Arduino - eTechnophiles Forum

Motor driver not working properly

Noochee — Fri, 20 Feb 2026 22:50:49 +0000

I built an obstacle avoiding robotic car using Arduino, dc motors and a motor driver(L293D) , ultrasonic sensor and servo, i added LCD, a buzzer, an LED and a bluetooth module, but it's getting overloaded i guess and it doesn't work, what do i do?

How can servo jitter be reduced in Arduino projects?

Anil_Tech — Tue, 21 Oct 2025 06:24:54 +0000

I’m controlling a servo motor using an Arduino, but it occasionally jitters even when it’s supposed to hold a fixed position. The power supply seems stable, and the signal wire is properly connected. What are the common causes of servo jitter in Arduino projects, and what are the best methods to minimize or eliminate it?

Are there any hardware or software techniques—like adding capacitors, using separate power sources, or applying code-based filtering—that can help achieve smoother servo movement?

EXPERTS IN CLEANING SOLUTIONS

laborasphere — Mon, 22 Sep 2025 21:49:27 +0000

EXPERTS IN CLEANING SOLUTIONS

Welcome to the future. Professional services for cleaning currency and notes of all kinds .

@BRAZIL SSD CHEMICAL SOLUTION +27672716140

popohu — Sun, 21 Sep 2025 07:14:21 +0000

@BRAZIL SSD CHEMICAL SOLUTION +27672716140,ssd chemical solution in dubai+27672716140,ssd chemical in limpopo+27672716140,ssd chemical in kuwait+27672716140,ssd chemical in uk+27672716140,ssd chemical in switzerland+27672716140, to purchase Best SSD Solution Clean Black Notes Dollars WE ALSO? SALE CHEMICALS LIKE SSD AUTOMATIC SOLUTION FORM CLEANING BLACK DOLLARS CURRENCIES. I hereby use this media to inform you, that our company can clean out black deface currency, (stained money) bank notes, We have all kinds of chemicals used for cleaning of black money or stained money in currencies such as U.S Dollar, Euro, Pound, and all local currencies

Running Arduino Directly from a Solar Panel

SparkLab — Fri, 22 Aug 2025 05:12:33 +0000

Is it possible to power an Arduino project directly from a solar panel without using a battery?

I’m concerned about voltage fluctuations and whether the Arduino can handle them, or if additional components are required to make it work safely.

Looking for Reliable Sites to Buy Display Modules

TechPulse — Thu, 21 Aug 2025 05:20:33 +0000

I need a particular LCD/OLED/LED display module for my project, but I haven’t been able to find it in local shops or through common suppliers. Can anyone suggest reliable places online where I could purchase this module or find an equivalent alternative?

What's the best way to learn Arduino programming for beginners?

Anil_Tech — Thu, 07 Aug 2025 05:38:07 +0000

I’ve been diving into robotics and have managed to build a few interesting projects using Arduino. However, since I come from a non-computer science background, I often struggle with writing and understanding the code. This slows down my progress and sometimes leaves me feeling stuck.

What are the best and most effective ways to learn programming, especially for someone with a non-CS background working on Arduino projects?

How do I interface a 4–20 mA industrial sensor with an Arduino?

Electronix — Tue, 15 Jul 2025 05:47:43 +0000

I’m building a data logger using an Arduino and a few industrial sensors that output 4–20 mA current signals.

Since the Arduino reads voltage on its analog pins, I plan to use resistors to convert the 4–20 mA current into a measurable voltage (0–5V range). Before I proceed, I’d appreciate some guidance:

What resistor value is commonly used to convert 4–20 mA into a voltage safely readable by the Arduino ADC?
Can I connect multiple sensors directly to separate analog pins using individual resistors?
Do I need to worry about electrical isolation, common ground issues, or signal interference?
Are there any recommended protection or filtering techniques for accurate readings?

If anyone has a proven approach, example circuit, or tips for reading multiple 4–20 mA signals reliably with Arduino, I’d love to hear them.

I’m getting noise on my analog readings—how can I clean them up?

JannikTechy — Mon, 14 Jul 2025 05:29:35 +0000

I’m using an Arduino to read analog values from a sensor (like a potentiometer or temperature sensor), but the readings are pretty noisy and fluctuate a lot—even when the input is stable.

I’ve tried basic things like slowing down the sampling rate and averaging multiple readings, but the values still jump around. I’m not sure if it’s an issue with my wiring, the power supply, or if I need filtering components.

What are some effective ways to reduce analog noise in Arduino projects? Should I add capacitors, use shielding, or try software filtering techniques? I’d appreciate any practical tips or examples that have worked for others.

Beginner Arduino Course —Any Recommendations?

Rahav — Thu, 10 Jul 2025 06:36:10 +0000

I'm completely new to Arduino and electronics and want to start learning from scratch. There are so many options out there—online courses, tutorials—and I'm not sure which one is the best for beginners.

Can anyone recommend a good Arduino starter Course that includes essential components and maybe even comes with a beginner-friendly guide or tutorials?

Also, if there are any online courses or YouTube channels that you personally found helpful when getting started, please share them!