Introduction
This guide is part of a reverse engineering project for EE 460. We were given a Cuisinart 4-Slice Tandem Toaster, and we broke it down into its most basic components.
What you need
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This Cuisinart Toaster's technical highlights include:
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Tandem, 2-slot toaster
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1½" wide toasting slots
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Function control dial
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Bagel, Defrost and Reheat selections
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Blue LED shade control with large, easy-to-read numbers
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2 or 4 slice button; cancel button
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This is the Circuit Board used for controlling each subsystem of the toaster.
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The integrated circuit marked 4541 contains an oscillator which oscillates at some hundreds or thousands of oscillations per second, the speed being determined by the browning setting. It also contains a binary counter which can count up to 65,536.
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The integrated circuit marked 4066 contains several logic gates which select the count value required for normal, defrost or reheat.
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During the count, the logic gates supply a small current to the transistor, causing it to energise the electromagnet. At the end of the selected count, the logic gates switch this current off and the transistor de-energises the electromagnet.
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While energised, the electromagnet holds the lever down. When the current is switched off the lever is released and the spring pops the toast up.
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Toasters of this age frequently use these "4000-series" integrated circuits as they can run off a wide range of supply voltages. Newer toasters use a microcontroller (essentially a simple micro computer) as this is more flexible in its functions and can also easily drive LEDs to show you what the toaster is doing.
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3 Comments
Have this broken device and would be glad to us this demonstration to fix it!
Muy detallado desmontaje felicitaciones
