As an electronics hobbyist or engineer, you may have faced the issue of low voltage with your ESP32 boards, causing instability or unexpected resets. The ESP32 is a powerful microcontroller used in many projects, but it requires a stable 3.3V to 5V power supply for optimal performance. If the voltage drops below this range, your board may malfunction.

The Problem :

A common scenario occurs when you’re powering the ESP32 through a USB or external battery, and the voltage drops due to a weak power source. This can cause the ESP32 to reset or fail to boot entirely. It’s like trying to run a device on low battery—it just won’t work properly.

The Solution :

To fix this, use a voltage regulator to ensure your ESP32 always receives a stable voltage. For example, a 5V USB charger can supply inconsistent voltage, so using a 5V to 3.3V regulator is a simple solution. This keeps the voltage stable even when power sources fluctuate.

Sample Calculation : 

Suppose you’re using a 5V source to power your ESP32.

You need to drop it to a steady 3.3V. If your ESP32 draws 100mA, the power consumed can be calculated by:

P=V×I=3.3V×0.1A=0.33W

Make sure your voltage regulator can handle the required power without overheating.

Component Suggestion :

For your projects, check out Voltage Regulators and MOSFETs, both of which are excellent for stabilizing power. Shop now at SmartXProKits.in and support India’s innovation by choosing Made in India components for your prototyping needs.

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