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Schematic symbol of Raspberry Pi Pico Rev3 board schematic
Boot Select button Disable Flash boot(force USB boot)

Boot Select button
Disable Flash boot(force USB boot)
5y
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1
explain to me an air core inductor as if I was a child

W

wren.sapphire31185

2y
Hello! How can I assist you with your Raspberry Pi Pico Rev3 board schematic today?
2y
W

wren.sapphire31185

explain to me what an air core inductor does as if I were a child
2y
Sure, let's think of an air core inductor like a magic trick. You know how magicians can pull never-ending handkerchiefs out of a hat? That's a little like what an air core inductor does with electricity.
You know how a spring can be all squashed together and then, when you let go, it bounces out? That's because it was storing up energy. An air core inductor is a bit like the spring, but instead of storing bounce, it stores an electric current.
When a current flows through the wire of the inductor, it creates a surrounding magnetic field, like a magical invisible force field. This is like the spring pushing outwards. If the current stops or slows down, the magnetic field starts to collapse back into the wire. This is like the spring squashing back down, but here's the magic part: as the magnetic field collapses, it makes the electric current start to flow again!
So in a circuit, an inductor helps to keep the current flowing in a smoother way, even when it might be changing quickly. It's like a little magic trick to keep the electricity flowing smoothly.
2y
W

wren.sapphire31185

explain to me an air core inductor as if I was a child
2y
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7
ADC GPIO pins have diode to VDDIO (other GPIO do not) FET stops leakage through ...

ADC GPIO pins have diode to VDDIO (other GPIO do not) FET stops leakage through ADC3 pin diode into 3V3 net when 3V3 supply is off (VSYS present but 3V3_EN low)
5y
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2
40 Pins connector

40 Pins connector
5y
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5
PS=0: PFM mode (default, best efficiency) PS=1: PWM mode (improved ripple but mu...

PS=0: PFM mode (default, best efficiency)
PS=1: PWM mode (improved ripple but much worse efficiency at light loads)
5y
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4
ADC current = ~150uA For best performance use external 3.0V shunt ref (e.g. LM4...

ADC current = ~150uA
For best performance use external 3.0V shunt ref (e.g. LM4040)
For lower offset (at expense of noise) connect VREF to 3V3 with lower resistance
5y
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3
C5
Capacitance
47 F
GPIO23
R6
Resistance
100 Ω
R3
Resistance
100 Ω
3V3_EN
VSYS
L2
Inductance
20 nH
U2
Name
Section
Pin Group
Orientation
Order
Sub-symbol

Raspberry Pi Pico Rev3 board schematic

Raspberry Pi Pico Rev3 board schematic thumbnail