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hello, i am trying to write a program for dspic30f4012. I have a requirement to call a adcvalue() function within an interrupt routine of timer1. This adcvalue() function needs to switch on the ADC. Load the digital values of analog signals at AN0 and AN1 to variables defined as data1, data2. And then again turn down the ADC. This cycle r
Not quite sure what you're trying to do there, but it looks like there's a lot wrong. 1) You've got a diode in series with sensor output which will allow only negative signals through, but your opamp is referenced to ground. I think you want to turn that diode around and maybe put a resistor to ground on the opamp input. 2) Your opamp is open loo
Looks to me like you are driving both transistors on each side at the same time instead of 'crossing over' the drive signals diagonally. I think it will work, but only for one PWM cycle before burning out ! You also have no dead-band period and I suspect the transistors will not have sufficient Vgs to full turn on. Brian.
If the turn ratio of the transformer is wrong and there are more turns in output coil than needed then it will produce higher voltage level in output. The feedback circuit will try to regulate it by reducing duty cycle and you will see a narrow pulse of PWM output especially when there is no load present. .
You have a channel input to route your current through and a channel to route your voltage into. The chip has some options to turn the gain and do filtering for you (which maybe helpful for cleaner signals). It has a selectable output frequency for your controller. So what you would do is: 1.) Set your gain and filter preferences with the G pins
A base-emitter resistor is always a good idea to ensure the transistors turn off. Keith
This resembles the common-base configuration, where the signal is applied at the emitter leg. It is most useful when the incoming signal has low amplitude and low impedance. Example, detecting signals in a wire coil. Suppose we need a microphone, but all we have is a speaker. It is possible to turn a speaker into a microphone. The voice coil wil
Even if your RF system is for on and off only, the received signal should have a specific characteristic (likely a digital key address) so that signals from other transmitters (at the same frequency) cannot turn on or off your device. that is so true ..... I neglected to comment on that in my previous post the
hi am trying to make a pic based inverter circuit. the circuit uses 2 p-channel mosfets(f9540n) with a centre tapped 12-012/230v transformer. i programmed the pic to turn on the mosfets inorder to create modified sine wave. i assembled circuit with o/p of transfrmr open circuited.i switched on the 12v dc supply but within 5s my breadboard got
The 555 can be put to use in a variety of ways. It has several components built into it, and a clever designer might find unconventional methods of applying them. I would not be surprised if the output pin produces PWM signals for the lowermost circuit (which we do not see entirely). In turn, an incoming line goes to the trigger pin 2. I believe i
You could use a 74HCT4066 for this. The chip has four independent analog switches which turn on by a control signal (from your MCU). It is very inexpensive and often used to switch audio signals. There are other, similar choices, including chips described as specifically for a
If you are going to put a DAC in your amplifier, regardless of the 'quality' of components or clock signals, you need to know what format the digital input is going to be. To be perfectly honest, there is very little difference in quality of audio DACs, after all they are only there to turn numbers into a voltage and if the numbers are corect and s
I'd use the cross() calculator function looking for the right-sense zero crossings, and do the arithmetic to turn time into degrees. Timebase being the fundamental period of whichever phase you call the master reference.
Please give us more information on your requirenments for example: There are two motors for each eye ; an up-down motor and a left right motor The signals of the eye detector are eye turned left (boolean) eye turn right(boolean) and the same for up and down The motor will keep on running whilst the eye turned left signal (...)
Hi all, I want to use a load switch as a switch to turn on and off the power to support circuitry that I have. A microcontroller which will be powered ON at all times will provide the control signals. I have a couple of questions on load switches. I was planning to use a Vishay Si1869dh load switch @ Vin = 15V, Von/off = 3.3V. I want the Vo
In my country there is no need to turn off the phone when you go in a bank.
All mopeds have to be equipped with turn signals and brake lights, according to traffic regulations. Some older vehicles of this type don't have those, that is why brake light and turn signals of own production are v
of course it should be nonoverlapped. Or your two switched will burn out if the turn on resistor is too small
hi all. i have a honda cr 250 taht i want to drive on road.but i need to make turning signals and i want to do it myself. i know only the basic of electronics and if someone can help me with it i will be happy! please post if you know anything or you have some questions :-(:-(
Hi T805, If you have experience with microcontrollers, just pick the one you are comfortable with, derive its clock from a crystal to get an accurate time base and just write a code to count the clocks and give out the ON/OFF signals on the ports. You can then drive the turn ON/OFF transistor gates/base with those signals to (...)