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Actually, I did everything based on the learning video I am watching.
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There is no breakpoint. I have shared the picture where it stuck and breakpoints in keil are in red color.
Hi everyone,
As a beginner I want to learn freeRTOS. Accordingly, I need to have access to the debug section in the KEIL. I test debug with two STM32 Dev Board including bluepill (stm32f103) and blackpill (stm32f401) but when I press run it stuck in one line it does not run to the next steps...
I had made a mistake in soldering and c9 had not connected to the track of pin 2 so there was not v ref now it is solved.
Now how can I make the time and also sensivity of output adjustable ?
As breadboard was not realizable I put it aside. Now I am testing on PCB. The crystal is totally near to the IC and tracks are as short as possible. I had supposed SQW pin is making an square wave. With this pin how can I
Thanks for sharing these information. I should take them into...
Before applying the changes that you suggested, I should say there is a problem in the first V ref (pin2) I have no stable signal so first v out (pin 1) is zero.
By the way, Output of (pin S) sensor on pin 3 is around 0.8 which I think is normal.
After using different values of load caps (15pf and 12 pf) for crystal, it was not precise at all. It was just sometimes faster and sometimes slower. it even has drift in one day. So I realized caps are not the issue.
I checked my crystal waveform on oscilloscope and its frequency. that was...
Hi everyone, I have a problem in circuitry of PIR. I am using the model D203B of PIR and I used a schematic (first picture) based on its datasheet. I do not no why it does not work. The connected LED to the output of IC (op-amp lm324) is always on. I have checked the health of lm324 and all the...
I knew that the breadboard test was not reliable I just wanted to do this test before testing it on PCB, However, I did not to expect to see such drift with caps. This time I will test it with 12pf caps on PCB and I will share the results here.
By adding 15 pf caps to the crystal it showed different behavior but it is not still accurate.
Without 15 pf caps, ds1307 was about 20 seconds faster per week.
Then I made two circuits on bread board by 15pf caps.
After one week one of them was 12 seconds slower and another one was 18 second...
It is not really complex to test short circuit. Simply with continuity mode of multimeter I checked + and - of power output, then surprisingly I heard the beep sound.
can't we say output caps are the reason? If so, do I must to change them although I have the voltage in the output.
Hello everyone,
My computer power supply is short circuit in the output when I test it by multimeter, although it has all the voltages including 12, 5 and 3.3. So what is the reason of that while it provides these voltages and works without problem, but it is short circuit. Is it dangerous to...
In security systems, How motion detectors (with PIR) are connected to the control panel wirelessly? Which components are required to do this. I am going to share some pictures of motion detectors board that that I have found on the Internet. Can somebody realizes the component that is used for...
Hi every one
I want to learn about security systems and make one of them as high quality as the industrial ones.
Here, my question is how to connecte motion detector sensor (PIR) to the control panel. What I mean is which component I need to provide.
Unfortunately, I could not find any schematic...
DS1307 approximately is 20 seconds faster than real time per a week.
for the second question, the more accurate the better. If I could decrees this drift to its minimum that would be awesome.
Based on the comments, I should add 12.5 pf caps to the crystal. So I have ordered the caps. However, In...
DS3231 is much expensive, I need a cheaper one. but I hoped to fix this drift with code
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Thanks I have not added caps to the crystal, maybe I should try it
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I hoped it would have a fix amount of drift per day or month to compensate that with code. But as it does not have...
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