One Channel Infra-Red Remote and receiver with onboard Relay provides normally open and normally closed output. The project based on PIC12F683 Microcontroller from Microchip , TSOP1738 used as Infra-Red receiver. Micro-controller decodes the RC5 serial data coming from TSOP1738 and provides high output if the data is valid. The output can be set Momentary or Latch using on board Jumper (J1) and closure. The board provided with 3 LEDs, Power LED, Valid Transmission LED and Output LED. This Remote works with switch No1 of RC5 Remote.
Power Supply Remote 2X AA Batteries
Power Supply Receiver 7-12V DC
Current Consumption Receiver 30mA
Onboard jumper for momentary and latch operation selection
4 Channel RF remote built using PT2262 and PT2272-M4 IC from Princeton technology. PT2262 used as Encoder (Transmitter) and PT2272-M4 Decoder (Receiver) ICs are heart of the project. The receiver provides 4 channel Momentary outputs. All outputs are TTL level can be interface with other circuits or relay board. Transmitter works with 5V to 12V DC. Receiver works with 5V DC.
When any of SW1-SW4 (S1-S4) tact switch is pressed the, power is applied to encoder IC and RF transmitter module, the encoder then starts scanning Jumper J1-J8 and transmitting the status of the 8 bits address and data serially. The decoder IC receives the data and compares two times with J1-J8 address jumpers and provides outputs high and also VT LED goes On, if the data is Valid and address of Transmitter and Receiver are same. It is important to have same jumper settings J1-J8 at transmitter and receiver to pair both. Multiple remote can be used to control devices at same location by changing the address codes. All address is Tri-State and offers 6561 combinations.
Following relay board can be used to drive AC/DC load with Remote controller Receiver
PT2262 is a remote control encoder paired with PT2272 utilizing CMOS technology. Its encode data and address pins into a serial coded waveform suitable for RF modulation. Circuit uses 8 bits of tri-state address pins providing up to 6561 address codes, thereby, drastically reducing any code collision and unauthorized code scanning possibilities.
PT2262 encodes the code address and data set into special waveform and outputs it to the DOUT when TE is pulled to low. The wave is fed to RF modulator (ASK RF TX Module) for transmission. The transmitted radio frequency is received by RF demodulator (ASK RF RX Module) and reshaped to special waveform. PT2272 is then used to decode the waveform and set the corresponding output pins. Thus completing a remote control encoding and decoding function.
PT2272 decodes the waveform received and fed in to the DIN pin. The waveform is decoded into code word that contains the address, data and sync bits. The decoded address bits are compared with the address set at the address input pins. If both address match for 2 consecutive code words, PT2272 drives the data output pins whose corresponding data bits is the decoded to be a 1 bit, and (2) the VT output — to high state.
VT (Valid Transmission)
When PT2272 receive a transmission code word, it initially checks weather this is a valid transmission. For a transmission to be valid, (1) it must be complete code word, and (2) the address bits must match the address setting at the address pins. After two consecutivevalid transmission, PT2272 (1) drives the data pins according to the data bits received, and (2) raises VT to high state.
NOTE : Jumper J1 to J8, To set High Jumper provided at Bottom layer of PCB, Jumpers and closure provide to set low, don’t use any of these for floating.
Wide Range of Operation Voltage 5V to 12V Transmitter
Supply 5V DC Receiver
On Board Data Transmission LED
Single Resistor Oscillator
4 Momentary Outputs
4 Outputs TTL Level
Address setting 3 states HIGH, LOW, And FLOATING)
Remote provides 6561 addressable combinations by setting up J1-J8 to High, Low, and Floating.
On Board Power and Valid Transmission LEDS Receiver
16 Channel Infra-Red remote controller is based on PIC16F73 Microcontroller from Microchip. The receiver part follows RC5 (Philips) Code Format. Tiny receiver provides 16 latch outputs or 8 Latch + 8 Momentary outputs by closing Jumper J1. All outputs are TTL and can drive Relay board or solid state relay. The circuit uses TSOP1738 Infra-Red receiver module which provides high degree of noise immunity against interfering light source.
16 Channel Infra-Red remote controller is built around PIC16F73 Microcontroller from Microchip. The receiver part follows NEC Code Format. Tiny receiver provides 16 latch outputs. All outputs are TTL and can drive Relay board or solid state relay. The circuit uses TSOP1738 Infra-Red receiver module which provides high degree of noise immunity against interfering light source.
Supply Remote Transmitter 3V CR2025 Battery
Supply Receiver 7V to 12V DC
NEC Code Format
Operating range up to 10-15 feet
2 Pin Screw Terminals for Supply Input
On Board Power LED
Onboard VT (Valid Transmission) LED
All 16 Channels are Latch Outputs
All Outputs TTL Level provided with Header Connector
Project has been designed around Holtek Encoder HT640 and Decoder HT648L IC, compact transmitter is ideal for remote application. This transmitter has range of 10-30 meters, 10 Jumper selectable addressing provide security and allows creation of multiple transmitter and receiver
Encoder and Decoder has 10 Address lines and they must match in order to transmitter and receiver to communicates to each other. If they do not set same in transmitter and receiver, receiver will not take any action and will be no output. Jumper setting can be done via J1 to J10 in transmitter and receiver. Ideally Address pin has 3 states high, low and floating in this project we have use only two states low or floating so 1024 combination are possible. Transmitter and receiver both work with 5 VDC supply and has onboard power indication as well as valid transmission indication at receiver end. Power on/off via J11 jumper (transmitter & receiver) and closer for external On/Off switch wire can be pull from J11. Remote has two modes Latch or Momentary and can be achieve changing jumper J12 (L – Latch, M – Momentary).
Supply 5 VDC @ 35 mA
Low power high immunity
92 MHz frequency
Two word transmission via Jumpers
Optional berg connector for micro-controller interface
Latch and Momentary option via jumper
Supply On/Off via jumper
Range 10-30 meters
Supply 5 VDC @ 50 mA
Output via berg connector easy interface with 8 channel relay board
RF Based DC Motor Direction Controller project provides an easy way to control the direction of your DC Motor connected to the receiver. This project has been design around HT12E and HT12D encoder / decoder chips from Holtek. With jumper selectable address on the receiver and transmitter we can control multiple motors in one area without interference with one remote.
Remote Motorized Volume Control
Remote Toy or Robot Controller
Remote Controlled Curtains
Supply input, Transmitter : 3 ~ 5 VDC, 5 V @ 20 mA &
Receiver : 5 V @ 31 mA without Motor
Motor current and supply: 5 ~ 6 VDC @ 500 mA
Range up to 30Mtrs, open area it can be more
Jumper connector selectable 8 bit address code
Valid Transmission LED
On Board On/OFF Slide Switch for Transmitter
Power-On LED indicator in the receiver/transmitter
High noise immunity
Screw terminal connector and terminal pins for easy input/output connection
Four mounting holes of 3.2 mm each
PCB dimensions, Transmitter : 60 mm x 37 mm & Receiver : 60 mm x 58 mm
LUX Meter project has been design to measure the illumination. Illumination is luminous flux falling on surface area of photo diode. This illumination converted to corresponding voltage using Op-Amp circuit.
Supply 9 VDC PP3 Battery @ 20 mA
Onboard Photo Diode
Onboard preset for calibration
Range selection via jumper 10mV/LUX, 1mV/LUX, 0.1mV/LUX
Interfacing is via berg connector
Power-On LED indicator
Four mounting holes of 3.2 mm each
PCB dimensions 53 mm x 38 mm
The project is designed around Texas instrument Op-Amp TLC271 which can operate from single supply with low bias current, here op-amp act as current to voltage converter. 5000 LUX (approx) can be measure with a voltmeter having 5V range. Meter is not provided.
J1 Jumper : 10mV/Lux
J2 Jumper : 1mV/Lux
J3 Jumper : 0.1mV/LUX
PR2 Preset : To Calibrate the meter
PR1 Preset : Fine Gain adjustment for 10mV/Lux
CN1 Connector : Supply 9 VDC (PP3 9V DC Battery Ideal) and Output Voltage
D2 LED : Power Indicator
D1 LED : Photo Diode (Sensor)
Standard incandescent 100W lamp should be used for approximation calibration. To make Calibration select the 1mV/Lux J2 Jumper, move the preset full in CCW. Connect the accurate voltmeter having range of 5V. Adjust the distance between the photo diode and Lamp so that voltmeter reads 0.38V0. At this point, illumination on photodiode surface is about 100 Lux (aprox). And then adjust the PR2 so that voltmeter reads 1V. Calibration has now been complete. This project is based on Hamamatsu Photo Diode Application
Digital Panel Meter performs digital processing on or conversion and display of voltages, currents, other analog signals, and pulse signals. This project is based on popular ICL 7107 IC, which is analog to digital converter and has been designed to drive 7 segment LED display. The ICL7107 is high performance, low power, 3, 1/3 digit A/D converter. Included are seven segment decoders, display drivers, a reference, and a clock. This DPM project may be used in a wide variety of configurations Full scale reading of +/- 199.9mV (200mV)
Supply 5V DC @ 80mA.
Range 0 to 199.9mV (200mV)
Low Current consumption
Low input leakage current because external reference