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The single board heater system, abbreviated as SBHS (Single Board Heater System) is a lab-in-a-box setup useful for teaching and learning control systems. It consists of a heater assembly, fan, temperature sensor, ATmega16 micro-controller and associated circuitry. A stainless steel blade whose temperature has to be controlled serves as the plant. Nichrome helical coil with 20 turns kept at a small distance from the steel blade, acts as the heater element. AD590, a monolithic integrated circuit temperature transducer, is soldered beneath the steel plate. A computer fan, a low cost and commercially of the shelf component, is used to cool the plate from below.