I have an arduino uno r3 that runs on 5 volts. I'm trying to build something similar to

this circuit but I'm having a hard time figuring out what type of resistors, transistors, mechanical relay, and diode to get. The whole point of this circuit is to create a small repetitive pulse. I can't conclude what type of materials to get. Can someone please help me! I really appreciate it.

 

You don't need a uno to do this. You need something simple like this and in fact for this circuit I don't think you even need the relay. The output of the '555 used direct should do the job.

 

You don't need a uno to do this. You need something simple like this and in fact for this circuit I don't think you even need the relay. The output of the '555 used direct should do the job.

Thanks but I already have an arduino board so it would be quite a waste of money.

 

If you watch the video you will see that it gives you the code to load into the Arduino. It is just a variation on the LED blink code that is used in one of the first Arduino tutorials. You will have to pause the video to copy down the code.

Les.