Modifiche al passo #11
Modifica in base a Philip Le Riche-
Modifica approvata da Philip Le Riche
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| [* black] This is the Circuit Board used for controlling each subsystem of the toaster. [* red] 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. [* orange] The integrated circuit marked 4066 contains several logic gates which select the count value required for normal, defrost or reheat. [* yellow] 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. [* green] 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. [* black] 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. |
| [* black] This is the Circuit Board used for controlling each subsystem of the toaster. [* red] 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. [* orange] The integrated circuit marked 4066 contains several logic gates which select the count value required for normal, defrost or reheat. [* yellow] 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. [* green] 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. [* black] 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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