Contents
What is the maximum voltage to be accepted for microcontroller?
The maximum input voltage is 5.5V. That is what the pins can withstand without damage.
What is the voltage of a microcontroller?
A microcontroller can take actions in the world by changing the voltages of its output pins. Output pins typically take on two discrete voltages (usually 0 and 5 volts). Each output pin reflects the value of some bit in the microcontroller’s memory.
How high does voltage affect electronics?
Voltage that is too high can cause premature failure of electrical and electronic components (e.g. circuit boards) due to overheating. The damage caused by overheating is cumulative and irreversible.
What is the voltage of fan?
Voltage, Current, and Wattage
| AC FANS | FANS |
|---|---|
| Voltage Range: Higher voltage ratings above 100. Common | Voltage Range: Lower voltage ratings below 100. |
| AC voltages include 110, 115, 120, 220, 230, 240 | Common DC voltages include 3,5,12,24,48 |
How to sensing high voltage to microcontroller?
As this is just (you said) for AC mains presence sensing then you can accept something that gives a pulse for part of each half cycle. They say CTR min = 50% at I_LED = 5 mA. So a 10 k output resistor will give up to V = IR = 5 mA x 50% x 10K = 25 V swing. ie it will be easy to swing rail-rail on a lower voltage supply with 5 mA input.
When to use an I / O pin in a microcontroller?
There it will tell you maximum I/O pin injection/clamp current allowed when the input voltage exceeds the micros VDD or VSS.
What should a 10 K output resistor give up?
So a 10 k output resistor will give up to V = IR = 5 mA x 50% x 10K = 25 V swing. ie it will be easy to swing rail-rail on a lower voltage supply with 5 mA input. So you could tolerate even less than 5mA mean current, so lets start with ~~~= 5mA at peak Vin of about 310V.
How does an under voltage protection device work?
In, an overvoltage and under voltage protection device was implemented whereby, two OP-Amps (LM741) were used as comparators (each for under voltage and overvoltage) to compare the supply voltage with fixed reference range. Once the supply voltage is outside the prescribed range, above or below, the supply to the connected load is cut off.