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your replies are always useful::thumbsup:
I used two Arduino as master and slave to produce the 16 PWMs with F=31khz. (by modifying some registry codes to get this freq.)
maybe I start to learn FPGA.
thank u,
do you have any other suggestions for producing 16 PWM signal?
I use Arduino mega 2560 and pca9685 for low frequency. and i know that pca9635 could be used for 96khz PWM.
but what can I do for 50khz?
do you know any other PWM ic that could be controlled with a microcontroller?
Hello every one.
pca9685 has an external clock input pin.
and its maximum output frequency is about 1.6khz as mentions in the datasheet.
can we increase the output frequency using a 50MHz crystal oscilator?
or is there any other way to increse the output frequency?
i want to make 16, 50khz pwm...
hello
i want to design a 200 or if its possible a 300watt LED driver for 4 or 6 series connected 50w cob.
which topology and which ic can i use?
(input voltage:220vrms)
thank you.:bsdetector:
:clap:thank u for ur advice;
but this is not my own circuit,
https://ieeexplore.ieee.org/document/6755501/
i have designed an isolated one before,but not published yet.
but GNDs in first side and second side of tlp must be different,(lpc has one supply and tlp has another one for itself).
about the voltage measurement the GNDs from resistors to lpc have different voltages,so i think this is the problem, on the other hand if I measure the voltage from ground to...
this is my complete schematic
as you see i have two voltage feedback
i think i have found the problem,represented with red arrow in below picture, is it correct?
but now how can i sense two voltages and connect them to two ADCs?
please check it connections to lpc,
thank u all.
where will be short circuit?
if i sense 220-GND two GNDs(i.e. circuit,and micro's and also optocoupler's GND) will be connected together,right?
and as you know ADCs maximum input voltage should be less than 3.3V
should i isolate the adc part of micro from power circuit?
Hello every one!
can i use this circuit to sense the output high DC voltage with ADC of LPC1768?
i have connected it to lpc like this:
two of my LPCs have burnt:shock::!: with this circuit.
what is the problem?!
thank in advance
hello everyone
what is relation between line filter cutoff frequency and power supply frequency?
i have a flyback converter with 100KHz switching frequency,how can i design a LC input line filter for it?
thank in advance.
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