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Results tagged with arduino
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user 187471
Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
-1
votes
Control a 3W RGB LED with an Arduino
Question
How to use Arduino to control 3W RGB LED lamps?
Answer
Update 2021jan22hkt2201
BAD NEWS!!! … References
(1) AliExpress YD-XGJH RGB/RGBW/RGBWY LEDs, 3W/9W/12W/15W, 2/4/6/8 pins - US$5 ~ US$110 (The 3W RGB LED the OP hopes to control by Arduino)
(2) AliExpress Chanzon - Aluminum Heatsink Base Plate …
- 2,956
-1
votes
Smart BMS UART problems
Use Arduino or Rpi to talk to your BMS. Show me the code if you have any problems.
Good Luck and Cheers. … References
(1) Daly Smart BMS UART、RS485 Connection Tutorial 5,035 views 2021Feb25
(2) Rpi to Arduino Serial UART Communication Tutorial - Asked 2 years, 4 months ago Active 1 year ago Viewed 4k times …
- 2,956
1
vote
Can I plug in too many LEDs (i.e. 26) on Arduino UNO?
It is a bit risky to burden the little poor weak Arduino with so many LEDs. … In case greedy you don't have that many Arduino GPIO pins to go around, you can ask another guy for help: PCF8584 8-channel I/O pin expander. One I2C bus can squeeze in 8 PCF8574s, and now Wow! …
- 2,956
33
votes
Accepted
How to properly use a relay module with JD-VCC from Arduino/Raspberry?
Let us focus on the left most two columns, TTL and Arduino. … The photo show the Arduino relay not working with Rpi. …
- 2,956
2
votes
How can I increase the output current to make it sufficient for relay module?
References
(1) How to properly use a relay module with JD-VCC from Arduino/Raspberry? - SE EE 2020jun13 …
- 2,956
0
votes
How to wire this relay with a H/L (High/Low) jumper to Raspberry Pi?
This the the "3V3 Rpi/Arduino High signal is not high enough to switch off relay". You might like to read Reference (1) for more details. … References
(1) How to properly use a relay module with JD-VCC from Arduino/Raspberry?
Notes
(a) Part D explains High/Low level selectable relay using H/L jumper. …
- 2,956
-1
votes
Anything wrong with connecting L298Ns in parallel?
Question
Anything wrong with connecting L298Ns in parallel?
Update 2021mar30hkt1601
Preliminary testing shows that when two full H-bradges are paralleled to drive one motor:
The motor load current i …
- 2,956
7
votes
How can I use a 2N2222 transistor as a temperature sensor?
I'm supposed to use a TMP36 transistor for a class to read the temperature of the environment, but I only have a 2N2222 transistor; the Arduino will have an analog read of it, but the numbers won't change …
- 2,956
2
votes
How exactly does a basic EMF sensor work?
Part C - My original plan was to input this 50Hz, 400 mV peak to peak to Arduino ADC pin and let Arduino to do the ADC and subsequent data processing. … Of course we can also use Arduino to detect the AC 50 Hz signal and do some fancy things, such as use text-to-speech utility to output human voice. …
- 2,956
-3
votes
Why is my PWM efficiency about 50%?
Question
How come my BTS7960 DC Motor Driver using PWM has efficiency of only 50%?
Answer
Well, there are many possible reasons. Perhaps we can do some research to find out the reason.
1. I would s …
- 2,956
2
votes
Accepted
ADS1115 measuring body resistance has a noisy output, how to fix it?
Question
How come human body impedance measurement using ADC such as ADS1115 is so noisy?
Answer
Well, it is your body that is noisy, not ADS1115.
This is a hundred year old problem. The solution …
- 2,956
3
votes
Driving 5V powered relay module from 3V3 powered microcontroller
Question
The OP has a Low level triggered SSR for 5V Arduino. … The root cause is using an Arduino compatible active buzzer for Rpi. …
- 2,956
-3
votes
Is it necessary to use a pull down resistor with this BTS7960?
For the problem: "When I turn on the power supply the motor rotate for few seconds even though the Arduino didn't give orders to turn the motor on yet, ..." … :)
Easy Setup Motor Driver BTN7960/ BTS7960 with Arduino - FireBitLab
Notes
This is a very stupid mistake I never expected to see! I need to confirm the OP if what I saw is true! …
- 2,956
0
votes
Inappropriate readings of pulse and temperature sensor (LM35)
LM35 shouldn't give such an ridiculously inaccurate reading. The spec below shows how precise (+- 0.5°C) it is!
Perhaps your calculation is dodgy! :)
Let me check your calculation. Suppose yo …
- 2,956
-2
votes
Driving step motors using microstep drivers with teensy 4
Question
How to use MCU (Teens4, STM32, Rpi4B, Rpi Pico) and DM542 microstep driver to control NEMA 17 / NEMA 24 stepper motors?
Answer
Short Answer
There are many possible causes of trouble. I ope …
- 2,956