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Help comparator circuit for this PWM signal inverter
I have 2 signal (signal on the left) and how to combine those 2 signal into the signal on the right, I have try using lm 741 op amp, but unfortunately the output signal is different from the...
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Calculating the input current drawn by a MOSFET driver
I am using a PIC32MZ’s OC pins (PWM mode, fault disabled) as input to a dual MOSFET driver (ISL89163 A). I need one OC pin to drive 3 drivers i.e 6 inputs each. The pulse width would be around...
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Ohmic Power Loss of the Peltier Element (PWM Vs Linear current)
I want to design a circuit to drive the Peltier element. The first option is to drive the peltier with PWM and the other option is to use a sync buck convertor, which is likely adding LC filter to...
View ArticleDimming LED lights with PWM, driver quite far from LEDs, noise considerations
There were a few questions like this before, however I haven’t found ultimate answer yet. I’m going to drive LED lights in my house with multi-channel driver (PWM controller + MOSFET Transistors),...
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What's the peak voltage of the sawtooth generated by the ic SG3525 or UC3525?...
P.S. I need this information in order to make a closed-loop FlyBack CC-CC converter. The Tm transfer function is related to the sawtooth peak voltage: Thanks!
View ArticleIs PWM or voltage control the most efficient way to control a heating...
I am thinking about a heating controller for my electrically heated motorcycle coat. It draws about 6 amps at 14V on my motorcycle. My question is whether it is more efficient to drive a heating...
View ArticlePWM with alternative load
I want to drive an ~220V incandescent bulb with arduino’s pwm, any suggestion about the stage to put between them.
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Best way to convert 5V DC to 110V AC at 50Hz for pdlc film drawing 2mA max....
I’m working on a project in which I’m hoping to integrate several small segments of pdlc film, which starts off diffuse white/’frosted’, turns clear when excited with 110V AC at 50Hz and is apparently...
View Articleswitching power loss calculation in sinusoidal pulse width modulation
How do i calculate the switching power loss in sinusoidal pulse width modulation SPWM in a H bridge inverter (4 IGBTs), and precisely is it linearly proportional to the frequency switching or to the...
View ArticlePWM driven power supply [closed]
As you have asked me, I will explain in better words my problem. I’m working on real-time bench. I have an algorithm on my laptop and I interact with hardware through a calculator supporting real-time...
View ArticleWhere to start on emulating a Pulse Width Modulation
This is a homework assignment and I don’t really want the whole answer just a place to start on this assignment. Here’s what I’m supposed to do. “Emulate a PWM (pulse width modulation) generator. The...
View ArticleArduino Mega ADC error when using PWM
I am building a temperature controller, where I read 16 ADC inputs (thermocouple amplifiers), and at the same time I am using 6 PWM outputs (at 10 Hz). When I am only reading the ADC values, I have no...
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AVR PWM output delay before start
I’m using an ATTINY85 to generate a PWM output (using TIM0 in OCR mode), and this PWM output is being switched on and off an regular intervals. What I am finding is that when switching on the PWM...
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RC filter loss amplitude
I made a RC filter with R=200ohm and C= 2.2uF, I want to filter this PWM in the figure with 10k frequency, and get a Sinusoide with 50hz, but in this case I loss amplitude how i can do this???
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Not sufficient brightness from Constant Current LED drive to 3W mini LED,...
Now, after read my 6 thread tip, no solution clearly given, so I go ahead to my problem. When I power on my 4 LEDs gave fast full flash brightness for 3-4 seconds. That’s a sign that all LEDs are ok....
View ArticleHigh speed (>30KHz) 10-bit PWM generator
I’m looking for a way to generate a high speed PWM signal into a high impedance input gate driver IC. This would be used to replace a lab bench waveform generator. Preferably I would use something like...
View ArticleHow to convert Clock signal to PWM signal?
Let’s say i have a clock signal which i control its frequency making it going from 10Hz to 1000Hz. And i want to convert this to PWM signal, so that 10Hz gives 0% duty cycle and 1000Hz gives 100% duty...
View ArticleUsing Dither to achieve finer PWM resolution
In practical industrial applications (regardless of any particular industry), is there any use for a dither module that goes along with a PWM module considering HRPWM’s are available. With my limited...
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How does a virtual DC bus provide negative dc voltage in transformer less...
How does the topology (1st pic) eliminate Common mode current found in PV panels connected to grid without isolation transformers?
View ArticleTransmitting PWM binary at 400kbps (or 800kbps)
I need to send a string of bits to a chained set of RGB LEDs, each of which have their own controller IC. The datasheet for that IC, the WS2811, is here. The protocol is quite simple: each bit, both 1...
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