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trail counter Help Answered

Ok I need some help. I am a trail steward on a local mountain bike trail. We want to make a counter so we can find out how many folks are using the trail. I thouhgt I had a good idea, but can't seem to make it work. I have access to a bunch of garge door photo sensors(neighbors a garage door tech), and a bunch of thoes pocket pedometers(got them from a manager of a Mcdonalds when they stopped giving them out). I have figured out how to make the pocket counters work as just plain counters thanks to another instructable (remove hammer, wire across with a switch or relay...). What I have not been able to figure out is how to use the garage door sensors to make the circuit work. All I need is for the circuit to make a relay close to act as the switch for the counter. I was able to do it with an LED emmiter and detector and it's circuit, but for soome reason I guess the garage door sensors have something inside their glued box that won't let it work with the circuit. Any ideas?

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LinuxH4x0r
LinuxH4x0r

12 years ago

Use the sensors to power a relay connected to a pedometer

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westfw
westfw

12 years ago

Another possibility is that the Garage door circuits use an internal "solid state relay" that only works on AC, rather than a normal mechanical relay.

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NachoMahma
NachoMahma

12 years ago

. The detector output may not be able to handle the current of the relay coil. . IIRC, garage door safety switches are wired so that they are open when not detecting the beam. This may be causing problems. . Aiming is critical. . If ambient light is interfering, try using a tube on the receiver.