⚠️ The Problem :

Smart security cameras, especially DIY or IoT variants, often require a clean and stable low-voltage power supply (typically 5V or 3.3V). Using unregulated supplies or long cables can cause voltage drops, leading to reboots, frame drops, or even camera failure.

🛠️ The Solution :

Use a low-dropout (LDO) regulator or a buck converter with high efficiency and low ripple output. It ensures the camera receives constant voltage, even under varying loads or long wire runs. Add bulk capacitors near the camera to filter out any residual noise.

🧪 Practical Example :

A maker in Bengaluru built a Wi-Fi surveillance cam with an ESP32-CAM module. Initially powered via USB cable, the module kept resetting when LEDs turned on. Switching to a 5V buck converter with a 470µF capacitor near the camera fixed the issue completely.

🧮 Sample Calculation :

Let’s assume:

• Camera draws 300 mA

• Cable resistance = 0.5Ω (round trip)

Voltage drop = V=I×R=0.3×0.5=0.15VV

= I \times R = 0.3 \times 0.5 = 0.15VV=I×R=0.3×0.5=0.15V

A 5V supply becomes 4.85V — close to dropout.

Use a buck converter with wide input range and good regulation to compensate.

🛒 Product Suggestion – Made in India

• Try a buck converter module ➜
  
  

• Or a low dropout voltage regulator ➜
  
  

👉 Shop now at SmartXProKits.in
🇮🇳 Support our work and India’s innovation—buy from our Make in India site!