Questions tagged [fuses]

Refers to the component fuse that acts as a sacrificial device to provide overcorrect protection.

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3answers
4k views

Protecting your computer from stupid (arduino) mistakes

I recently ran way to much voltage through my Arduino and back into my computer via the USB connection. I'm looking for a USB hub with a fuse or some sort of protection to protect my laptop from these ...
3
votes
1answer
1k views

How do I read the fuse bits from within my sketch?

How can I read the fuse bits from within my sketch?
3
votes
1answer
538 views

Which of the clock sources are actually internal to the ATmega328P?

I am trying to determine exactly what all of the fuse settings correspond to on the ATmega328P. The options for the CKSEL bits are: 1111-1000: Low Power Crystal Oscillator 0111-0110: Full Swing ...
2
votes
3answers
3k views

Change Digispark clock speed, run at low voltage?

I have a low voltage (3.2v) application. I was hoping to use the Digispark. I have a solution using a separate Tiny85, but want to use the Digispark USB programming. To run at lower voltage I think ...
2
votes
2answers
50 views

The Time are functions do not work correctly when the processor clock speed is set at 128K

How can I change The timers to work correctly when The processor clock is set to 128K instead of 16 M? At present, using the delay function does not work correctly, The delay is far too long.
2
votes
2answers
591 views

Change the fuses of an Arduino Uno (can an Arduino Uno change its own fuses?)

For now, I'm using an Arduino Uno alone including its 328p (no other external chip to program). I would like to change its fuses to internal 8 Mhz clock (because then I'll move the 328p out of the ...
2
votes
0answers
164 views

Atmega 32U4 doesn't show on device manager after fuse bits reset

I am finally ready to try setting fuse bits on my ATMega32u4-AU custom board (8Mhz Ceramic Resonators, 3.3V), however, after I set the fuse bits and plug my board to computer, the device manager ...
2
votes
0answers
63 views

check if a fuse is good or bad in an ac circuit using arduino [closed]

I have a fuse in a ac circuit of which i want to check if the fuse is ok or not. I'm wishing to wire up two nodes of the fuse holder and determine the fuse status. I have a plan of notify user if the ...
1
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1answer
885 views

Can the Arduino (Nano) bootloader be updated via itself and the Arduino IDE or is an ISP required?

I ran into the following error with a recent Arduino IDE version (1.8.9) when trying to upload to an "Arduino Nano" clone (ATmega328P): avrdude: stk500_recv(): programmer is not responding avrdude: ...
1
vote
1answer
237 views

Uploading to atmega328 over serial with arduino bootloader running at 2MHz

I want to run an atmega328 on a breadboard at 2MHz and upload to it via the serial pins (pins 2 and 3). So I am setting the clock divide by 8 fuse bit to enable this, meaning the atmega runs at 2MHz ...
1
vote
2answers
601 views

ATtiny85 serial communication, bootloader and setting up fuses

I have been reading some articles about ATtiny and how to burn the bootloader. And I have two questions which I can't figure out. Do I need to manually setup fuses to run 8 MHz on my ATtiny when I'm ...
1
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2answers
4k views

Program ATtiny13 - 20PU

I'm trying to program my ATtiny 13 - 20PU. An it seems to work, but there is no action upon the "delay" command. If on the sketch below I comment out the "High" line, my led is off all the time and ...
1
vote
1answer
729 views

What is the capability of AVRISP and USBASP on ATMega48, 328, 2560?

For use with ATMega 48 (old Arduino?), 328 (UNO, Pro Mini) and 2560 (Mega2560) chips, what is the capability for the AVRISP and USBASP programmers on: Can it read, write fuse? Can it read, write ...
1
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1answer
203 views

Errors trying to set fuses on bare Atmega328p

I have an Atmega328p on a board that I want to program using an Arduino programmer. I've got the programmer working to program other Arduino's over ICSP header, but when trying to use the same ...
0
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2answers
173 views

Atmega328p low voltage [closed]

I am using atmega328p in my PCB prototype, due to some reason I can use only 4 volt for power supply. My question is that "How to run atmega328P through 4 voltage"
0
votes
1answer
27 views

circuit breaker/fuse necessary for IoT home monitor?

In most 12v CCTV power supplies, each power cable is behind a glass fuse. I haven't seen fuses or circuit breakers used when distributing 5v power used in IoT projects. Is there a reason overcurrent ...
0
votes
1answer
828 views

Restoring all fuse bits on AtMega328P-PU

I'm worked with Low Fuse bits in AVRDUDEPROG 3.3. Fuses was non-inverted. And by mistake I enabled SUT1 and SUT0, when SUT0 was enabled. And when I programmed avr, it shows me error that avrdude.exe: ...
0
votes
1answer
833 views

Pro Mini Fuse Repair

It looks like I broke my Arduino (Compatible) Pro Mini board using AtmelStudio to change the fuses. I was having trouble with speed and using some basic sketches. For example, the LED blink was on for ...
0
votes
1answer
169 views

Is it difficult to do high voltage parallel programming using Nick Gammon library?

I have bricked a few AT328P by invalid fuse settings. Has anybody used the above sketches and the associated circuitry to perform high voltage programming?
0
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1answer
483 views

MCU fuses used by Pro Mini and ATMega 2560 and power down

In context of Pro Mini and ATMega2560 Fuses, as documented in chip factory doc are complex topics (I have not really used it before), appreciate pointers and advises, to narrow down those that are ...
0
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1answer
42 views

Atmega32A fuses

I have Atmega32A and 16 MHz quartz, with 22pF capacitors. Tell me, please, how to set the fuses correctly so that the MK works from external quartz. Will MK work when setting 0xFF LOW and 0xD8 HIGH? ...
0
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0answers
27 views

Prevent reading flash from Arduino (Pro Mini for example) with fuses

The situation is the following: I'm uploading code to Arduino board using USB programmer which communicates with the board via Tx/Rx serial (so boot-loader remains on the board). I want to prevent ...
0
votes
0answers
262 views

How can i prepare for short-circuit between 5V and GND pins?

My Arduino Uno controls a couple LEDs in a watertight enclosure. I'm running wires from ground, a data pin and the 5V pin into the enclosure. The Arduino is powered through the DC jack. What measures ...