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The wiring diagram is below: Because sometimes we want to dim the lamp, we try with an Atmega and anothers components to reduce the datzsheet with a potentiometer. This control is made by light and protect the atmega from eventual defect in the part of mosfet.

To adjust the PWM between 0 and we use a 20kohms potentiometer on analog 3 pin like in the image below: February 26, admin 5. At 16W power the datasehet will absorb 1. You can observe if we have a switching frequency higher the current is also higher.

August 21, admin The 10k resistor and the transistor of optocoupler make a voltage divider, so when the transistor is polarized like a closed contact and mosfet is blocked lamp offwhen the transistor is blocked like a open contact the mosfet receive on gate 12 volts and it is polarized lamp on. 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.



To adjust the PWM between 0 and we use a 20kohms potentiometer on analog 3 pin like in the image below:. Currently you datashfet JavaScript disabled. That current is calculated with this formula:. If we have a p channel mosfet the situation was reversed.

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 gate.

Such a project is detailed below: We use also a radiator from a PC power source. The mount base GU 10 or GU 5. Click here for instructions on how to enable JavaScript in your browser.

In order to post comments, please make sure JavaScript and Cookies are enabled, and 2s2648 the page. The program for this project is: If you like the article click the follow button from social media to stay in touch with us!

This component let us to control the mosfet without a direct contact between atmega and lamp. Another characteristic unlike the bipolar transistor is that the mosfet need a tension on the gate bigger than 10 volts, we will use 12 from power source.

  EN 61241-1 PDF

August 15, admin 2.

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Why we have calculate this value??? Because the PWM of atmega has a switching frequency about Hz we have a switching datssheet around 2 ms. To chop the tension we will use a transistor. The atmega has the PWM option, so we will chop the tension until the intensity we want.

An article about Atmega sandalone you have here.

1PCS- FUJI 2SK (K) N-channel MOS-FET Transistor – $ | PicClick

Of course the entire project can be made with an arduino, just mount datawheet optocoupler on the pin 9. 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. That current is calculated with this formula: