New answers tagged protection
As mentioned in my comment, it feels like guessing what is happening and trying to counter that. Here is a concept to prevent power spikes from getting to the sensor: simulate this circuit – Schematic created using CircuitLab D1 and D2 should be Schottky type, eg BAT43.
I think it will be OK. On page 3 it has this: - 1,000 VAC, 50/60 Hz for 1 minute between contacts of same poles, between terminals of the same polarity And if there is any doubt still in your mind then you can wire contacts from the same relay in series. And if there is a doubt about this, each contact can be in parallel with a small non-polarized ...
Here is how I solved it. It might not work for everyone in my situation but that was good enough for my need. Since I'm restricted by mode 3. I decided to use mode3 (prevent reading and writing for flash and eeprom). Therefore I will be providing my program + the data to the customers in an encrypted file that can only be opened by my desktop application, ...
Datasheet page 2: Typical application.: Vref1 is connected to GND Vref2 is connected to Vcc. The question is what is the IO voltage? You should connect to a Vcc voltage that is a least higher than the max voltage into the IO you want to protect. And it might be very good to add a decoupling cap between the Vref2 pin and the GND plane to provide a ...
No, there is not. Consider adding an external I2C or SPI EEPROM/flash if you need externally-writable space while having the on-board program flash be unreadable. Not only will this solve your immediate problem, it can also give you much more space in which to store your data, either supplied or generated.
If all you're measuring is a voltage(DC Signal) with the ADC you can probably get away with just putting a small capacitor(~~22nf) to ground to ground along with a voltage follower [a very simple op amp configuration that basically relays a signal while giving the arduino some isolation from noise]. Pretty much any op amp you have laying around will work. An ...
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