Infrared Switch | Electronic Project Circuits

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Universal RC5/RC6 Transceiver by PIC16F628

The IR receiver: When the TSOP1736 (IR receiver) receives an infrared (IR) signal from a RC5 or RC6 remote control (like Philips) burns LED1 (green). The LCD shows when it receives a new type of code for one second which protocol is received (RC5, RC5X or RC6). After then the LCD shows the RC5 or RC6 system- and command code in decimal as wel in binair. The toggle-value is shown by LED3 (yellow). LED2 (red) burns if the received signal is poor or if it’s not a RC5, RC5X or RC6 signal. If you only want to know the code from a button then you can ofcourse also look at the RC5 tables from this website (See here and here). The IR transmitter: With the IR-transmitter it is possible to send every possible code from the RC5, RC5X and RC6 protocol, like a remote control does. With the help of the LCD you can adjust which RC5, RC5X or RC6 system- and command code must send out. When start up select first with ‘ADJUST’ (S2) the RC5 or RC6 protocol, when the choise is right, confirm with ‘SEND’ (S3). To adjust the command value press ‘ADJUST’. If this button is pressed for a longer time, the counter changes from direction. If this button is pressed much longer, then the counter starts repeating automatically and counts faster and faster.

Infrared Remote Control System Receiver

Infrared Remote Control System Receiver By IC Digital
This is a single channel (on / off) universal switch that may be used with any Infra Red remote control that uses wavelengths between 850-950nm.

Notes:
Any “button” of any remote control may be used to work this universal switch. The button must be pressed for two seconds (determined by R3 and C2) before the relay will operate. Once operated the circuit will remain in this state (latched) until reset. To reset, any button is pressed and held for the delay.
For example, if you were watching TV, and your set was tuned to Channel 3, you could press and hold the TV remote controls channel 3 button for two seconds. That way the TV viewing would not be affected and the relay would activate. You can connect anything to the relay, for example a lamp, but make sure that the relay contacts can handle the rated voltage and current.

Circuit Operation:
IC1 is an Infra Red module. IR modulated pulses are received and buffered by this IC. It has a standard TTL output, the output with no signal is logic 1. One gate of a CMOS inverter and drives Red LED1 as a visible switching aid. Another gate buffers the signal and applies it to the time constant circuit, comprising R3,C2,R4 and D1. C2 charges via R3, and discharges via R4, D1 prevents quick discharge via the low output impedance of the CMOS buffer.

Source : http://www.electronics-lab.com/projects/models/008/index.html

Be the first to comment - What do you think? Posted by admin - October 1, 2007 at 10:40 pm

Categories: Electronic Control Tags: digital circuit, infrared circuit, infrared switch, IR remote control

Dusk to dawn switch by IR-Diode

This dusk to dawn switch switches on the lamp at night and automatically switches off the lamp in daytime.
The circuit uses an old-fashioned relay as switching element which makes it suitable for all lamp types: not only
incandescent but also TL and compact fluorescent.

description

When it is light, infrared-diode D1 will be conducting; the voltage on the anode of D1 (see arrow) will be high.
A current will flow through R1 into the base of T1. Because T1 pulls down the base of T2 the relay is switched off.

In the dark, D1 will stop conducting; the voltage on the anode of D1 will become low.
Consequently the base current of T1 will decrease and current will flow into the base of T2 via R3: the relay is switched on.

-The light sensitivity can be adjusted wiith P1; lower resistance = more light necessary to switch off the relay.
-R2 creates some hysteresis to prevent fllickering at the circuit’s trip level.
-C1 creates a low pass filter with R1, allso to prevent flickering and to decrease sensitivity to 50Hz hum.
-The trip-voltage on the anode of D1 (seee arrow) is about 1 Volt; below 1V the relay will switch on; above it will switch off.
-I used a LED-shaped IR diode; very conveenient for waterproof mounting in the lamp fixture.
-The circuit will also work with other liight sensors as photo diodes/transistors and LDR’s. IR diodes have the advantage that
they are not very sensitive to light from TL or other fluorescent lamps which emit very little infrared !

Read More Source :http://www.geocities.com/tjacodesign/duskdawn/duskdawn.html
Thank you.