Questions tagged [pwm]
Pulse-width modulation, is varying the duty cycle of a rectangle wave, usually with a constant frequency.
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DRV8262 not working with PWM signal
I designed a motor driver with the new Texas Instruments DRV8262 at its core. It will be used in robots controlled by an ESP32.
It works well when using non-PWM signals to switch the outputs in PWM ...
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RC filter to DC 12V, 3A fan PWM
This feels like a question asked hundreds of times before, yet doesn't seem to have a good solution. If a company could sell me a solution, I would buy it in a heartbeat.
I have a van with a 3A 12VDC ...
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PWM on STM32F411 is not working using timer1
I am trying to use this code to control brightness of a LED using channel 3 of Timer 1 (PA10 pin) on the STM32F411:
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Detect presence of 12MHz squarewave without oscilloscope
I have programmed my ESP32 to (supposedly) output a 12 MHz clock signal, to use as a substitute for a broken clock crystal on another microcontroller. The code I used is adapted from this esp32 forums ...
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Motion controller using brushed DC motors
I've designed a simple robot with 2 active wheels and 4 omni wheels and I'm trying to figure out the motion controls.
I'm using 8300 RPM motors (https://uk.rs-online.com/web/p/dc-motors/3213192) which ...
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NUCLEO-L432KC timer PWM frequency problem: PSC and ARR values not resulting in desired PWM frequency
I have been trying all day to use timer 1 channel 1 of a nucleo-L432KC (with a STM32L432KC MCU) to generate a PWM signal of frequency 50 Hz (pulse width 20 ms). I tried many, many, MANY different ...
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C2000 PWM skips a compare on synchronization
I found a mitigation for the problem that I couldn't post to e2e.ti.com because they demand a company email (University won't do). See my self-answer below.
I'm using a TI microcontroller ...
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The resistance value for PWM circuit uses STM32F103C8T6 and MOSFET
I want to design a PWM circuit using STM32f103C8T6 and MOSFET as shown below.
I use MOSFET IRF3708 because Gate-to-Source Voltage low. but low power.
MOSFET IRF3205 has a large power but Gate-to-...
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How to understand the minimum operating time of motor drive?
When researching PWM control of brushed motors, I noticed that the motor drive data sheets usually have the following time descriptions.
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SPWM - Frequency calculation
Below is the SPWM I produced with 50 Hz sine wave and 5 kHz carrier signal. I will use the SPWM signal to drive the MOSFETs in my inverter.
As it is known, duty and period are constantly changing in ...
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Welding machine schematic: PWM controller connections
I don't understand why the VFB pin of the UC3845AD PWM controller is grounded, and why the compensator pin is connected to the output of the LM224 through VD1 and VD2.
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How is the sweep of duty cycle handled in common microcontrollers? [closed]
I have designed a PWM module in Verilog, and it was giving me a glitch. After debugging it for some time, I found that the value of the duty cycle was changing twice within a certain period.
How do ...
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TRIAC Controlled Motor circuit: PWM logic doubt
I'm working on the logic board of my kitchen air extractor. I wanted to "hijack" the controls (physical buttons) to be able to control those with an ESP8266. While I was analyzing the ...
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Debugging the triangle wave generation using ISL7044
I am trying to simulate an Analog PWM circuit as shown in this TI application note.
Link attached here => Analog PWM TI Report
However, I have a requirement to achieve the same using ISL70444 OP-...
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PWM vs mutiplexing, why one can control the apparent brightness and other saves power?
In an LED grid where we are using multiplexing to control a ton of LEDs, where we are scanning each row quickly and using persistence of vision to enjoy the full picture at once; let's say that there ...
