6 Channel RF Remote Control
Posted on Mar 6, 2013 11385
Under: Remote Control Circuits
This project creates a simple but valuable a wireless remote controller. He has as many as 6 channels (a rare feature for remote business) and transmits encoded MM53200 , UM3750 or UM86409 . Of course you can omit the button and make such a 2-channel remote control. It 'a pairing perfect for Nutchip , and is easy to build home-why do not you use special components: even the battery is a common 9-volt battery found in all supermarkets. This diagram illustrates a remote fixed codes , ready to work immediately without adjustments. but plan appropriately the chip, you can also get codes like making a simple change.
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The remote is powered by a battery of 9 volts, connected to the terminal ends of the M1. The negative terminal of the battery goes to "mass", while the positive comes in integrating IC2 , which stabilizes the voltage to 5 volts. IC2 78L05 is equivalent to the more common, but has a much lower consumption making it ideal for battery applications .. The heart of the remote control is IC1, a PIC16F84 microcontroller, the legendary American company integrated Microchip . With the software (free!) we have developed the PIC becomes a basis for universal remote controls, in which each leg has a specific function. The keys are always connected between pairs of pins such as " COL "and" ROW : we will use 6 on 16 routes, leaving Col4, ROW3 and ROW4 disconnected. A simple network delay (R1, C1) provides the RESET power. The power to reach 5Volt IC1 through the legs 14 (+5 V) and 5 (ground). The capacitor C2 (weld as close as possible to the pin of IC1) clears any feeding problems. The clock is generated by OSC1, a ceramic resonator 4MHz 3-pin: to use to use a quartz (2 feet), you add two small capacitors as shown in the diagrams of the base Nutchip. The foot DEFAULT (2) set to +5 volt select pre-stored codes, and the foot RF (3) shows the chip in the radio mode. The foot LED (17) driver LD1 is turned on whenever you press a button. The pulses for the transmitter out of the pin OUT (18) and go to TX1, a transmitter module to the 5Volt Aurel. The transmitter module requires an antenna tuned on 433 MHz to be connected to pin ANT . Here are the opposite of the components on the PCB. You can also use "spacers" (using the same format and following the grid), or a breadboard spring (breadboard), because the assembly is not critical. The work is not difficult and with a minimum of patience and precision can be completed by all. Start with the lowest components (resistors), rising gradually to the highest and bulky. Better to use a socket IC1 and the module transmitter TX1 (a "strip" female will do). Be careful not to reverse the polarity of the LED, the battery, the integrated form of the capacitor C3 and TX1: if in doubt check the COMPONENTS page for details. L ' antenna is connected to the piazzolina ANT , a piece of copper wire drive, 16.5 cm long, will be fine. Then if you want that extra touch, we recommend the professional model of Aurel, flexible black rubber. Once the board (and after a further check of all connections) and the first to enter the PIC and the module TX1 connect the battery taking care not to reverse the polarity. Check with a tester between pins 5 and 14 of the base of IC1 have all of the 5 volt stabilized, as well as between the pairs of legs 3:01 p.m., 3:04 p.m., 3:13 p.m. module TX1. Once the controls, remove the battery and insert the PIC (which you have previously programmed with the file "picrmt.bin") and the module TX1 (with the component side to the outside of the board). Are you ready for the final test! The remote should work now. Just connect the battery, the LED turns on for about a second, then turn on every time I press a button. If you do not find all the components, you can make the sosituzioni with similar parts. Be careful though, to pin-outs, which can change from those provided in our printed circuit boards. The 'integrated stabilizer is a 5 volt regulator specifically for battery-driven appliances. Its characteristic is that they do not "eat" the battery to empty ( Low Power Consumption ) and power operation at low battery ( low-dropout ). Can be replaced by a common 78L05 (note the L), at the expense of battery life ( loooong less!). The PIC can be either a PIC16F84 or 16F84A. The recovery is the card for digital TV. The transmitter module is not critical and can be replaced with other modules on / off 5 volts and the frequency of 433 MHz of other producers (eg, Mipot). If you want to make a tiny transmitter then consider a model with built-in antenna (but do not expect a great extent). In fixed installations (wireless doorbells, remote ignition of exterior lights, driving submersible pumps, etc) the battery may be replaced by a small DC power supply from 9 volts.