Modifing Ping)))

Dgswaner

so I would love to have multiple ping))) modules on my bots but at $30 a pop that gets a little spendy considering that I want to have 3+ on one bot and build multiple bots. So here is my thought. Take a Ping module and take off the Ultra sonic transducers and adding lines to 3+ sets of ultra sonic transducers. I would then build a circuit that would direct traffic cycling through each set of transducers. The ping module would still operate the same way it would just read a different set of transducers.

from my vast inexperience of electronics the only issue that I see would be the varying resistance through the different sets of wires to each set and perhaps inconsistency through the switching circuit. I think if I used an optoisolater the ammount of noise would be minimal, and I would think through calibration I could get consistent results. the ping is $30 and transducers are about $6.00 so if I were to add 2 additional sets I would save about $30.00 ($6*4 +$6 for the electronics). maybe it's not worth the trouble. any thoughts?

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A complex design is the sign of an inferior designer. - Jamie Hyneman, Myth Buster

Chris Savage

Hello,

Being inexperienced in electronics is certainly going to hinder such an attempt since you should also have an understanding of ultrasonics, transducers and how they work. As you modify the signal paths to the transducers you will affect many aspects of their function, not the first of which is load impedance. I would look into our 4-pack for $100 as a more cost-effective solution. If you choose to experiment you might want to try an analog switch and try this with two PING))) Modules first, so if you damage them or it doesn’t work you’re not out too much. Take care.

http://www.parallax.com/detail.asp?product_id=28015-4pack

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Chris Savage
Parallax Tech Support

Dgswaner

Thanks for the input. I have a damaged ping already that's why I thought of it. My curiosity is making me want to try it still. but I'll do as you suggested and use an analog switch first. I did see the 4 pack and that's a good price, but my wish list grows daily. so I'm always looking for a cheaper alternative.

Thanks

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A complex design is the sign of an inferior designer. - Jamie Hyneman, Myth Buster