8 Bit Data And 10 Bit Adrress Radio Control

This Decoder give 8 Bit Data and 10 Bit Address. HT-648L is the main schematic.

How Build Radio Control Switch

This is A Simple RC switch Using IC 4001 and Transistor BC547.

Radio Control Using DTMF

This Schematic using IC UM91214B for transmitter and using IC KT3170/8870 for Receiver,
this IC usually use for telephone to generate DTMF tone.

Receiver RF Modul using Max-1473

COMPONENT ;VALUE FOR 433MHz RF ;VALUE FOR 315MHz RF ;DESCRIPTION L1 ;56nH ;110nH ;Toko LL1608-FH L2 ;15nH ;15nH ;Murata LQP11A L3 ;15nH ;27nH ;Murata LQP11A C1 ;100pF ;100pF ;5%C2 ;2.7pF ;4.7pF ;±0.1pF C3 ;100pF ;100pF ;5%C4 ;100pF ;100pF ;5%C5 ;1500pF ;1500pF ;10%C6 ;220pF ;220pF ;5%C7 ;470pF ;470pF ;5%C8 ;0.47µF ;0.47µF ;20%C9 ;220pF ;220pF ;10%C10 ;0.01µF ;0.01µF ;20%C11 ;0.01µF ;0.01µF ;20%C12 ;15pF ;15pF ;Depends on XTAL C13 ;15pF ;15pF ;Depends on XTAL R1 ;5k? ;5k? ;5%X1 ;6.6128MHz or 13.2256MHz ;4.7547MHz or 9.5094MHz ;— X2 ;10.7MHz ceramic filter ;10.7MHz ceramic filter ;Murata SFECV10.7 series ;;;

Modul RF Transmitter using MAXIM 1472

Modul RF using MAXIM 1472

Basic Radio Control Encoder

This is just a simple multivibrator with one timing resistor selected by a CMOS Johnson counter. In this way the start of each pulse is determined by a different potentiometer. Each potentiometer should vary from 0 to 100K. Note that normal joysticks used for computers may be fitted with a linear 100K pot but provide only 60 degrees of the total 300 degrees of movement. This means that you should either fit a 500K pot or change the timing capacitors (10n) in the encoder circuit.
The ON pulse from the multivibrator should be about 300nS to 400nS in length and the OFF pulse should vary from 200nS to 1200nS. With this timing you should be able to drive almost any of the cheaper servo's (eg. Futaba, Horizon etc). The servo should give you a 180 degree movement for the full movement of the encoder pot. The 10K resistor in the encoder circuit prevents a zero-ohm pot stuffing the full supply voltage on the base of the transistor. The 300K resistor determines the length of the silence between each channel pulse-train. This period of silence should be about 4mS or more. The 4017 outputs 0 - 8 can be used to give you 9 independant proportional channels but the tenth is used to provide the silence between each channel pulse-train. I have only shown six channels in the drawings so output 7 must be used to reset the counter back to 0 again.

Basic Radio Control Decoder

OP-Amp "a" amplifies the incoming pulses from the receiver. This stage is self biassed and may be connected directly to the output of a ZN414Z, ZN416E or any other output with between 0 to +6vDC standing potential. If the output of the receiver is capacitively coupled, has a standing negative DC potential or is DC grounded then couple the signal in via a 10nF capacitor and connect a high value resistor (470K - 2M2) between the two points marked with an "X". The output of this stage should be a near perfect square-wave. This square-wave is used to clock the channel counter and "top-up" the charge of a capacitor.
OP-Amp "b" compares the charge on the "top-up" capacitor. During the 4mS silent period this capacitor will discharge causing OP-Amp "b" to reset the counter. Note that the 4017 output 0 is a reset output and the channel outputs are 1 to 6 (up to 9). The output signal from each channel terminal is a single pulse which varies from 600uS to 1600uS depending upon the setting of the encoder channel potentiometer.
A normal servo has three wires; Black, Red and White. Black is negative, Red is +6vDC and the white is the pulse input from the receiver. Servo's normally draw 300mA to 500mA which may disturb the recever. If this is the case then feed the +DC supply to the servo via a 10 ohm resistor and feed the receiver +DC supply via a diode and connect a 470uF accross the receiver supply.

Radio Control Using MC-145026 & MC-145027

These devices are designed to be used as encoder/decoder pairs in remote control applications.
The MC145026 encodes nine lines of information and serially sends this information upon receipt of a transmit enable (TE) signal. The nine lines may be encoded with trinary data (low, high, or open) or binary data (low or high). The words are transmitted twice per encoding sequence to increase security.
The MC145027 decoder receives the serial stream and interprets five of the trinary digits as an address code. Thus, 243 addresses are possible. If binary data is used at the encoder, 32 addresses are possible. The remaining serial information is interpreted as four bits of binary data. The valid transmission (VT) output goes high on the MC145027 when two conditions are met. First, two addresses must be consecutively received (in one encoding sequence) which both match the local address. Second, the 4 bits of data must match the last valid data received. The active VT indicates that the information at the Data output pins has been updated.

Simple Radio Control Receiver Using HT

1. RWS Gnd to header-pin #1
2. RWS Vcc to header-pin #3
3. RWS Digital-Output to header-pin #2

HT-12E encoder data transfers to HT-12D data-pins via RF transmission.
VT-pin transitions from low to high on valid reception & address.
More detailed information is available from http://www.rentron.com
For 8-bit RF remote control, substitute the HT-12D with HT-648L decoder.

Simple Radio Control Transmitter Using HT

Using IC HT12-E we can Create R/C Transmitter very Easy
This IC have 8 Bit address.

Radio Control Application

• "CLONEPAC" memory module for Futaba 8UAF/8UAP


• 0-10V control for RC servos


• 250-amp Speed Controller for RC cars


• 27Mhz toy car receiver


• 27Mhz toy car transmitter


• A dual alternating flashing light circuit


• A dual tandem flashing light circuit powered by a 9 volt battery


• A Receive Signal Decoder


• Alf: The Robotic Matchbox car


• Battery low voltage alarm


• Battery low voltage alarm 2


• Battery pack discharger


• Building an RF Remote Control System


• Deluxe charge rate monitor


• Discharger for Receiver Battery Packs


• Downed model locator


• Downed model locator Mark 2


• Electronic millipede robot


• Glow Plug driver for model engines


• Handy cricket for robotic applications


• Incline Railway Control Circuit


• Launch controller for multiple rockets


• LED traffic lights


• Model rocket launch controller


• Model Rocket with Video Camera


• Motor walker circuit


• Multi Rocket Launcher


• One ounce rocket ejection timer


• Pad launch controller for model rockets


• PIC based rocket altimeter


• Plane locator


• Plane locator 2


• Precision Receiver Battery Low Voltage Alarm


• Proportional radio remote control


• R/C digital camera controller


• R/C Emergency locator alarm


• R/C helicopter camera


• Radio Control Battery Backup


• RC Receiver Battery Low Voltage Alarm


• Remote switch for radio-control aircraft accessories


• RF serial link for robot


• Robot with PIC16F84 brain & InfraRed eyes


• Robotic microcontroller board


• Seaplane schematic


• Signal breaking module


• Simple charge rate monitor


• Simple flashing light circuit


• Simple flashing light circuit


• Simple flashing light circuit


• Simple train detector using ambient light and a photocell


• Simulate the Gyralite (dual flashing headlights).


• Snake throat muscle controller


• Spider robot electronic project page


• Two tone train horn


• Two-tone siren


• Ultimate battery low voltage alarm

27Mhz toy car transmitter/receiver

• receiver


• transmitter

L1, L4=9 turns, .15mm wire on 4.5mm diameter tunable ferrite coil former

L2=15 turns, .5mm wire, 5mm diameter

L3=3.5 turns, .5mm wire, 5mm diameter

49MHz walkie-talkie

• schematic

434MHz ASK/OOK AM transmitter/receiver

• RX3302 super-regenerative receiver module schematic


• RX3302 super-regenerative receiver module photo


• X10 RF daughter board - super-regenerative receiver


• 434MHz short-range communications - article in Elektor 1998/5


• SP-Elektroniikka super-regenerative receiver and SAW-based transmitter


• SAW-based 434MHz transmitter schematic with RO2101 (from appnote below)


• SAW-based transmitter design appnote from RFM


• SAWR-based transmitters, EPCOS appnote#1

Single-chip RF transmitter/receiver integrated circuits

• MAX1470 315MHz Low-Power, +3V superheterodyne receiver


• MAX1472 300-450MHz ASK transmitter


• MAX1473 315/433MHz ASK superheterodyne receiver


• Atmel T5754 434MHz UHF ASK/FSK transmitter


• Atmel U2741 300-450MHz UHF ASK/FSK transmitter


• Atmel U3741 300-450MHz UHF ASK receiver


• Atmel AT86RF211 400-950MHz programmable UHF FSK transceiver


• Chipcon CC1000 300-1000MHz programmable UHF FSK transceiver


• Nordic nRF905 433/868/915 MHz transceiver


• Integration Associates IA-4220 315,434,868,915MHz programmable no-parts FSK transmitter


• Integration Associates IA-4320 315,434,868,915MHz programmable no-parts zero-IF FSK receiver


• Himark RX3310A, RX3400 low power (2mA) UHF ASK receiver


• Melexis TH71101 315/433MHz FSK/FM/ASK, Single-Conversion Superhet
  
  TH71102 315/433MHz FSK/FM/ASK, Double-Conversion Superhet
  
  TH7122 27 to 930MHz, FSK/FM/ASK transceiver
  
  TH72011 434MHz FSK transmitter
  
  TH72012 434MHz ASK transmitter


• Microchip rfRXD0420 434MHz ASK/FSK superheterodyne receiver (same as TH71101)


• Microchip rfPIC12F675 434MHz ASK/FSK transmitter with flash microcontroller


• RFMD RF2915 433/868/915 MHz FSK/ASK/OOK transceiver


• RFMD RF2510 433/915MHz UHF FM/FSK transmitter


• Infineon TDA5100 434/868MHz ASK/FSK transmitter


• Infineon TDA5200/5210/5220 ASK/FSK receiver


• Philips UAA3201T 150-450MHz ASK receiver


• TI TRF1400 200-450MHZ ASK receiver, obsolete


• TI TRF4400 434MHz ASK transmitter


• Xemics XE1201A 300-500MHz FSK transceiver
  
  XE1205 433/868/915MHz multi-channel FSK transceiver