Arrow Chronograph Circuit - Electronic Circuits Projects Diagrams Free

bledsoam · 24th September 2002, 03:06 PM

I am doing a project that involves detecting an arrow shot from a bow over 2 photo transistors. I was looking for ideas on monitoring the current under normal conditions, and checking for a change, when the arrow passes over it. Any help is appreciated. Thanks

pebe · 24th September 2002, 07:55 PM

I have no knowledge of archery.

To determine the requirements for a system as you suggest, could you say what the speed of the arrow is?

bledsoam · 25th September 2002, 01:33 AM

The speed of the arrow will be around 250-300 feet per second. I am using L14G2 phototransistors which I purchased from a company that makes the entire system. The actual circuitry though was not available.

pebe · 25th September 2002, 05:07 AM

Thanks. I'll put my thinking cap on!

**mechie** · 25th September 2002, 10:48 AM

I just stumbled across the following - could be a starting (sic) point?

http://members.aol.com/pinetimer/timer.htm

24th September 2002, 03:06 PM	(permalink)
bledsoam New Member	Arrow Chronograph Circuit I am doing a project that involves detecting an arrow shot from a bow over 2 photo transistors. I was looking for ideas on monitoring the current under normal conditions, and checking for a change, when the arrow passes over it. Any help is appreciated. Thanks

25th September 2002, 05:07 AM	(permalink)
pebe Experienced Member	Arrow speed Thanks. I'll put my thinking cap on!

25th September 2002, 10:48 AM	(permalink)
mechie Super Moderator	Race Timer I just stumbled across the following - could be a starting (sic) point? http://members.aol.com/pinetimer/timer.htm

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24th September 2002, 07:55 PM	(permalink)
pebe Experienced Member	I have no knowledge of archery. To determine the requirements for a system as you suggest, could you say what the speed of the arrow is?

25th September 2002, 01:33 AM	(permalink)
bledsoam New Member	The speed of the arrow will be around 250-300 feet per second. I am using L14G2 phototransistors which I purchased from a company that makes the entire system. The actual circuitry though was not available.