How to make a light sensitive circuit

You need a phototransistor, 9 volt battery, battery connector, LED, resistor

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Howto & Style

Tags:

• light
• sensitive
• tutorial
• arduino
• electronics
• LED
• how
• to
• build

[wooohhhoooo9]

can you make it into a circuit not on a breadboard......and can i change the led into a dc motor?

Thanks :D

[BreadboardBasics]

@wooohhhoooo9 You can put it on a prefboard or etch your own circuit. If you want to use a motor you probably want a transistor to control it. But you can try to just replace it.

[gauravvluv]

how to calculate how much resistance is required...........

[BreadboardBasics]

@gauravvluv 100 to 500 ohm resistor would work

[rhussel0357]

can the output current of the phototransistor drive the picmicrocontroller?

[BreadboardBasics]

@rhussel0357 Yes Im not too familiar with the pic, more of and arduino kind of guy. But you should be able to connect it up to an analog input pin on the micro controller. Also one youtuber left a comment earlier and said that there is a certain chip that is able to decode the remote control signals.

[wooohhhoooo9]

@BreadboardBasics Ok, i tried making it into a circuit and it worked.I used a led and a buzzer and both works.But the motor didnt work so could you tell me more about the transistor.

[vijaysriker]

what is the colour sequence of resistor??



[BreadboardBasics]

@Mystikironman25 They are called breadboards and if you live in the US than you can find them at Radioshacks and other electronics stores.