Design with Resettable Fuse PTC in Cirkit DesignerA Resettable Fuse PTC (Positive Temperature Coefficient) is a protective electronic component designed to limit the flow of excessive current in a circuit. Unlike traditional fuses, which must be replaced after a single use, a PTC fuse automatically resets after the overcurrent condition has been cleared and the unit cools down. This makes them ideal for a wide range of applications where overcurrent protection is necessary but manual resetting or replacement of fuses is impractical or undesirable.
This circuit is a basic power control system that uses a rocker switch to control the flow of 220V power through a resettable fuse and a PT100 temperature sensor. The switch allows the user to turn the power on or off, while the fuse provides overcurrent protection and the PT100 sensor can be used for temperature monitoring.
Open Project in Cirkit Designer
The circuit includes a Benedict Switch connected in series with a Fuse Holder and an SPD (Surge Protection Device). The SPD is also connected to a Ground reference. This configuration suggests that the circuit is designed to control power flow, protect against overcurrent with the fuse, and guard against voltage surges with the SPD, with a safe path to ground for surge dissipation.
Open Project in Cirkit Designer
This circuit is a temperature control system that uses a thermocouple to measure temperature and a PID controller to regulate it. The PID controller drives a solid-state relay (SSR) to control an external load, with power supplied through an AC inlet socket.
Open Project in Cirkit Designer
This circuit features an Arduino Mega 2560 microcontroller connected to a 4x4 membrane matrix keypad and a 1-channel relay module. The Arduino is programmed to interact with the keypad inputs and control the relay, which switches an AC supply connected to a PTC air heater. The purpose of the circuit is likely to allow user input via the keypad to control the heating element, potentially for a temperature regulation system.
Open Project in Cirkit Designer| Pin Number | Description |
|---|---|
| 1 | Current Input |
| 2 | Current Output |
Note: The PTC is a two-terminal device, with the current flowing from pin 1 to pin 2.
Q: Can a PTC be used multiple times? A: Yes, a PTC is designed to reset itself after cooling down, allowing for multiple uses.
Q: How quickly does a PTC reset? A: The reset time can vary based on the PTC's design and the severity of the overcurrent condition. It can range from a few seconds to several minutes.
Q: Is a PTC the same as a thermistor? A: While both PTCs and thermistors have temperature-dependent resistance, a PTC is specifically designed to protect against overcurrent, while thermistors are generally used for temperature sensing.
Q: Can I use a PTC with an Arduino UNO? A: Yes, a PTC can be used in circuits involving an Arduino UNO for overcurrent protection.
// Example code to demonstrate the use of a PTC with an Arduino UNO
// This code does not directly interact with the PTC but shows a typical setup.
void setup() {
pinMode(LED_BUILTIN, OUTPUT); // Set the built-in LED as an output
}
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // Turn on the LED
delay(1000); // Wait for 1 second
digitalWrite(LED_BUILTIN, LOW); // Turn off the LED
delay(1000); // Wait for 1 second
}
// Note: The PTC would be placed in series with the LED or other components
// to protect against overcurrent. The code itself does not control the PTC.
Remember to keep the PTC's specifications in mind when designing circuits with the Arduino UNO to ensure proper protection.