Questions tagged [electronics]

Use this tag to ask about electronics-related issues with your Arduino. For example: driver transistors, Ohm's Law, current-limiting resistors.

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How to connect accelerometer, GPS, microphone and a GSM module to a Arduino? [closed]

I am a noob in the Arduino world and have only started reading about it. I have zero experience with Arduino some suggestions to increase my level will also be highly appreciated. But I have a lot of ...
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2answers
2k views

Making three led's blink at different times in Arduino

I have a breadboard connected to an Arduino Uno, 220k resistors connected to an led, of course it has a common ground and a pin connected to 5v. All pins are digital. Now, I want led 1 to turn on ...
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2answers
79 views

Easy bipolar motor control?

Is here some easy way to control bipolar motor without using any other external devices, drivers or shields? I have small motor from CD-ROM so I expect it's low voltage. By control I mean just ...
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3answers
1k views

Moving motion sensor?

Long story short, I'm trying to build some form of device that you can wear and it will detect when something moves behind you. I wanted to use PIR sensors for the motion detection, but I have no idea ...
2
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2answers
717 views

Unable to create a desired periodic signal with Arduino Mega 2560 and DAC0808

I wrote the code to produce the periodic signal by using arduino and DAC0808 where i turned on and off the respectively pins of PORTA by using a logic in iterative manner and created the periodic ...
2
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1answer
125 views

NodeMCU Power supply

I got a question about externally powering my NodeMCU V3. It has an onboard voltage regulator (3v3) which breaks out to 3 header pins. Now I want to power 3v3 from an external board. Can I supply 3v3 ...
2
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2answers
685 views

Powering Atmega328P-Pu externally [closed]

Please I'm new to Arduino and I need assistance. I'm working on a project which makes use of the ultrasonic sensor to make a certain pin high if a certain distance is attained. When I used the USB ...
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3answers
567 views

arduino boot loader problem

I am using atmega 328pu instead of atmega328p-pu. I am trying to upload the bootloader using AVR pocket programmer. I have changed signature from 0x1e 0×95 0x0F to 0x1e 0×95 0×14. (Relevant link) ...
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2answers
100 views

Getting started [closed]

so I am not a newbie to computers or programming. I regularly program in C# and Java, know quite a bit about computer hardware and operating systems. But I am bored of writing stupid calculators or ...
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1answer
476 views

5V pin output on arduino

Sorry for the newbie question (just started learning electronics). I just saw a tutorial that says that the 5V output pin on the Arduino delivers more amps (if needed) when connecting more voltage to ...
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3answers
4k views

Unable to receive and print SMS on the serial monitor with Arduino Uno and SIM900A

I'm trying to receive an SMS and show it on the serial monitor. My code is as following: void setup() { Serial.begin(2400); Serial.write("AT+CMGF=1\r"); //set GSM to text mode ...
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4answers
149 views

Detect if laptop is on or not?

How would I safely connect an Arduino so that it can detect if a laptop is on or off? The Arduino would be powered separately by a normal USB charger, since it needs to be turned on even when the ...
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2answers
964 views

How to power Arduino nano and LED strip?

I am making a project that uses an Arduino nano and a sound detector module to power a 1m LED strip. I got the idea from this video and I am not sure how to power it. My LED strip flashes for a split ...