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Tutorials & research

Long-form write-ups with images. Someone figured out how to drive a 7-segment display or debug their PWM output — read it, build it, remix it.

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From the community

5

Your first circuit: blink an LED

A 9V battery, a resistor, and an LED. Why the resistor matters, how to read current, and how to fix it when the LED goes dark.

Voltage dividers: how two resistors split a signal

Two resistors in a row, a tap in the middle, and suddenly you can shrink any voltage down to the one your circuit actually needs. The one formula to memorize.

Your first ESP32 build: a servo that sweeps

Five parts and twenty lines of code. How the ESP32 talks to a hobby servo, why the status LED lives on GPIO23, and how to verify every wire in the sim before you touch hardware.

This is trial of tutorial

I think i needed to change some llittle thing because i dont this is build as i wanted lets see after this post

RC circuits: capacitors remember

A resistor and a capacitor. Close the switch and the capacitor charges — but not instantly. The curve is exactly what the oscilloscope shows.