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This is a simple reaction time tester. It will randomly turn on a L.E.D. and measure the time it takes you to press a button and then send the measurement to your computer.

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<p>Great code!</p><p>I've adapted your code to do something more complex. </p><p>The problem I've found is that I cannot figure out how to program it to print a message if a certain amount of time has passed and the user didn't pushed the button AFTER the game has started. </p><p>Here's my adapted code: </p><p>http://pastebin.com/kMsBkVyj</p>
<p>elseif ((millis()- beginTime)&lt; (randomSeconds + maxTimeAfterStart)){</p><p style="margin-left: 20.0px;">serial.println(&quot;message&quot;)</p><p>}</p><p>Have you tried something like this</p><p>Nice job commenting the code, I always forget </p>
<p>That seems to work, kinda!!</p><p><a href="http://pastebin.com/NADJMRjm" rel="nofollow">http://pastebin.com/NADJMRjm</a></p><p>Now the problem is the following:</p><p>When the maximum time has elapsed, it doesn't return to the same point as if there was a correct or early answer, which is wait for the next time the user presses the button. It keeps looping game after game. Any ideas?</p>
<p>if ((millis() - beginTime) &gt; (randomSeconds + maxTimer) &amp;&amp; gameStarted == true)</p><p>This works, I tested it out this time.</p>
<p>Could you send your code? Doesn't seem to work in my sketch. Where did you put that &quot;if&quot; statement?</p>
<p>if ((millis() - beginTime) &gt; (randomSeconds + maxTimer) &amp;&amp; gameStarted == true) {</p><p style="margin-left: 20.0px;"> Stop();</p><p style="margin-left: 20.0px;"> //resets game:</p><p style="margin-left: 20.0px;"> gameStarted = false;</p><p style="margin-left: 20.0px;"> timerFlag = false;</p><p style="margin-left: 20.0px;"> currentButton = LOW;</p><p style="margin-left: 20.0px;"> lastButton = LOW;</p><p style="margin-left: 20.0px;"> Blink(2);</p><p style="margin-left: 20.0px;"> Serial.println(&quot;message&quot;);</p><p> }</p>
<p>full code here http://pastebin.com/f7rtnkDL</p>
<p>Thanks so much for uploading the code. I see now. Maybe I wasn't clear (sorry, english is not my native language) but the problem is the following. </p><p>Let's look at the serial output</p><p>9090 &lt;- I pressed the button, gives 9090 (random timer initialized and waiting for reaction on led lightup)<br>1010 &lt;- I pressed the button early, so it gives code 1010 (early response). The game PAUSES infinitely until I press the button again (which is the appropriate behavior)</p><p>9090 &lt;-pressed the button again, but this time I will not press any button to test the timeout<br>Timed out &lt;-success! it timed out and didn't output the reaction time<br>message &lt;- your suggestion has been executed<br>9090 &lt;- ***HERE***, the game starts, without waiting for my response! (which is inappropriate). <br>Timed out &lt;- it will continue to loop these 3 messages up to infinity<br>message<br>9090</p><p>So, that was the problem I need to solve. </p>
<p>Do you still get that error with the code I uploaded ? </p><p>I tested out your code and got the error you are describing but the code that I uploaded fixed that for me</p>
<p>very weird. after a timeout it stays idle, and does not print &quot;9090&quot; at all?</p><p>in case i got something wrong by copy/pasteing it, i've downloaded it and ran it and it's the same. after a timeout returns to &quot;9090&quot; and keeps looping endlessly. </p>
<p>I made a few changes, I missed a few things in the last one</p><p>When you first press the button nothing should happen, then after between 2 and 5 seconds it will print out 9090 and start the timer. If the button is not pressed within 5 seconds of this it will reset the game and print Timed Out. If the button is pressed before this happens it will print out your reaction time in seconds. </p><p></p><p><a href="http://pastebin.com/BpbB4g8d">http://pastebin.com/BpbB4g8d</a></p><p>Let me know if this is what you want to happen</p>
<p>No, this is not what is intended. Let me rephrase it:</p><ol><li>wait for a button press. once this happens, a led blinks once indicating the game begins. &quot;9090&quot; is printed in the serial (is a code that sends a signal to the PC to play a sound).<li>after a random lapse, the led lights up, and a clock starts to measure the time until you press the button again. In this lapse of time, nothing is printed. <li>if you press the button after the light is turned on, it shows the reaction time in seconds (which the computer stores in a CSV file). <li>if you press before the led lights up, it blinks three times and the game ends. (&quot;1010&quot; is a code that signals the PC to play an error sound). it then should return to an idle state and return to step 1. <li>if you don't press the button after a time, the led blinks twice and the game ends. returns to step 1. (another code goes here, i haven't thought of it yet). <li>once the game ends, it only begins again if you press the button again. </ol><p>What must not happen, and is happening even with your last code, is that after a &quot;Timed out&quot;, it shouldn't return to a code 9090. It should stay idle until a button is pressed. In this last coude you moved 9090 to a place where it's not meant to be. </p><p>Thank you for your patience! This seems arbitrary but it must follow this specification because it is intended to work on animals (which is my field of research). </p>
<p>@86! While I was trying to solve this method, I got suggested to try machine state approach. I revamped completely the code and for now it works, somehow. </p><p>The only problem is to get the correct reaction time. </p><p>Check it out. </p><p>http://pastebin.com/4prEbN0W</p>
<p>That's amazing. A great work. Do you think that it could be used to screen or assess degree of substance abuse?</p>
<p>It might work, however it would require some research to be able to use the data in any meaningful way.</p>
<p>nice good work</p>
<p>Thanks</p>
<p>good beginners projet </p><p>is it possible to make it so it stop and led flickers if u press it too early</p><p>and could u make it that</p><p>i made it too but i dont have camera so i cant show it but its good </p>
<p>It is possible to do, I will upload the changes in the code soon. </p>
Cool
<p>I have attached the new code to this comment, if you press the button too soon the LED will blink, and give you a message in the serial terminal.</p><p>Sorry it took so long, I have been bust and this silpped my mind.</p>
thx good work

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