IR remote control command receiver with USB interface. Scheme, description

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IR remote control command receiver with USB interface. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / infrared technology

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Radio amateurs, who repeated the design of A. Zotov [1], were convinced how convenient it is, without going to the computer, to perform simple, but sometimes very necessary operations on it.

The interaction of the command receiver with the computer took place through the COM port, which imposed some restrictions on other devices connected to the same port. Indeed, in modern computers, manufacturers leave only one COM port connector, and in the future, most likely, it will be completely removed. It was replaced by a more versatile and faster USB interface. Finding a free USB connector is not difficult; there are a lot of them on a modern computer. In addition, devices equipped with this interface can work without causing mutual interference.

IR remote control command receiver with USB interface
Fig. 1

On fig. 1 shows a diagram of an IR remote control command receiver that interacts with a computer via USB. Its main element - the AT90S2313 [2] (DD1) microcontroller - converts the commands received from the IR receiver module B1 [3] to a form suitable for transmission via the USB interface to a computer. The HL1 LED is also connected to the output of module B1, which blinks when a command is received. Resistor R3 is necessary so that when the X1 plug is connected to the USB socket of the computer, the latter automatically recognizes the connected device.

IR remote control command receiver with USB interface
Fig. 2

The drawing of the printed circuit board of the receiver and the location of the parts on it are shown in fig. 2. For the DD1 microcontroller, a 20-pin panel is installed on the board, all other parts are soldered directly to the board. The TSOP1736 IR receiver can also be replaced by the widely used SFH506-36. The type of other details does not matter.

IR remote control command receiver with USB interface
Fig. 3

To load the program into the microcontroller, I used the simplest programmer, assembled according to the diagram shown in Fig. 3. Structurally, it consists of a DB25M (X1) plug connected to the computer's LPT port socket, and a panel for a programmable microcontroller. Resistors R1-R3 and jumpers are soldered directly to the corresponding pins of the plug and panel. The programmer is controlled by the IC-Prog program, the operation of which is described in detail in [4]. In the list of programmers supported by this program, select Fun-Card Programmer.

The procedure for using the manufactured receiver together with the Girder program for controlling a computer is similar to that described in [1], except that instead of the plug-in for the Igor SFH-56 device COM port, you should use its updated version IgorPlug-USB with support for USB devices. To do this, following step 7 of the setup procedure proposed by A. Zotov, you should "click" on the line "IgorPlug-UDP / IP and IgorPlug-USB and IgorPlug-COM for WinXP" in the list of plug-ins, click on the "Settings" screen button and select the port USB.

In conclusion, it should be said that such a device can be used to enter not only commands, but also other digital information into a computer. If, for example, instead of the IR receiver module, a temperature sensor (for example, DS18B20) is installed and the microcontroller program is changed accordingly, then the readings of this sensor can be entered into the computer via the USB interface.

The microcontroller program and the plug-in necessary for the operation of the device can be downloaded hence.

Literature:

Zotov A. We control programs using the remote control. - Radio, 2004, No. 8, p. 22, 23.
ATtiny2313 Product Card. - http://atmel.com/dyn/products/product_card. asp?part_id=3229.
Dolgy A. IR signal receiver modules. - Radio, 2005, No. 1, p. 47-50.
Dolgy A. Programmers and programming of microcontrollers. - Radio, 2004, No. 1-12

Author: D.Zakharov, Prokopyevsk, Kemerovo Region; Publication: radioradar.net

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