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Old 03-19-2003, 11:31 PM   #1
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Default Personal Lap Timer (built in M8)

Hello..

I have this idea, any inputs will be appreciated...

reason of making this is because the button in M8 is ridiculous... who can press the button while steering the car???
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Old 03-20-2003, 04:19 AM   #2
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I like your idea. There are some ready 433MHz radiolinks, but some of them don't work properly if the bitstream is not fast enough and doesn't contain enough transitions. In other words sending '0' for seconds and then a couple of '1's might not work without some encrypting. I'm interested to hear how this idea evolves.
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Old 03-20-2003, 08:13 AM   #3
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It's good to hear that Jesse T, I am trying to gather more info for the IR portion... I am not sure if the IR RX will detect the Tx that will move as it's mounted on the car...
For the FM 433Mhz Transceiver, I am not so worry yet... it doesn't need to be superfast response as it is only used to "repeat" the IR sensing and then pulse the relay to activate the timer switch on the Radio Tx.( of course we have to open up the radio and solder a wire parallel with the existing switch).

I thought it would be wonderful if we can work together regarding this idea...I am sure you have more knowledge in electronics... furthermore... in US, access to parts is much more easier ans available... but I'll try to do as much as I can over here...

thanks for the feedback..
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Old 03-20-2003, 05:52 PM   #4
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This is an interesting thread, if it is feasible it would enable almost all transmitters that have lap counting built in to be used.

Sorry I cant contibute to the cause (I am a noob when dealing with electronics) but I can offer encouragement
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Old 04-03-2003, 09:17 AM   #5
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Latest update:

1. I tested the encoder and decoder chip.. they work perfectly and you can set their own ID by address setting... so the decoder will only decode data that is transmitted by the encoder with a similar address or else it will be ignored.

2. Now, waiting for my RF TX and RX module to send the data to the Rx that is mounted on my M8 to activate the "timer" button via relay...

Any inputs to this thread is appreciated...
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Old 04-16-2003, 07:40 AM   #6
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Latest updates:

1. Rf module arrived.
2. interfaced with IR encoder & decoder.
3. Modified the M8 "timer" button and installed a jack.
3. Lab test results is good and encouraging.
4. Prior to "on track testing".
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Old 04-16-2003, 08:09 AM   #7
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The good news if this works is.... it can be used with any radio that has a built in lap timer...
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Old 04-16-2003, 12:22 PM   #8
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Keep us posted!
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Old 04-16-2003, 02:03 PM   #9
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This is great.
What would the estimated cost be?
And how much work is actually involved?
Can a non-electronics major do it themselves?
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Old 04-17-2003, 01:31 AM   #10
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The total cost has not been calculated yet.. I'll only calculate the cost after testing it in a real track conditions....
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Old 04-17-2003, 01:42 AM   #11
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This whole thing could be simplyfied by just purchasing a hand-held lap-timer clock and hacking to its button instead of the button in the M8. One radiolink could be avoided that way. If you could tell me which coder & encoder you have used, I'd be happy.
BR/ JesseT
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Old 04-17-2003, 04:25 AM   #12
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yes... that's true... if you have a stopwatch that can memorize many laps (commonly 99 laps) I think from Robic.

Anybody can get me a Robic with reasonable cost?? Maybe I can use it for testing too...
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Old 05-10-2003, 06:53 AM   #13
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any more news on this?
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Old 05-10-2003, 10:15 AM   #14
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the track testing results is not satisfying... so, I need to do modifications on the receiver (sensor) side.
Due to busy schedule..racing and work.... the update will be delayed a bit... I'll keep posting whenever there is progress...

Wish me luck!..
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Old 05-10-2003, 01:27 PM   #15
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Now this is what I like to read about, keep up the interesting work and good luck.
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