Questions tagged [mosfet]
A type of field-effect transistor. Use this tag for discussing MOSFET circuits.
66 questions
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Microcontroller freezes when triggering the gate of an N-channel MOSFET
Disclaimer: I have asked questions about this project before but this is yet another issue I'm facing.
What I really want to do: Build a battery powered device with 6 colored buttons. When you press ...
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ESP8266 Wemos D1 Mini Pro v2.0 - Load sharing and battery
I have a simple question regarding the new version of Wemos D1 Mini Pro v2.0 and specifically about its load sharing circuitry. Schematic is here :
https://www.wemos.cc/en/latest/_static/files/...
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PWM and attachInterrupts issues
I'm trying to control the speed of a DC current motor with PWM.
I use an arduino UNO to send PWM signal to a mosfet Velleman vma411 to change the average tension of a my motor which is wired to ...
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DFPlayer Mini does not boot reliably after being powered down
For a low power project, I need to power up the DFPlayer Mini module, let it say something, and power it down again using an Arduino Nano (w/o power regulator and LEDs). In the idle time, the Arduino ...
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I have a problem trying to limit motor speed to a certain RPM using a MOSFET trigger switch module
I am using the potentiometer to control the duty cycle of a PWM signal to the MOSFET trigger switch module, thus controlling the motor speed.
In my code, I have used the map function to utilize the ...
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Need help with idea before I buy parts. Want to use arduino to act as the button on a TRRS wire to answer and hang up calls
I intend to buy CH340G USB Microcontroller Board Arduino UNO R3 ATmega328P Development Module
I want to use it and a MOSFET or whatever needed to act as a button for a TRRS wire I already have home ...
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How to control one Mosfet with another mosfet
I've got 4x 12V 6a peltiers and some 3d printer mosfet controllers to drive them using PWM with my arduino. But I've found the mosfets need ~7V to switch on, so I'm now wanting to control them with ...
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Dc motor backvoltage, how to place the diode correctly?
My previous questions have been anwsered, so thank you all for that!
I make a new question post because I have some other problems with my setup. I use a esp12s 8266 chip. It sends a PWM signal to a ...
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How to connect IRLZ44N to Arduino?
simulate this circuit – Schematic created using CircuitLab
In above schematic;
what value should R1 have? is it even needed?
do we need that pull down resistor(R2)? if yes, 10K is enough or we ...
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Understanding MOSFET parameters - Dimming/Switching LED strip [closed]
I'm trying to create a dimmable/ switchable 12v LED strip using an Arduino board and a MOSFET. Many tutorials can be found doing so such as this youtube link.
I've bought a LM317T before I had any ...
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Arduino Driving Pump via MOSFET
I want to turn on a pump that is running 12V and draws a current of max 1.7A with my Arduino Uno.
To do this, I bought the RFP30N06LE MOSFET and followed these instructions to wire it all up.
I ...
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Arduino write to memory and self shut down (over MOSFET) - An idea help
i would like to ask you for help with design of an circuit.
I have and atmega328p, with detection for voltage on its Vin (Vcc).
I have made and voltage divider and its output i connected to Analog ...
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Solenoid "vibrates" instead of pushing
I'm using my Arduino Uno to control a 5V 1A solenoid.
I'm using an N-Channel MOSFET linked to the Uno's 0 pin to switch the solenoid on and off. It is protected by a Schottky diode. Initially, I ...
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Connecting Arduino Arduino to MOSFET
I want to use my Arduino Nano to control a 12V peristaltic pump via a BDX33c N-Channel MOSFET. The pump has a maximum current draw of 1,4 A. The Arduino (via VIN) and the pump are powered by a 12V ...
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Transistor as switch for signal and high current buzzer [closed]
I'm a newbie in transistor switching.
I have PIR sensors with C and NC onboard. NC is 12 V signal that I need to switch transistor (bipolar?) to emit 3.3 V (collector connected to 3.3 ...
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Controlling two-pole contactor using Arduino [duplicate]
I am working with Packard C230C contactor to develop own EVSE. For a simple start i just want to toggle contactor using Arduino. OpenEVSE is already doing it. Just want to know how do they do it and ...
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Wemos mini pro switch power from servo with mosfet bs170
I got a servo connected to a wemos/arduino with a capacitor(470uf). Before I didn`t use a cap.
Now with the cap the device use to much power while sleeping(capacitor on the servo). I want to switch ...
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How to control an 12V 2A Car lamp using relay or MOSFET in Arduino [closed]
I am working with the project controlling an 25W 12V Car lamp. I have a 12V car battery. I want to control it with the Arduino using a relay or MOSFET.
Any suggestion for my project would be ...
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Advice on cabling, packaging and connectors for 12v light project [closed]
My project is to have a 12V solar LED strip lighting system throughout my apartment. This has 6 individual lights, with 5 white and 1 RGB = 8 channels.
I've got the whole setup working on my ...
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Alternative for IRF520 mosfet in Arduino shutdown schema
I’am using IRF520 mosfet according to this schema to shut down Arduino by low level on output to 10K ohms resistor
Schema of my device is
The issue is that IRF520 took too much place
Is it possible ...
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Why is the T2 transistor used in Arduino Micro?
I was about to design a small custom board using ATmega32U4, replicating the Arduino Micro. I know that T1 is used to block VUSB when VIN is connected.
But why T2? The gate is 5V, so it will be ...
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analogWrite mosfet problem
i have a custom atmega328p board which have connected to pin 9 the gate of a MOSFET.
If i run a simple sketch like:
void setup() {
}
void loop() {
analogWrite(9,70);
}
The motor connected to the ...
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Can removing lines of code destroy a motor driver and make it catch fire?
I am making a pid line follower robot. So I was tinkering with code to optimize my line follower when i removed two lines of code unknowingly. As soon as I uploaded my code and started the line ...
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Using a MOSFET module to control DC LED PWM
I've seen some similar questions here for using MOSFET to control 12V LEDs
But apparently the only MOSFET currently available to us is a 2-MOSFET high power trigger module, details in the link below.
...
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Does an I²C IO Expander needs additional resistors for outputs?
I have following setup (see also schematic in the end)
Arduino Nano is connected via I²C to the PCF8575C (link) IO Expander.
Both, SCL and SDA have 10kOhm pull-ups to 5V.
The Expander pins are ...
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