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Is it really bad idea to leave an MCU input pin?
I’ve heard that leaving a pin floating on an MCU when configured as an input (vs. the default output) is bad for the pin, and can eventually cause it to fail prematurely. Is this true? N.B. in my Stack Exchange Network
Is it really bad idea to leave an MCU?
Leaving a pin configured as an input floating is dangerous simply because you cannot be sure of the state of the pin. Like you mentioned, because of your circuit, your pin was sometimes LOW or sometimes in no-man’s land or could sometimes go to HIGH.
What happens if you backfeed a generator cord?
A Generator Backfeed cord introduces electrocution hazard. If the plug inside the house falls out of the appliance outlet, the cord has 240 volts across its terminals. Anyone stumbling onto the cord or tripping over it may receive an electric shock. Thus the aptly named Generator Suicide Cord.
Is it illegal to backfeed a generator in an apartment?
Backfeeding a house, an apartment, or business is a dangerous practice and illegal in some jurisdictions. People who backfeed their houses connect the generator to an outlet with a homemade cord fitted with two male plugs.
Why is floating input pin bad for microcontroller?
Like you mentioned, because of your circuit, your pin was sometimes LOW or sometimes in no-man’s land or could sometimes go to HIGH. Result: Essentially, the floating input WILL definitely cause erratic chip operation or unpredictable behaviour.
Is there a reason to float an input?
A floating input could cause input noise, even if that input is not being used for anything. This could result in increased EMI and increased power consumption. There is no good reason to do this.
How does a floating pin affect a circuit?
One of the most basic of the faults is the infamous “floating pin” or “floating input” that can affect the I/O pins of digital integrated circuits. To best explain a floating input and how it can negatively affect your project consider the circuit in Figure 1:
What happens if you leave a pin floating on a microcontroller?
When pins are floating, current can leak in and out of the pin. leaky+current = bad leaky + current = bad. So, don’t leave pins floating.
Why are my I / O pins floating on my circuit?
Many times these faults are fixed with a very simple tweak to the circuit design or component selection. One of the most basic of the faults is the infamous “floating pin” or “floating input” that can affect the I/O pins of digital integrated circuits.