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rs232 with opto isolation
Even though i had isolation at the sensors and actuators to make doubly sure the PC also has been isolated. There are chips that are available for this purpose, The circuit above is built with discrete and passive components except for the opto 4N35. You can use MCT2E and CNY17-3 Optos too. For MCT2E some tweak may be needed as current transfer ra
MARES IRIS Interface schematic circuit
You need a TSOP4156 which can be a tough one to get or expensive to buy. I had plenty of old BPW41 Infrared diodes so I decided to build my own receiver. The power comes from the RS232 port, make sure you have at least 5. 5 Volts or the 4001 will not oscillate well at 3. 6 MHz (Maybe you can get it to work at 5 Volts by adjusting some components.
NMEA to RS232 Interface Board
This design is based on that of Andrew Bruno. His design appeared under the name of "bruno-if". My contribution was to provide Postscript files for a Printed Circuit Board. This circuit is quite old and goes back to the days of NMEA-0180 and 0182. Note that it is non-inverting. Its purpose was to shift the NEMA voltage levels to be RS232 compliant
When starting with Arduino, one soon has much more Arduino boards then RS232 or even USB ports on the computer. So that, it seems more useful to put the signal level converter to an external adapter than directly on the Arduino board. Usually, one has (I have) a big basket full of ATMEGA8 and ATMEGA168 with Arduino bootloaders and one idea. So I n
Simple Universal PIC Programmer circuit
This simple programmer will accept any device that`s supported by software. The circuit is based in part on the ISP header described in the SILICON CHIP "PIC Testbed" project but also features an external programming voltage supply for laptops and for other situations where the voltage present on the RS232 port is insufficient. This is done...
RS485 Communication Connectors
This article describes the Lammert Bies - Computer Interfacing (RS485). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components: RS485. Information abo. This article describes the Three Wire RS232 To R
Simple AVR Programmer
This is simple to build AVR programmer for Atmel microcontrollers from AVR family. The microcontrollers must support serial programming. AVR programmer is connected to a PC through the RS232 serial interface and can be used with the PonyProg or Avrdude software programmer. AVR programmer is quite simple and it is based on the SI-Prog from the...
28 pin pic terminal development board
A fun package full of potential projects! Development board for 28 pin PIC microcontrollers with power supply circuit, crystal oscillator circuit, RS232 port, ICSP/ICD port, 16x2 alphanumeric Supertwist LCD ..
RS232 to RS485 Converter Circuit Schematic
RS232 to RS485 Converter Circuit Schematic. RS232 to RS485 converters are mostly used in industrial and commercial environments..
18 Pin PIC Development Board with Relays
Development board for 18 pin PIC microcontrollers with power supply circuit, crystal oscillator circuit, RS232 port, ICSP/ICD port, 4 relay output, 4 optocoupler isolated inputs.
For the purpose of this project, digital signals can be communicated with computers while analog signals can`t. RS232 is the name given to your serial port. At the back of your computer, there`s many ports where you can plug things into. The RS232 port has 9 pins and looks like: At the heart of most digital oscilloscopes is a device (usually a...
Transparent Mode XBee Projects for Model Railroading
The remaining equipment is installed at the train layout`s computer interface. The interface I used here is a Lenz LI100F configured to communicate at 9600bps. Both the LI100F and the XBee Explorer serial are configured as DCE (Data Communications Equipment) devices. These devices are intended to be connected directly to an RS232 serial port on a
8051 USB PROGRAMMER
The above circuit uses RS232 for interfacing with PC. It is very simple circuit & works very well with PC. Power is drawn from usb port OR needs external supply of 5V. The value of the crystal is very critical at AT89C2051 and must be 11. 0592MHz. Here AT89C2051 is loaded with firmware required for RS232 communication with PC. Assemble the...
USB to Serial RS232 adapter circuit design electronic project
This USB to Serial RS232 adapter is very useful in many situations we need to connect a device with RS232 to a computer without RS232 port, but with USB port. Using FT232BM chip manufactured by Future Technology Devices International we can make a very simple USB to Serial RS232 adapter using few external components. FT232 driver main features
RS232 Reset for Microprocessor
This circuit allows a remote microprocessor to reset the control of a host by sending an interrupt signal on an RS-232 or RS-422 serial line. If the remote machine is restarted on a simple program loader program, it is possible that the host to stop and restart, or stop and reload / restart the program the remote machine. This is an ideal way to d
rs232 converter help
I have a 89 seris RS232 programmer but my computer has no RS232 connector so where i have to connect rs232 cable Is any converter for RS232 to usb..
lf253 Frequency counter 1Hz-100Mhz with LCD display and RS232 interface
This article continues the AT90S4433 Microcontroller series. I suggest you to read the previous articles on Atmel Microcontroller programming with regards to: This time we design a frequency counter which can measure frequencies from 1Hz to 100MHz. Alternatively you can use it also to just count events, such as how many people crossed the street (
Visual Basic & AVR RS232 interface
On this project we will control anAVR microcontroller (MCU) via Visual Basic 6. The applications of this circuit is countless. You can make, anything you want, that needs control from a Personal Computer (PC)or from anycircuit collects data from sensors. Finally, itsends these data to Visual Basic based software by using the RS232 port. You have...
RS232 transceiver circuits
There are several RS232 transceiver circuit used for commond communicated between microcontroller and other devices such as PCs or devices rs232. Here is a collection of RS232 transceiver circuits that use well-known for today. The circuit using MAX232, Maxim`s devices. This circuit is very stable and the use of professional design. This device...
DS1820 temperature sensor for WL 500gp
Hello, I`ve made a DS18S20 -based serial port temperature sensor. I would like to connect it to the usb port on my Asus WL-500gp v2. The temperature sensor works perfectly on the pc connected to a serial port directly, but I can`t get it to work with my usb-rs232 serial port adapter. I think the problem with my circuit is that the serial port...
wi fi interfacing with lpc2148 arm7 primer
Circuit shows how to interface the Wi-Fi with microcontroller. The Wi-Fi module continuously transmits or receives serial data (RS232 protocol) through internet without wires. It delivers the received data and receives the data to be transmitted to and from a host system through a host controller interface (HCI). The most popular host controller...
piclink rs232 low cost development controller with adc using pic16f628a
PicLink RS232 low cost development controller with ADC PICLink RS232 Embedded Controller The PICLink RS232 controller module affords any microcontroller en..
FPGA RS232 Serial Interface Circuit
The schematic for this project is a modified version of the CPLD dev board schematic. There are a few new parts added for this project and you can see the completed schematic for this project below. The main parts in the schematic are the CPLD Dev Board, MAX233a and 7 Segment Display. The RS232 interface circuit consists of the CPLD, it`s 25. 17
JDM pic programmer help required
For the following circuit of the JDM pic microcontroller programmer I need information about the PIC microcontroller pins which receive the RS232..
relay development board for atmega16
Development board with high power relays, opto-coupled inputs, power supply circuit, crystal oscillator circuit, RS232 port, with ICSP and JTAG ports! JTAG 5x2 pin connector for in-circuit ..
LTC1045 TTL RS-232 Converter
A simple way to build a battery-powered RS-232 receiver circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level..
CMX7031Q1 The Two-Way Radio Processor
The CMX866 is a multi-standard modem for use in telephone based information and telemetry systems. Control of the device is via AT commands over a simple 9600b/s serial Interface compatible with most types of host Controller. An RS232 compatible Interface CAN be created by the addition of a Level Converter. The data transmitted and received by the
Four Port Serial Adapter for the EB675001DIP
This application note describes the addition of a quad serial controller to the EB675001 Module. A multi source quad Universal Asyncronous Reciver and Transmitter (UART), 16554 type, was selected to ease implementation and sourcing of components. The RS232 line drivers were similarly selected. The UART is connected to the system by using the user
Usb To Rs232 Uart Serial Converter Pcb
The USB-RS422-PCB is a USB to RS422 level serial UART converter PCB incorporating FTDI`s FT232RQ USB to Serial UART Interface IC device which handles all the USB signalling and protocols. The PCB provides a fast, simple way to connect devices with a RS422 Interface to USB Each USB RS422, PCB contains a small internal electronic circuit board, utili
communicate with the picaxe
A tutorial on setting up RS232 communication to PICAXE with circuit diagram, serial cable configuration, PC communication program setup and configuration and sample code for PICAXE..
40 pin pic development board with usb
Power and serial communications are provided by the FTDI USB RS232 converter chip. You don`t have to do anything! Connect the USB cable from your computer to the board and a new serial com port will install under Windows. Also includes socket for I2C EEPROM - complete with pull-up resistors and connections to PIC pins. Perfect for basic...
40 Pin PIC Development Board
If you need lots of Analog to Digital channels, or plenty of program space (up to 32K!), this one is for you! Prototype board for 40 pin PIC microcontrollers with power supply circuit, 20MHz crystal oscillator circuit, RS232 port, ICSP/ICD programming port.