Passive vs Active Components in PID Control: A Practical Guide

View profile for Taoufik Zennouhi

Embedded Systems Engineer | R&D Hardware & PCB design | Prototyping microcontroller solution | Cost & Reliability Optimization

⚡ Active or Passive Component: Do You Think You Know the Difference? In this 2nd post of my series on PID control in electronics, I propose to look at this distinction from a much more practical angle. We all learn that: • 🔹 A passive component consumes energy (resistor, lamp, capacitor…). • 🔹 An active component uses a power supply to amplify or generate a signal (op-amp, transistor…). Simple, right ? Well… not really. 👉 So how can a passive circuit perform the same function as an active one, even though their nature is completely different? 🤔 When we apply this difference to an electronic PID, the impact is immediate: • ⚙️ Passive → simple, cost-effective… but inevitable losses. • ⚙️ Active → amplification, better precision… but watch out for saturation! ❗ Before designing a PID, don’t forget to: 1️⃣ Study the system stability (open-loop and closed-loop) 2️⃣ Calculate the P, I, and D coefficients (tuning) 3️⃣ Then build the circuit. 🎁 In this post, I share with you a practical document that includes: • Simple & beginner-friendly guide to designing P action in electronic. • LTspice simulations to visualize the electronic parameters. • Falstad demos to test passive vs. active in real time. 💬 And you? Do you know how to reduce voltage drop in a purely passive circuit (at least for small loads) 🤔❓ 📌 Additional resources: 👉 Part 1 - Intro to PID controller : https://lnkd.in/enD9aMhq 👉 Falstad Demo (Passive Implementation) : https://lnkd.in/eGewaKQY 👉 Falstad Demo (Active Implementation) : https://lnkd.in/eJyndKS6 #Electronics #Automation #Engineering #PID #Controller #ControlSystems #EmbeddedSystems #LTspice #Falstad

Igor Muralhes

Hardware Engineer | Industrial Electronics Expert | LATAM Technical Support | Project Management Professional

3w

Excellent content! Thanks for bringing us with it, PID is the heart of the Industrial Automation.

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