All Questions
6 questions
-1
votes
1
answer
237
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Zero Crossing Detector
Thanks for your help in advance!
I'm doing a zero cross detector for a microcontroller, PIC16F15223. I will be reading this as a digital input, and not as analog. The circuit is posted below. I know ...
- 155
1
vote
1
answer
443
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Using VBUS instead of the USB port to power a MCU
I'm using an EK-TMC123GXL, for now powering it from the PC. I have found some problems with some pins (ADC, PWM) that doesn't arise if I power it up applying 3.3V to its VBUS pin instead of connecting ...
- 1,395
10
votes
2
answers
17k
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What are VDDA and VSSA?
What do VDDA and VSSA mean? Are they for a separate analog power supply? What is an analog power supply in this context? How does it differ to a digital power supply? Which one is better to use and in ...
- 129
4
votes
2
answers
1k
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How to read STM32F407xx Microcontroller Power Schematic?
I am working with an STM32F407xx microprocessor to analyze incoming signals generated by some hydrophones in a sonar system. At this point in time I am just reading through the datasheet and trying to ...
- 181
0
votes
1
answer
381
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Power supply unit from 230VAC to 12V, 5V, 3.3V DC [closed]
Is this power supply correct?
The capacistors are for decoupling. This power supply is for:
2x 2W fans
4x sensors (simple temperature, humidity)
uC PIC24
*(the component 'Regulator' is LM7805)
*(...
5
votes
2
answers
751
views
Pulse generator and source supply connection
I need a signal that most of the time will work as a power supply for the microcontroller but at some external event a positive pulse will be generated and added to the normal power supply. Power ...
- 51