Arduino Controlled Personal Fan with Ping Sensor / ATtiny2313

                                                      What does this do?

This is a fan that will automatically come on when i sit at my workbench and off when i leave.
It uses an Ultrasonic Distance Sensor, or commonly called a  "Ping " sensor for detection.
An ATtiny2313 to handle the processing.
A power supply from a router. ( Wall wort )
A relay to switch the AC power.

The ping sensor works by sending out radio waves and times how long it takes for the radio waves to bounce off of an object then return. From this time we can calculate distance. I know it is more complicated than this but this is the simplified version 

Video Link

Step 1: BOM

• ATtiny2313
• 6v relay
• 20 pin socket
•  Ping sensor
• Fan
• 2n2222 transistor
• 1N4004 Diode (2)
• 10K resistor
• 330R Resistor
• 8.2v power supply
• Perf board
• Switch

Wire Glue

Comments

[sath02]

Nicely done!
Well suit for the tropical climate!

[WWC]

Thanks

[pfred2]

Following the advise of my spiritual guide Saint Ozzy I'd have used an electric eye.

http://www.youtube.com/watch?v=tsLkL8DTHeg

[iceng]

You do good work !
And that is a heavily well worked bench.

A

[WWC]

Thanks A

i was trying to prevent myself from getting tennis elbow from turning the fan switch on and off, You know how dangerous that can be.

[iceng]

Extremely elbow hazardous !
And very humid by the iron oxide on the fan lamination :-P
Especially since I see you are using a 220VAC style of power connector.

[rimar2000]

Clever idea! Nice work.

[WWC]

Hi
Thank You for looking at one my Instructable and it is a honor to have you comment also.
I follow you work as well.

Thank You