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Circuitkar Blog

Tutorials, project guides and component deep-dives.

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smart-parkingiot

Smart Parking System Components

Complete component breakdown for a smart parking system — sensors per slot, central controller, display, and software architecture.

23 May 2026
1 min read5
home-automationstarter-kit

Home Automation Starter Kit Guide

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Exactly what to buy to start building smart home controls — components, total cost, first build steps, and firmware choices.

22 May 2026
1 min read6
makercomponents

Electronics Components Every Maker Should Own

The essential components, tools, and modules every maker needs stocked — with specific quantities and why each item earns its place.

21 May 2026
2 min read5
pirmotion-sensor

PIR Motion Sensors Guide

How PIR sensors work, HC-SR501 vs HC-SR505 vs AM312, wiring, sensitivity adjustment, and false trigger causes and fixes.

18 May 2026
1 min read10
roboticsmotor-driver

How to Select Components for Robotics Projects

Chassis, motors, motor drivers, sensors, controllers, and batteries — the complete component selection guide for beginner to intermediate robotics.

17 May 2026
1 min read4
nodemcuesp32

NodeMCU vs ESP32 for Home Automation

For home automation specifically — relay count, Bluetooth presence detection, ESPHome/Tasmota support, and which board to buy for each scenario.

16 May 2026
1 min read5
esp32power-supply

ESP32 Power Supply Best Practices

Why your ESP32 project keeps resetting, and how to power it correctly — from USB to LiPo battery to mains-derived 3.3V.

14 May 2026
2 min read51
final-year-projectiot

Best Final Year IoT Project Ideas

Ten final year IoT project ideas that actually impress panels — with components, innovation angles, and what makes each one stand out.

13 May 2026
2 min read10
soil-moisturesmart-irrigation

Soil Moisture Sensors Guide

Capacitive vs resistive soil moisture sensors — which lasts longer, how to calibrate, and how to build a smart irrigation trigger.

12 May 2026
2 min read8