Large Light Dependent Resistor (LDR) – CdS Cell | Jaycar RD3485

Your light-sensing circuit keeps drifting because the LDR you grabbed off a marketplace has no published rise or decay time. This Jaycar CdS cell gives you numbers you can design around: 50 ms rise, 40 ms decay, and a dark-resistance floor of 0.5 MΩ. Solder it in, calibrate once, and your sensor stops guessing. Add it to your cart and get back to building

• Cadmium sulphide (CdS) photosensitive cell – the standard for hobby and prototyping light sensors
• Dark resistance 0.5 MΩ min; light resistance 2.8 KΩ min to 8.4 KΩ max
• Rise time 50 ms (0–63%), decay time 40 ms (100–37%) – fast enough for real-time dimming or alarm circuits
• Max dissipation 100 mW; lead spacing 7.68 mm for standard PCB footprints
• Body size 8.5 × 10.14 mm – fits the same socket as most small-signal LDRs