Hi RobotShop, I purchased 3 of the Practical Maker Arduino BNC Sensor Shields from you guys recently. Unfortunately I have not been able to get any of them to work. I can find no documentation for these anywhere including your website, in fact all references to these shields seems to have been removed from your site. The practicalmaker.com web site doesn’t even exist any more. I have seen some references on the internet to a model with trim pots for zero and gain, however the units you supplied me have jumpers not trim pots.
I can see the jumpers to configure which input pin to use, but cannot figure out the resistor combination jumpers. Are you able to supply me with documentation such that I can calibrate them and a sketch to use? I am trying to use them in an aquarium with the E201-C-9 PH probes available on eBay.
I have tried all three units on a UNO with the jumpers in various positions but no luck. Of particular concern is that 2 of the 3 units seem to cripple the UNO. Hopefully this is a configuration issue and the shields are not DOA.
We do apologize. The manufacturer has decided to close their doors and stop production of all products.
You can still find the documentation for the BNC shield here: robotshop.com/media/files/zi … p-0010.zip
The outputs seem to go to analog pins (you choose), so try a simple analog read program (there are example within the Arduino IDE).
The variable resistors help for fine tuning.
The videos seem to also contain additional information:
Thankyou for responding however the documentation link you provided is to nothing that has anything to do with an Arduino or calibrating these boards. I have already seen the Youtube videos and they are both about the other model with the trimpots not the ones supplied with jumpers. If you are unable to provide any documentation to support these boards then I would like my money returned?
Would you be able to read the values via the analog pins? If not, please contact us via the support center and we will look into a refund / exchange. We apologize for any inconvenience.
Of the three units I can get an analogue signal from only one of them, however still no way to calibrate it without documentation. The shield that I am getting a signal from is different to the other two in that it has a surface mount resistor between two pins of JP1 (whatever JP1 is) the others don’t. When I add an Ethernet shield (W5100) everything stops working, so it must be using other pins as well.
To summarise, I have two U/S boards and one that is completely useless without documentation. I would like to arrange for a refund please? I can find no links to the support center that you refer to in your previous post.
