Unanswered Questions
1,111 questions with no upvoted or accepted answers
4
votes
0
answers
190
views
Review of electric circuit with Arduino
I am currently working on a project for which I am in charge of the electronic circuit. Since I have never worked with electronics before, I am really desperate and unsure whether what I am doing is ...
Null♦
- 7,623
3
votes
0
answers
76
views
How does online code editing work in a PLC?
Some PLCs, such as Allen Bradley CompactLogix, allow "online" changes to be made to the running program on the PLC. These changes are (almost) instantly applied and don't require the PLC to ...
- 9,270
3
votes
0
answers
300
views
Nema 17 Stepper Motor Weak Torque (A4988, Arduino)
I'm attempting to run a Nema 17 stepper motor using the common A4988 stepper motor driver. I'm running the motor with a Teensy 4.0, an Arduino-based microcontroller.
The main issue I'm running into is ...
- 177
3
votes
0
answers
81
views
DAC not recognized by I2C and creates strange side-effect
Let me preface by saying that I am new here, and I can't seem to solve this problem for the life of me.
Problem: I am using the LTC2655BIGN-H16 DAC and attempting to interface with it via I2C with an ...
- 85
3
votes
0
answers
69
views
Minimum circuitry for robust operation of the "new" ATtinys (1614) with Optiboot
I have spent hours now trying to catch up on the replacements for the old ATtiny's, there does not seem to be a robust (meaning, with protections that we could find in an UNO or Mega for example) ...
- 9,270
3
votes
0
answers
134
views
Running a 12V motor on 9V battery and arduino and matlab implementation
I have a DC geared motor rated at 12V and 60 rpm . It has a quadrature encoder with 700 PPR. I connected it directly to a 9V battery (almost new) and wished to measure the rpm of that motor. To find ...
- 71
3
votes
0
answers
174
views
Nokia display stopped working
I had plenty of Nokia displays so I decided to use them with microcontrollers.
I found pinout instructions from here, connected one of the 3310 LCDs with my ESP32 because it runs on 3V3, and used ...
- 518
3
votes
0
answers
292
views
MCU, N-channel MOSFET, ~15m led strip, 24V power supply. Whats happening?
Disclaimer
Hi,
Firstly, I'd like to underline, that I do not have masters degree from electrical engineering and I didn't study electrical engineering on high school. I'm software engineer who likes ...
- 131
3
votes
0
answers
384
views
I2C connection randomly dies with error 4
I am trying to interface an ESP8266 microcontroller with an ICM-20948 IMU chip.
Using the reference code from Invensense, the internet and trial and error, I managed to configure the chip do do 9-axis ...
- 241
3
votes
0
answers
147
views
Arduino Every Nano with 3.7V Li-Po - Reading voltage
I have Arduino Every Nano and 3.7V Li-Po battery (Akyga LP903759). I want to read the current voltage of a battery using analog pin. If I use a 50 kOhm and 200 kOhm resistor (in voltage divider) I'll ...
- 31
3
votes
0
answers
225
views
Replacing an ammeter with voltmeter?
I have found this circuit of a millivoltmeter, and it seems like something which as a hobbyist I can do it, and the range of the measurement is very suiting one of my projects, but I would like to ...
- 72.5k
3
votes
0
answers
428
views
Transimpedance AMP, Active HPF, phototransistor
So this is the part where I would like the phototransistor (TEMT6000X01) to be able to clearly capture an LED with a frequency flashing on and off at 1kHz. So what I have here is a transimpedance ...
- 137
3
votes
0
answers
94
views
one sided touch sensor?
I am trying to create a glove that translates sign language into text. To do this i need touch sensors placed on the glove, however the only sensors that i can find detect a change in electromagnetic ...
- 31
3
votes
0
answers
859
views
PWM to synth control voltage improvements
Just built this little circuit to control my Moog Werkstatt. The plan is to make a MIDI-to-CV converter and add more CV outputs and of course a GATE output later. But before going further, I thought I'...
- 43
3
votes
0
answers
943
views
A curious 433 MHz signal to decode
I bought a cheap set of remote controlled power sockets and I want to integrate them into my home automation system. So I got a 433 MHz receiver for 1€, connected it to my Arduino and tried to decode ...
- 141