output Register Description (CB-1) - Application Note . . . [National Semiconductor]
Slave Reference Schematic - . . .
SLIO-CAN CAN-Linked I/O Based on COP884BC - Application Note. . . [National Semiconductor]
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