All Questions
8 questions
0
votes
3
answers
570
views
Problem with Interfacing of Multiple I2C Sensors
Problem Description
I'm working on a project involving multiple Proximity sensors (AdaFruit VCNL4040). There are 8 such sensors interfaced through a I2C multiplexer (NXP PCA9547). Additionally I need ...
- 3
0
votes
5
answers
834
views
Isolated mains sensor
I’m building a mains sensor that should be able to operate safely at a voltage of up to 650VAC. I’ve already built one before, that operated with 130VAC, which I successfully monitored with a MCU, and ...
2
votes
2
answers
2k
views
Capacitive touch insulation problem?
I have an "U" shaped metal profile that is 2 meters long each side is 1.5 cm.
It is sprayed with acrilic color. and i want to use it as indirect light profile/enclosure for a 12v Led strip.
While ...
- 547
1
vote
1
answer
2k
views
Voltage sensing using Arduino with and without common reference
I wish to make a voltage sensing circuit (range -15V to +15V) using an Arduino's ADC. The problem is that since this circuit will be part of a much larger circuit in which the Arduino is performing ...
- 47
0
votes
2
answers
3k
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Detect if input voltage is 110V or 230V signal
I'm building a small electronic project that will measure the power consumption of a device and send this back to Arduino or ESP2866.
I've figured out how to measure the current that goes trough a ...
- 123
0
votes
1
answer
283
views
Lm35 arduino and battery
I am doing a project where I need to measure temperature using lm35. I am using arduino's analog A0 to measure, I light up extra LED on an other pin while measuring. Suddenly the alarm triggers. I ...
2
votes
1
answer
2k
views
Current, Voltage, and Power Sensing for 115 V AC Circuits
I am trying to sense voltage, current, and power with an Arduino (Due) for monitoring and diagnostic applications. To get reasonably good input (better than Kill-A-Watt), I have designed an AC sensing ...
- 173
1
vote
1
answer
570
views
Can I Use Current Sensing Transformer Instead of Power Transformer
This is a follow-up on this question:
How to Design Arduino Voltage and Current Sensing Shield
Thanks to user bigjosh, I read the article:
http://openenergymonitor.org/emon/buildingblocks/measuring-...
- 173