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46  Using Arduino / General Electronics / Re: Solid State Relay Testing on: October 04, 2012, 08:56:00 am
Replace the USB hub with some other load like 25Watt bulb and check.
47  Community / Bar Sport / Re: do you use android? on: September 25, 2012, 04:55:30 am
Thanks for Sharing.  Nice app!
48  Using Arduino / Sensors / Re: recommedation for ultrasonic water level sensor? on: September 24, 2012, 10:19:25 am
Another method you can think of measuring the water level is capacitive sensor method.  Capacitance will increase proportional to the water level.  You can use capsense library from arduino play ground for the same.
49  Using Arduino / General Electronics / Re: pulling my hair out!!! uln2803apg on: September 24, 2012, 02:20:11 am
You are welcome :-)
50  Using Arduino / General Electronics / Re: pulling my hair out!!! uln2803apg on: September 24, 2012, 01:43:51 am
You need to connect PIN10 to VCC.
51  Using Arduino / Sensors / Re: motion detector that works behind clear glass window? on: September 21, 2012, 03:49:11 am
I used a PIR sensor module for the motion detection for a security light and fixed everything in a small transparent plastic box (PIR sensor module also inside the box).  It is working fine without any issues.  Whenever there is a motion it switches on the light.  So I believe it works for your case as well with out any issues from behind the clear glass. Just give a try!!
52  Using Arduino / General Electronics / Re: Relay module, 5 V, where to connect? on: September 19, 2012, 02:39:27 am
You are welcome :-)
53  Using Arduino / General Electronics / Re: Relay module, 5 V, where to connect? on: September 19, 2012, 02:30:07 am
Yes, you are right.  S is where you will connect your digital output.  Also you can refer link for more knowledge on relays http://arduino.cc/playground/Main/InterfacingWithHardware#Output
54  Using Arduino / General Electronics / Re: Relay module, 5 V, where to connect? on: September 19, 2012, 02:17:53 am
You can use any of the digital outputs, use/define the same pin in the sketch to operate the relay.  Good Luck!!!
55  Using Arduino / General Electronics / Re: How to calculate heatsink requirements on: September 19, 2012, 01:50:36 am
Thank you dc42 and Mike for your detailed explanation.  It's a great learning.  I have chosen a 75°C @ 15W (natural convection) heat sink for my application. I believe its bigger than what is needed, but I feel its no harm.
56  Using Arduino / Sensors / Re: recommedation for ultrasonic water level sensor? on: September 19, 2012, 12:15:09 am
If you want to use only Ultrasonic, you can give a try replacing the existing sensors with water proof sensors.  Have a look at this link http://www.alibaba.com/product-gs/575210695/40KHz_waterproof_ultrasonic_transducer.html?s=p
57  Using Arduino / General Electronics / Re: What is this sensor? (Picture attached) on: September 18, 2012, 11:42:40 pm
Thank you all for your responses and suggestions!!!  I will replace the reed switch with a new one and check.
58  Using Arduino / General Electronics / Re: What is this sensor? (Picture attached) on: September 18, 2012, 12:07:45 pm
Thanks for your input  smiley.  I have tested it with multimeter and confirm its a reed switch.  If the magnet is near to it, I can see the continuity in the multimeter.  Now the question is, are there any chances that it may go defective or malfunction at higher speeds?   
59  Using Arduino / General Electronics / Re: What is this sensor? (Picture attached) on: September 18, 2012, 11:19:22 am
Yes, Its a treadmill and sensor has only two wires.  Is it a reed switch?
60  Using Arduino / General Electronics / What is this sensor? (Picture attached) on: September 18, 2012, 09:27:39 am
This sensor is fixed to the frame just next to the pulley and pulley has a small round magnet fixed to it.  Is it some kind of hall effect sensor? And what are the chances that it may go bad?  It controls the speed of the motor and the problem I am facing is the speed fluctuation.  Not sure if this sensor is the contributor to the problem or something else.  Any help is greatly appreciated and thanks in advance.
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