Holidays.net Online Store

Holdays.net Home


November 20th, 2014
Universal Children's Day

November 20th, 2014
Africa Industrialization Day

November 20th, 2014
World Philosophy Day

November 21st, 2014
World Television Day

November 25th, 2014
World Day to Eliminate Violence on Women

November 27th, 2014
Thanksgiving Day

November 28th, 2014
American Indian Heritage Day

November 28th, 2014
Lincoln's Birthday

November 28th, 2014
Black Friday

November 29th, 2014
World Solidarity Day with Palestinian People

November 30th, 2014
First Sunday Advent

December 1st, 2014
World AIDS Day

December 2nd, 2014
World Day for Slavery Abolition

December 3rd, 2014
World Day for Persons with Disabilities

December 5th, 2014
International Volunteer Day

December 7th, 2014
Pearl Harbor Remembrance Day

December 7th, 2014
International Civil Aviation Day

December 8th, 2014
Feast of the Immaculate Conception

December 9th, 2014
International Anti-Corruption Day

December 10th, 2014
Human Rights Day

December 11th, 2014
International Mountain Day

December 17th, 2014
First Day of Chanukah

December 17th, 2014
Pan American Aviation Day

December 17th, 2014
Wright Brothers Day

December 18th, 2014
International Migrants Day

December 19th, 2014
International South-South Cooperation Day

December 20th, 2014
International Human Solidarity Day

December 21st, 2014
December Solstice

 



Search:

Usb,serial & I2c Multi I/o, Adc, Dac And Twin Relay For Sale

Usb,serial & I2c Multi I/o, Adc, Dac And Twin Relay

Multi-Purpose I/O Board Multi-Purpose I/O Board

This is a multi purpose input / Output board that can be used directly with a PC via a USB port or with a Microcontroller either using a serial interface or I2C interface.

  1. USB interface for connecting to a PC. When connected this will present itself as a COM port and communication can commence via HyperTerminal or other terminal software (software included in the resources pack). VB can also be used using the MSComm component or indeed any program that can communicate via the COM port
  2. On board voltage regulator protects the PC from short circuits. Also when used with a microcontroller the input voltage can be up to 10V.
  3. Input connector that can accept either serial OR I2C
  4. OPTIONAL jumper to disconnect the USB chip when used with a microcontroller
  5. Standard FTDI USB to Serial chip has standard drivers for PC,MAC and Linux. The drivers are already built into Linux.
  6. Four 10 bit analogue to digital inputs with an accurate reference voltage that can be set to 1.024V, 2.048V and 4.096V
  7. Two Digital to analogue outputs that can be set to give an analogue output from 0 to +V in 63 steps.
  8. Two relays outputs up to 10A @ 250VAC and 10A 24V DC
  9. An 8 port digital switch using the ULN2803 Darlington output. This is capable of switching up to 1/2 Amp per port. and Voltages up to 50V. The o/p is pulse width modulated and so the output power can be varied.
  10. This is connected to the digital switch and can either input or output 8 channels.

Downloads:
Data sheet
User guide
Resources zip file , includes free terminal software

Serial Communication

The device is operated serially either via the USB or directly through connector (3). Initially the device will recognise the Baud rate (from a fixed set) when it receives the first carriage return. This can be 'fixed' by using the system settings. There is also an acknowledge mechanism that will enable the device to operate efficiently without connecting the hardware handshake line (CTS/RTS).

Commands are based on the VT100 command set that use escape codes. For example to turn on relay A the following would be sent to the device:

esc[1A

to turn it off would be:

esc[0A

All of the commands follow the same pattern.

I2C Communication

The device can recognise when an I2C bus is connected and automatically switch to that mode. The default address is 0x64 (8 bit) 0x32 (7 bit) but can be changed to any address within the range 2 - 0xfe by the user. When using I2C the escape codes are replaced by single byte commands.

Digital I/O

There is an 8 bit wide digital input and output port. The output is connected to a Darlington driver for driving high power devices such as motors and solenoids. The output on each channel has an independent pulse width modulation that can be varied form completely off (0) to fully on (255) in 255 steps. This could vary the brightness of lamps or speed of motors.

Analogue to Digital

There are 4 ADC channels that are continually scanned by the firmware. In addition there is a built in precision voltage reference that can be set to one of three levels, 1.024V, 2.048V and 4.096V. The setting is simply a matter of issuing a command.

Digital to Analogue

There are two analogue outputs that can be digitally controlled in 64 steps to give a range of output from 0V to 5V.


Usb,serial & I2c Multi I/o, Adc, Dac And Twin Relay

This item has been shown 18388 times.

Buy Now

Usb,serial & I2c Multi I/o, Adc, Dac And Twin Relay:
$27




High Sensitivity Opic Light Detector Sharp Is489 (100 Pcs) picture
High Sensitivity Opic Light Detector Sharp Is489 (100 Pcs)


Sst Flash Memory Sst29ee010-150 29ee010-150 Dip (10 Pcs) picture
Sst Flash Memory Sst29ee010-150 29ee010-150 Dip (10 Pcs)


New Grayhill 70-odc5a Contact And Mechanical Relay Output Module I/o picture
New Grayhill 70-odc5a Contact And Mechanical Relay Output Module I/o


13 Pieces Of Mc68701s Motorola Microprocessors. 9 Per Tube, New,  Nos. picture
13 Pieces Of Mc68701s Motorola Microprocessors. 9 Per Tube, New, Nos.


1x Nsc Mm5451n , Led Display Driver, 35-seg, Common-anode , Pdip-40 picture
1x Nsc Mm5451n , Led Display Driver, 35-seg, Common-anode , Pdip-40


Texas Instruments  Sn74123n  Ic, Mono 22ns, Dip-16 picture
Texas Instruments Sn74123n Ic, Mono 22ns, Dip-16


Honeywell R7258a 1001 Plug-in Infra-red Amplifier Nib picture
Honeywell R7258a 1001 Plug-in Infra-red Amplifier Nib


Pa28f008s5-120  Intel Flash (10pc Lots) picture
Pa28f008s5-120 Intel Flash (10pc Lots)


1x Cypress Cy7c187-45pc , Static Ram, 64kx1 , Pdip-22 picture
1x Cypress Cy7c187-45pc , Static Ram, 64kx1 , Pdip-22


Upd71082g  Nec 10 Pcs 20 Pin Plastic Sop picture
Upd71082g Nec 10 Pcs 20 Pin Plastic Sop