6
votes
Accepted
How safe is it to use my body as part of a circuit?
If you are talking about running at 5V, then I doubt there is any safety issue. After all, 9V batteries (the sort you put in your smoke detector) just have bare terminals and no-one tells you not to ...
- 38.7k
4
votes
Accepted
How to prevent ATTiny program from running after I flash it with Arduino?
This means that if I try to flash the program, ATTiny will start to put PWM power into my Arduino. I don't want that to happen.
Why do you think that is a problem? The "PWM power" cannot be any ...
- 106k
4
votes
Accepted
How can I differentiate between multiple circuits?
First, let's consider the logic of your program. You have two groups of
pins: 6 pins connected to the wires and 6 pins connected to
the terminals. The first thing I would do is forget that ...
- 44.3k
3
votes
What not to do to an Arduino
it is okay to use for simple experiments directly. But while you choose to opt for a complex tasks read the details about all the components and their wiring techniques.
specifically try to check ...
- 443
3
votes
How can I differentiate between multiple circuits?
I would also connect the terminals to the 6 analog input pins and have 6 unique voltages, one per wire. The Arduino will only provide the output when the 6 wires are placed on the correct terminals. ...
- 3,198
3
votes
Accepted
Different voltage sources across Vin and DC jack
wouldnt that then send current through the Vin pin and back to the coin cell battery? Is that what would happen in this instance?
Yep, that's right.
shouldn't there be a design feature to prevent ...
- 106k
2
votes
Accepted
What is a safe way to power arduino nano with 7.4V Lipo battery?
Connect it via the Vin pin. That way the 6-8.4 volt of the battery will go through the voltage regulator on the Nano, giving you a stable 5v.
What you show in your diagram is the wrong way of ...
- 11.3k
2
votes
Accepted
What not to do to an Arduino
A lot of things can happen to ruin an Arduino board, although so far I made mistakes and none has broken. However, possible causes can be:
Electrostatic energy, you can prevent it by buying an ESD ...
- 13k
2
votes
Is it safe to power Arduino project using a power bank and wall charger?
Yes you can. A promini will run very well on 5V from a wallwart. Connect 5V to VCC (not RAW or VIN). You can also find wallwarts with 2.1mm/5.5mm plugs, and a mating barrel jack adapter that ends ...
- 2,423
2
votes
Accepted
Arduino Analog pins go all to high problem
A high voltage at a pin can damage the microcontroller partially.
The ATtiny microcontrollers can sometimes survive a voltage of 7 V.
The ATmega microcontrollers are damaged by that voltage.
The ...
- 3,246
2
votes
Accepted
Detect if laptop is on or not?
If your chosen power supply is of a good quality and provides proper ground isolation then it shouldn't be a problem to connect the grounds of the two systems together.
However, since there are so ...
- 106k
1
vote
Accepted
circuit breaker/fuse necessary for IoT home monitor?
Is there a reason overcurrent protection is not needed in these projects?
You're comparing apples and oranges.
The two systems are completely different and have different concerns.
Case in point:
...
- 106k
1
vote
Accepted
Is Arduino Mega Hackable Over The Air
the bootloader doens't listen on RX/TX3.
to start the bootloader reset is required
to communicate with the bootloader a serial programmer must have STK500 protocol or a telnet bridge for avrdude, ...
- 18.2k
1
vote
arduino circuit review/ safety review
The "Arduino" part of your schematic looks OK. 9 VDC to VIN on the Uno is OK. Connecting the MOSFET directly to the Arduino is OK.
Personally, I would connect a 1000 ohm resistor in series between ...
- 2,531
1
vote
Is it safe to power Arduino project using a power bank and wall charger?
Yes, that is my standard setup for Arduino and Raspberry Pi.
- 51
1
vote
Am I able to connect an anti static wrist strap to the ground pin on the Arduino uno?
I was about to write that I wouldn't do that, but in view of the post I linked to - I am changing my mind.
The point to the wrist strap it to have you, and the thing you are touching, at the same ...
- 38.7k
1
vote
How safe is it to use my body as part of a circuit?
In fact the voltage is almost irrelevant. The current is the issue. 30mA is normally considered the limit - this is the value RCD are set to trigger at.
Even low voltages applied to intimate places ...
- 1,645
1
vote
ESP8266: Is it safe to use pin 0?
It may be stated that GPIO0 is safe to use as an output, but I challenge anyone to show he has actually done it. When configuring GPIO0 as an output I get only oscillations (about 70kHz), loaded or ...
- 11
1
vote
Can I use relays with 10A125V~ for my 220V~ applications, safely?
The part is obsolete now according to Mouser. The simple answer is no, you cannot use a 120 volt part at 220 volts. The higher voltage can breakdown the lower voltage rated parts. It really has ...
1
vote
How cold or hot can my Arduino Uno get?
If you must place your device outside, I would suggest a diecast box. The main heat generating component is probably the regulator (Think about it - at 12V, the reg drops 7V, where the micro runs on ...
- 11
1
vote
How cold or hot can my Arduino Uno get?
I agree with the advice to read the data sheets, but here is a personal answer to the question.
I installed a Raspberry Pi in an enclosure in which the existing Arduino survived last summer.
...
- 1,175
1
vote
How do I erase the memory of the Arduino Uno?
My biggest concern when this happens is I've usually wired the Arduino for my new project and I'm plugging in the USB for the initial download of the new sketch. I worry, having no idea what the ...
- 596
1
vote
How do I erase the memory of the Arduino Uno?
In the Arduino IDE, go to examples, select Eeprom, select eeprom clear and then upload the sketch.
When it is the LED on pin 13 will turn on, you are done.
NB. This may take some time depending on ...
1
vote
How to prevent breaking my Arduino by mistake?
Don't move any wires with the power on. Way too many boards are damaged that way.
- 2,423
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