The Relay PYF-8 is a socket relay designed for switching applications. It allows for the control of high voltage and current loads using a low voltage signal, providing isolation and protection for sensitive components in a circuit. Manufactured for 230V applications, this relay is widely used in industrial automation, home appliances, and control systems. Its robust design ensures reliable operation in demanding environments.
This circuit is a home automation system that uses an ESP32 microcontroller to control an 8-channel relay module, which in turn controls various appliances such as fans and lights. The system includes multiple push buttons for manual control and a PIR motion sensor to automatically activate the relays when motion is detected.
Open Project in Cirkit Designer
This circuit features an ESP32 microcontroller connected to an 8-channel relay module. The ESP32 controls the relay channels via its GPIO pins, allowing for the switching of external devices or loads through the relays.
Open Project in Cirkit Designer
This circuit features an ESP32 microcontroller connected to an 8-channel relay module. The ESP32 controls the relay channels via its GPIO pins, allowing it to switch multiple external devices on and off. The ESP32 also provides power to the relay module.
Open Project in Cirkit Designer
This circuit features an ESP32 microcontroller interfaced with various sensors and modules, including an MLX90614 infrared temperature sensor, an HC-SR04 ultrasonic distance sensor, and an LCD display for output. A KY-019 relay module is controlled by the ESP32 to switch an AC source, with a PTC for circuit protection. Additionally, an AC-to-DC converter powers the ESP32 and a fan, indicating the circuit may be used for temperature-based control applications with visual feedback and actuation capabilities.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Operating Voltage | 230V AC |
| Coil Voltage | 12V DC |
| Contact Configuration | SPDT (Single Pole Double Throw) |
| Contact Rating | 10A at 250V AC / 10A at 30V DC |
| Insulation Resistance | ≥ 100 MΩ at 500V DC |
| Dielectric Strength | 2000V AC for 1 minute |
| Operating Temperature | -40°C to +70°C |
| Mounting Type | Socket mount |
| Dimensions | 34mm x 28mm x 25mm |
The Relay PYF-8 has 8 pins, which are configured as follows:
| Pin Number | Description |
|---|---|
| 1 | Coil Terminal 1 (Positive) |
| 2 | Coil Terminal 2 (Negative) |
| 3 | Common Contact (COM) |
| 4 | Normally Open Contact (NO) |
| 5 | Normally Closed Contact (NC) |
| 6, 7, 8 | Additional socket connections for stability |
Below is an example of how to control the Relay PYF-8 using an Arduino UNO:
// Define the pin connected to the relay's coil
const int relayPin = 7;
void setup() {
pinMode(relayPin, OUTPUT); // Set the relay pin as an output
digitalWrite(relayPin, LOW); // Ensure the relay is off initially
}
void loop() {
digitalWrite(relayPin, HIGH); // Activate the relay
delay(1000); // Keep the relay on for 1 second
digitalWrite(relayPin, LOW); // Deactivate the relay
delay(1000); // Keep the relay off for 1 second
}
Note: Use a transistor or relay driver circuit to interface the Arduino with the relay, as the Arduino's GPIO pins cannot directly supply enough current to drive the relay coil.
Relay Not Activating:
Load Not Switching:
Voltage Spikes Damaging the Circuit:
Relay Overheating:
Q1: Can the Relay PYF-8 be used with a 5V control signal?
A1: No, the relay coil requires a 12V DC signal. Use a transistor or relay driver circuit to step up the control signal.
Q2: Is the Relay PYF-8 suitable for DC loads?
A2: Yes, it can handle DC loads up to 10A at 30V DC.
Q3: Can I use the relay without a socket?
A3: While possible, it is recommended to use the relay with its designated socket for secure mounting and reliable connections.
Q4: What is the purpose of the NC terminal?
A4: The NC terminal allows the load to remain powered when the relay is not activated, providing a default "on" state.