Lighting control with remote control. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Color and music settings
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The device, the diagram of which is shown in Fig. 1, allows you to control the lighting using the TV remote control (RC). A total of five control channels (RH1...RH5). At the same time, by pressing the corresponding button on the remote control, you can turn on any combination of lamps. The correspondence between the given commands and the included loads is given in Table 1. Load RH5 activated using separate buttons on the remote control. Using the SB1 button, it is possible to completely turn off the device.
Fig.1. Schematic diagram of the device (click to enlarge)
Table 1
Programs,
N | Load channels (terminals DD1) |
|---|
| 4 (pin 8) | 3 (pin 9) | 2 (pin 10) | 1 (pin 11) |
|---|
| 1
| 0
| 0
| 0
| 0 |
| 2
| 1
| 0
| 0
| 0 |
| 3
| 0
| 1
| 0
| 0 |
| 4
| 1
| 1
| 0
| 0 |
| 5
| 0
| 0
| 1
| 0 |
| 6
| 1
| 0
| 1
| 0 |
| 7
| 0
| 1
| 1
| 0 |
| 8
| 1
| 1
| 1
| 0 |
| 9
| 0
| 0
| 0
| 1 |
| 10
| 1
| 0
| 0
| 1 |
| 11
| 0
| 1
| 0
| 1 |
| 12
| 1
| 1
| 0
| 1 |
| 13
| 0
| 0
| 1
| 1 |
| 14
| 1
| 0
| 1
| 1 |
| 15
| 0
| 1
| 1
| 1 |
| 16
| 1
| 1
| 1
| 1 |
| Note: 0 - load off, 1 - load on. |
LED HL3 serves to indicate the operating mode. In working mode, it glows.
Chip KR1506HL2 (SAA1251) is a microcontroller for a remote control system used in TVs of 3-4 generations. It works in conjunction with the KR1506HL1 microcircuit - a transmitter of remote control commands according to the ITT format.
Based on it, remote controls such as PDU-2, PDU-3, PDU-15, PDU-Rekord, PDU-4001 and others were built. They can also be used to control this system.
A diagram of a homemade remote control is shown in Fig. 2. The keyboard is not shown in the diagram, since, depending on the specific operating conditions (Table 2), the keyboard may have different options. An example of a command word generated by the remote control IC is shown in Fig.3. Resistors R10, R11 (Fig. 1) are selected according to the rated current through the zener diode. The photodetector is preferable to use the standard FP-2, used in TVs of 3-4 generations, but it can also be made independently. The diagram of the simplest version of the photodetector is shown in Fig.4.
Fig.2. Remote control diagram
Table 2
| Team number | The conclusions connected in the microcircuit | Command code | Executable function |
|---|
| 2
| 15-22
| 000001
| Turn off, switch to standby mode |
| 8
| 15-16
| 000111
| Switching programs in a ring |
| 17
| 13-23
| 010000
| Program 1 |
| 18
| 13-22
| 010001
| Program 2 |
| 19
| 13-21
| 010010
| Program 3 |
| 20
| 13-20
| 010011
| Program 4 |
| 21
| 13-19
| 010100
| Program 5 |
| 22
| 13-18
| 010101
| Program 6 |
| 23
| 13-17
| 010110
| Program 7 |
| 24
| 13-16
| 010111
| Program 8 |
| 25
| 12-23
| 011000
| Program 9 |
| 26
| 12-22
| 011001
| Program 10 |
| 27
| 12-21
| 011010
| Program 11 |
| 28
| 12-20
| 011011
| Program 12 |
| 29
| 12-19
| 011100
| Program 13 |
| 30
| 12-18
| 011101
| Program 14 |
| 31
| 12-17
| 011110
| Program 15 |
| 32
| 12-16
| 011111
| Program 16 |
| 35
| 11-21
| 100010
| Additional load |
| 36
| 11-20
| 100011
| On/Off |
Fig.3. An example of a command word generated by the remote control IC
Fig.4. Photodetector circuit
The power consumed by the lamps of each channel should not exceed 250 W (in the absence of heat sinks on the thyristors). The total power consumption of all channels is determined by the maximum allowable current of the diode bridge. Thyristors, transistors and a diode bridge can be installed on a common heat sink housing. With an area of 500 cm2 the current of one channel can reach 2,5 A, but not more than 10 A for all channels simultaneously.
As loads, you can use incandescent lamps or devices that operate on direct current, for example, switching power supplies.
Attention! The circuit shown in Fig. 1 has a transformerless mains supply. Care must be taken when setting it up. The sign "body" on the diagram is indicated to simplify the graphics. Do not ground the device!
Author: A.Filipovich, Dzerzhinsk; Publication: radioradar.net
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