Design with IR Transmitter in Cirkit DesignerAn IR Transmitter is an electronic component that emits infrared light signals, typically in the wavelength range of 850 nm to 950 nm. It is widely used in remote control applications, enabling wireless communication between devices by transmitting encoded data. The IR Transmitter is a key component in consumer electronics, such as TVs, air conditioners, and other appliances, as well as in robotics and IoT systems.
This circuit is an IR transmitter system controlled by an Arduino UNO, powered by a 3.7V LiPo battery through a rocker switch. It includes multiple pushbuttons connected to the Arduino's digital pins, which likely serve as inputs to control the IR transmission, with a BC547 transistor used to drive the IR LED.
Open Project in Cirkit Designer
This circuit consists of a 5V battery, a push switch, and an IR transmitter. When the push switch is pressed, it connects the battery to the IR transmitter, powering it and allowing it to emit infrared signals.
Open Project in Cirkit Designer
This circuit uses an Arduino Nano to process input from an IR sensor and transmit data via an RF 433 MHz transmitter. The system is powered by a 3.7V battery, which is boosted to the required voltage using a DC-DC boost converter.
Open Project in Cirkit Designer
This circuit consists of an ESP-01 microcontroller connected to an IR receiver. The ESP-01 is configured to receive data from the IR receiver through its GPIO0 pin, and both components share a common ground and power connection. The provided code for the ESP-01 microcontroller is a template with empty setup and loop functions, indicating that the specific functionality for the IR data processing has not been implemented yet.
Open Project in Cirkit DesignerBelow are the key technical details for the IR Transmitter manufactured by fart (Part ID: fart):
| Parameter | Value |
|---|---|
| Wavelength | 850 nm to 950 nm |
| Forward Voltage (Vf) | 1.2V to 1.5V |
| Forward Current (If) | 20 mA (typical), 50 mA (max) |
| Power Dissipation | 100 mW (max) |
| Beam Angle | 20° to 30° |
| Operating Temperature | -25°C to +85°C |
| Storage Temperature | -40°C to +100°C |
The IR Transmitter typically has two pins:
| Pin | Name | Description |
|---|---|---|
| 1 | Anode (+) | Connect to the positive terminal of the power supply |
| 2 | Cathode (-) | Connect to the ground or negative terminal |
Below is an example of how to connect and use the IR Transmitter with an Arduino UNO to send a 38 kHz modulated signal:
// This code sends a 38 kHz modulated signal using an IR Transmitter
// connected to pin 3 of the Arduino UNO.
int irPin = 3; // IR Transmitter connected to digital pin 3
void setup() {
pinMode(irPin, OUTPUT); // Set the IR pin as an output
}
void loop() {
// Send a 38 kHz signal for 1 second
for (int i = 0; i < 1000; i++) {
digitalWrite(irPin, HIGH); // Turn the IR LED on
delayMicroseconds(13); // 13 microseconds for 38 kHz HIGH pulse
digitalWrite(irPin, LOW); // Turn the IR LED off
delayMicroseconds(13); // 13 microseconds for 38 kHz LOW pulse
}
delay(1000); // Wait for 1 second before repeating
}
IR Transmitter Not Working
Weak Signal or Short Range
Interference from Ambient Light
Receiver Not Responding
Q: Can I use the IR Transmitter without modulation?
A: No, most IR receivers require a modulated signal (e.g., 38 kHz) to differentiate the IR signal from ambient light.
Q: What is the maximum range of the IR Transmitter?
A: The range depends on the power of the IR Transmitter and the sensitivity of the receiver. Typically, it ranges from 5 to 10 meters in indoor environments.
Q: Can I use the IR Transmitter with a 3.3V microcontroller?
A: Yes, but ensure the forward voltage and current requirements are met. Adjust the resistor value accordingly to limit the current.
Q: How do I test if the IR Transmitter is working?
A: Use a smartphone camera to view the IR Transmitter while it is active. The camera can detect infrared light, which will appear as a faint purple glow.