Comments

Author Comment Last activity Moderation
cfastie "I have not heard of anyone using a microcontroller (Arduino or ESP board) to read data from an SD card. But maybe it is possible. A more common str..." | Read more » over 4 years ago
cfastie "I haven't tried that Feather combination. I have also never seen a list of Feather-Featherwing combinations that are incompatible. So I assume it w..." | Read more » over 4 years ago
cfastie "That's a great development. Thanks for alerting me to that. The key to this advance is knowing how to structure the KML code to define the color of..." | Read more » about 5 years ago
cfastie "You are right that there has not been much follow-through at Public Lab on developing and testing DIY conductivity or total dissolved solids (TDS) ..." | Read more » over 5 years ago
cfastie "I keep my eye out for old Nalgene bottles which are tough enough to survive rough handling and hydraulic pressure. The lids are also strong so they..." | Read more » about 6 years ago
cfastie "I was impressed by the price ($12.90) of the DFRobot TDS sensor that MadTinker is working with so I bought a couple. It was easy to get it to work ..." | Read more » about 6 years ago
cfastie "Kina, thanks for the videos. Very helpful. I might try CoolTerm again, since I was using a sketch that did not format the serial output in an appro..." | Read more » about 6 years ago
cfastie "I tried CoolTerm and never got it to work. I tried for only a half hour, so my failure is not so surprising. If you have a working data logger (e.g..." | Read more » about 6 years ago
cfastie "Liz, I don't know the specs of the 1/4" phone plug, but it needs only two contacts, the tip and one ring along the shaft. I'm not sure which types ..." | Read more » over 6 years ago
cfastie "New answer below where I could attach a file. " | Read more » over 6 years ago
cfastie "A 1/4" stereo/phone plug connects to the HCHO sensor and two wires from that cable connect to the Arduino (tip of plug to A3, ring to GND). Below (..." | Read more » over 6 years ago
cfastie "The first step might be to arrange for the co-location of the HCHO sensor, an Arduino, and somebody casually familiar with Arduino. Has the proper ..." | Read more » over 6 years ago
cfastie "Kina, Thanks for the great information. Liz, It might help to know more about this project. What is the time frame for deployment? What has been tr..." | Read more » over 6 years ago
cfastie "There is a very simple way to read the HCHO sensor with a resolution of about 10 ppb, assuming the range of the sensor is 0 to 1000ppb. (Out of the..." | Read more » over 6 years ago
cfastie "I think it is par for the course that a random proprietary sensor will not work gracefully with an Arduino. In this case, it might be that a standa..." | Read more » over 6 years ago
cfastie "Any Arduino-based data logger should be able to read the signal from that sensor and save the reading at regular intervals. The main obstacle is th..." | Read more » over 6 years ago
cfastie "I know nothing about this topic, but here is the model I concocted from whole cloth to understand it. Measuring conductivity of water with electro..." | Read more » over 6 years ago
cfastie "Well-commented code is always helpful. At the novice level at which I work, good comments are sometimes hard to come by. I have often stolen uncomm..." | Read more » over 6 years ago
cfastie "That's a really good point that the En pin on the Feather can disable the regulator and reduce power consumption. We need a table of all the featur..." | Read more » over 6 years ago
cfastie "Teams? There are going to be teams? Will they have T-shirts? I'm still not sure overlapping code is relevant. If you have a working sketch for a K..." | Read more » over 6 years ago
cfastie "Cool. We'll have to get a third answer or Gretchen won't know what to think. " | Read more » over 6 years ago
cfastie "I'm not familiar with the KnowFlow, but I would not expect there to be much overlap in the sketches which are typically used to run the two devices..." | Read more » over 6 years ago
cfastie "Although there are sensors that require more than 3.3V, most of the simple DIY sensors are designed to use 3.3V. For example, all of the sensors he..." | Read more » over 6 years ago
cfastie "Further empirical evidence suggests that the VBAT pin delivers the voltage of the battery that is plugged into the "Lithium 3.7V" connector, but no..." | Read more » over 6 years ago