Simple Circuits

Smart Security System | Arduino UNO | IR + Servo + LCD + Keypad 🔐 Smart Security System Arduino UNO · IR Sensors · Servo · LCD · Keypad · Buzzer 🔎 What is This Project? This is a Password-Protected Car Parking System built with Arduino UNO. It manages parking slots, controls a servo barrier, and uses IR sensors to detect cars entering and exiting. Features: 🔐 4×4 Keypad – for password authentication (Entry) 📡 2× IR Sensors – Entry (IR1) and Exit (IR2) detection 🔄 SG90 Servo Motor – automatic barrier control 📟 16×2 LCD with I²C – displays slot availability and status 🔊 Active Buzzer (MH-FMD) – audio feedback (active-LOW) ⚙️ How It Works • The system continuously monitors IR sensors for car entry and exit. • When a...

Introduction to Injection Molding 2026 | Simple Circuits ↑ Simple Circuits In collab with JUSTWAY.com Injection Molding · Plastics · Mass Production · JUSTWAY Introduction to Injection Molding The Complete Guide From plastic pellets to millions of identical parts — everything engineers, product designers, and entrepreneurs need to know about injection molding, materials, design rules, and how JUSTWAY makes it accessible online in 2026. Nitin Sharma Simple Circuits June 2026 15 min read Scroll Brought to you by  JUSTWAY.com Online injection molding service — plastic parts from $1, lead times from 15 days. Nearly every plastic object you touch today was made the same way: molten plastic injected under pressure into a precision-machined mold, cooled, and ejected as a finished part. Injection...