Device, scheme of which is shown in Fig.1, allows you to control lighting using the remote control TV (remote control). All you can use up to five channels of control (...RH1 RH5). In this case, pressing the corresponding button remote control can include any combination lamps. The correspondence between the specified commands and included loads are given in table.1. Load RH5 activated via separate buttons on the remote control. Using the button SB1 is possible to fully disable the device.
Fig.1. Schematic diagram of the device
Table 1 ProgramN Channels load (findings DD1) 4 (pin 8) 3 (conclusion 9) 2 (pin 10) 1 (pin 11) 10000 21000 30100 41100 50010 61010 70110 81110 90001 101001 110101 121101 130011 141011 150111 161111 Note: 0 is the load off, 1 - the load is turned on.
The HL3 led serves to indicate the mode of operation. During operation, it glows.
Chip CRHL (SAA1251) is a microcontroller of the remote control system used in televisions 3-4 generations. She works together with chip CRHL transmitter remote control commands on the format of the company ITT.
On the basis of its built remote control type RC-2, RC-3, RC-15, RC-"Record", PDU-4001 and others. They can also be used to control this system.
Scheme homemade remote control shown in Fig.2. The keyboard is not shown, since, depending on the specific operating conditions (tab.2), the keyboard can have different choices. Example of command words generated by the IC the RC is shown in Fig.3. Resistors R10, R11 (Fig.1) select the rated current through the Zener diode. The photodetector is preferable to use a standard OP-2) used in televisions 3-4 generations, but it can be made independently. The scheme is the simplest variant of the photodetector shown in Fig.4.
Fig.2. Diagram of the remote control
Table 2 The number of the team's Findings, connected in the chip command Code function to be Executed 215-wit, will go to standby mode 815-ITA programs around the ring 1713-arm 1 1813-arm 2 1913-3 arm 2013-4 arm 2113-5 arm 2213-6 arm 2313-7 arm 2413-8 arm 2512-9 arm 2612-10 arm 2712-11 arm 2812-12 arm 2912-13 arm 3012-14 arm 3112-15 arm 3212-16 arm 3511-load Ala 3611-WL./Off.
Fig.3. Example of command words generated by the remote control IC
Fig.4. Diagram of the photodetector
The power consumed by the lamps of each channel should not exceed 250 W (in the absence of heat sinks for thyristors). The total power of all channels is determined by the maximum allowable current of the diode bridge. Thyristors, transistors and diode bridge can be installed on a shared body-heat. When the area of 500 cm2 current of one channel can reach 2.5 A, but not exceeding 10 A for all channels simultaneously.
As loads of you can use incandescent lamps or devices operable on direct current, e.g. switching power supplies.
Attention! The circuit shown in Fig.1, has a transformerless AC power. If adjustment should be used with caution. The symbol "case" in the diagram is indicated to simplify the graphics. Ground the device cannot!
Author: A. Filipovic, Dzerzhinsk; Publication: www.radioradar.net