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Dr. Yogendra Pal @ yogi
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Dear Bharat Ketkar,Happy to know that you are interested in teaching programming to school students. I can provide complete content to you. I live in Mumbai. Please call me on 9022419053, we will discuss most of the things over the call.

you can contact me here: yogendra.pal3@gmail.com

A relay is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current. So, you need relay only if you want to operate AC devices. You can directly send the signal (current) to DC motor, you do not...

You need to write code for this logic:If it's 5 PM //read date / time from real time clock module ( http://amzn.to/2o8Hs69 ) { if water need water // read data from soil moisture sensor { water the plant for 1 min // start the motor and stop it after 1 minute } }I hope...

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