| 0,0 → 1,80 |
|---|
| Servo controlled infrared transmitter |
| |
| Application examples: |
| - Remote control for a camera on a RC-model through normal servo channels. |
| - Control for a TV at home. Doorbell connected to one input - switches the TV to a surveillance cam. |
| - Control for a stereo at home. Motion sensor connected to one input - pump up the volume to scare a housebreaker. |
| |
| The idea for this project came up, to control a HD-camcorder on a Mikrokopter with a second radio-transmitter. |
| Gas-Stick: Zooming Camera |
| 3-way Switch: Stop/Picture/Movie record |
| Nick-Stick: Cameraholder-Nick |
| Roll-Stick: Cameraholder-Roll |
| |
| |
| Inputs: |
| 2 channels for servo-signals, switches or other TTL signals |
| 1 IR-Receiver to learn new codes (36 - 40 kHz) |
| |
| Output: |
| Modulated infrared signal at 950 nm |
| |
| Controls: |
| 1 LED to indicate several operating modes |
| 1 button to enter/leave the learning mode and switch between single and multi mode |
| |
| Supply voltage: |
| 5V DC @ 50 mA |
| (Attention when using RC-Receivers with higher voltage) |
| |
| |
| Theory of operation: |
| |
| Each channel is seperated into 5 states, depending on the positive pulse width: |
| 0,00 - 0,74 ms => 0 (switch to GND) |
| 0,75 - 1,24 ms => 1 (stick down) |
| 1,25 - 1,74 ms => 2 (stick middle) |
| 1,75 - 2,24 ms => 3 (stick up) |
| 2,25 - more ms => 4 (switch to VCC or open input) |
| |
| Together with the second input, you get theoretically 25 different combinations, which all can be populated with learned IR-code. |
| |
| When using servo signals only, you have 3 states per channel, so 9 combinations. |
| When using switch signals only, you have 2 states per channel, so 4 combinations. |
| When mixing both signals, you have 2 states for the switch and 3 states for the servo, so 6 combinations. |
| When using only one channel, you get 2 (switch) or 3 (servo) states. |
| |
| After power-up, the device checks the inputs the whole time. When a combination was learned with an IR-Code before, this code is sent out through the IR-Diode. Depending on which mode this combination was learned, it is sent out only once (single-mode), or as long as the combination stays active (multi-mode). |
| When the device sends out IR-Code, the red LED lights up. |
| |
| |
| Theory of learning: |
| When you press the button on the device, it goes to learning-mode. |
| In this mode, the LED flashes 1 or 2 times (depending of the actual mode) every half second, indicating that the device is waiting for IR-codes. |
| When pressing the button again, you can choose between single- or multi-mode. |
| |
| When an IR-code is sent to the device, it looks at which state-combination the inputs are, and saves the IR-code for this combination. |
| Saving is confirmed with fast flashing of the LED. |
| You can now learn multiple combinations with different (or same) IR-codes, you can even mix up different IR-protocols and use different modes on different combinations. |
| When you have learned enough, press the button for 2 seconds, to permanently save the data to the EEPROM. This is confirmed with fast LED-flashing. |
| The device goes back to normal operation and is ready for orders. |
| |
| |
| Currently supported IR-Protocols |
| Protocol: Used by |
| =================== |
| GRUNDIG Grundig |
| JVC JVC |
| KASEIKYO Panasonic, Technics, Denon and more japanese manufacturer, which are member in "Japan's Association for Electric Home Application" |
| NEC NEC, Yamaha, Canon, Tevion, Harman/Kardon, Hitachi, JVC, Pioneer, Toshiba, Xoro, Orion, NoName and much more japanese manufacturer |
| NIKON Nikon |
| NOKIA Nokia, e.g. D-Box |
| RC5 Philips and more european manufacturer |
| RECS80 Philips, Nokia, Thomson, Nordmende, Telefunken, Saba, Technisat |
| SAMSUNG Samsung |
| SIRCS Sony |
| |
| |
| The code was compiled using WinAVR-20081205. Other versions generate much bigger code which don't fit in the ATMega8 anymore. To avoid this, use another WinAVR version or disable some IR-protocols in irmpconfig.h and irsndconfig.h |
| |
| This project is based on the nice IR decoder/encoder routines (IRMP/IRSND) from Frank Meyer => http://www.mikrocontroller.net/articles/IRMP |