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The program for this project is: Because we will chop the tension from the gate of mosfet can appear a higher current, value dependent from switching time and charge of the datasheett.
Such a project is detailed below: The wiring diagram is below: Because the PWM of atmega has a switching frequency about Hz we have a switching time around 2 ms. If you like dwtasheet article click the follow button from social media to stay in touch with us!
The mount base GU 10 or GU 5. To adjust the PWM between 0 and we use a 20kohms potentiometer on analog 3 pin like in the image below:. datashret
2SK (Fuji) – N-channel Mos-fet
To protect the microcontroller we use a optocoupler which has a limit of switching current. In this case we use a halogen lamp with 16W power at 12volts.
Why we have datwsheet this value??? The atmega has the PWM option, so we will chop the tension until the intensity we want. Of course the entire project can be made with an arduino, just mount the optocoupler on the pin 9. This control is made by light and protect the atmega from eventual defect in the part of mosfet. February 26, admin 5.
12 VOLTS LAMP DIMMING WITH ATMEGA 328
That current is calculated with this formula:. To adjust the PWM between 0 and we use a 20kohms potentiometer on analog 3 pin like in the image below: If we have a p channel mosfet the situation was reversed. August 21, admin You can observe if we have a switching frequency higher the current is also higher. To chop the tension we will use a transistor.
An article about Atmega sandalone you have here. Of course you can buy it but why not to make yourself one as you like homemade and have the satisfaction that you made something by yourself. Another characteristic unlike the bipolar transistor is that the mosfet need a dahasheet on the gate bigger than 10 volts, we will use 12 from power source.
August 15, admin 2.
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Because sometimes we want to dim the lamp, we try with an Atmega and anothers components to reduce the intensity with a potentiometer. At 16W power the lamp will absorb 1. This component let us to control the mosfet without a direct contact between atmega and lamp.