Hello.
Ive been asked to create a 7 segment speed display game, that uses a reflective sensor to start the display and a second reflective sensor to stop the display. The person needs to run between the two sensors to give a MPH read out. Is this possible using the Arduino, if so can you give me some pointers as im new to this.
Many Thanks
I'd break the problem down - concentrate on one subsystem at a time, so get the detectors working, using Serial to print the results, then incorporate the seven segment display.
You need an output with XX.X output? 0 to 99.9 seconds? 0 to 9.9? Then push a button to show MPH (distance/time = speed) that also readies the display to start on the next beam-break?
The conversion is simple:
feet/second * 1 mile/5280 feet * 60 seconds/minute * 60 minutes/hr = miles/hour or MPH.
Example 15 feet/2 seconds * 1/5280 * 60 * 60 = 5.11 MPH
Ok, Thankyou, which Arduino board would be best for this. I have purchased the Uno Board.
Uno is fine. You only need 2 inputs, and then 3 shift registers to drive 3 common anode 7-segment displays. I'd use 3 of TPIC6C595 or TPiC6B595 then you can have larger 12V displays if you want.
Ok, Thankyou, If anyone has any circuit diagrams or programming script this would be great! as my programming skills are a little rusty.
Many Thanks
On another note, if i wanted to use RGB Dot Matrix LEDs instead of 7 Seg LEDs, is this possible with the uno. Is there anyone out there that can help me with circuit diagrams and programming script. I would really like the help, as this is for my daughters playgroup,
Many thanks again