Photoresistor Course
Master photoresistor circuits from fundamentals to precise light thresholds. Design and simulate LDR dividers, transistor switches, and comparator stages that reliably drive LEDs and buzzers in real electronics and sensor applications.

flexible workload from 4 to 360h
valid certificate in your country
What will I learn?
The Photoresistor Course gives you practical skills to design and validate reliable LDR circuits fast. You will learn LDR fundamentals, voltage divider design, transistor switching, and precise comparator thresholds, then verify behavior with Falstad or LTspice and real measurements. Step-by-step examples, safety tips, and troubleshooting guides help you build stable light‑controlled LED and buzzer applications with confidence.
Elevify advantages
Develop skills
- LDR circuit design: build precise light-triggered switches in minutes.
- Voltage divider tuning: set clean dark/bright thresholds with real-world values.
- Transistor driving: size base and load parts to switch LEDs and buzzers safely.
- Comparator control: design crisp window comparators with hysteresis for LDRs.
- Simulation and measurement: validate LDR circuits with Falstad, LTspice, and lab tools.
Suggested summary
Before starting, you can change the chapters and workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
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