Easily control circuit resistance

The Decade Resistance Box is an array of precision variable resistors used to control resistance in DC circuits for physics and electronics experiments. With four smooth-turning decade dials, resistance can be set from 1 Ω to 9999 Ω in 1 Ω increments, making it easy to fine-tune experiments and collect reliable quantitative data. Built with 1% tolerance resistors, 4 mm safety sockets, and classroom-ready durability, this resistance box transforms abstract circuit theory into hands-on discovery.

Why Teachers Love the Decade Resistance Box

• Precise, Repeatable Control – Four decade dials allow students to quickly select exact resistance values in 1 Ω steps, without swapping individual resistors.

• Supports Core Electricity Labs – Perfect for verifying Ohm’s Law, investigating RC time constants, building potential dividers, and designing op-amp filter circuits.

• Built for Real Classrooms – 1% tolerance resistors ensure accurate results, while standard 4 mm sockets integrate seamlessly into student circuit setups.