Comments

Author Comment Last activity Moderation
cfastie " The simplest modification to make the sketch save to SD card once per minute is to change the line: if (logData == 1) // wr..." | Read more » over 5 years ago
cfastie "Liz, it's great to know that you (or I guess your Mom) were well coiffed in the 80s, although I regret that you did not include photographic eviden..." | Read more » over 5 years ago
cfastie "Leslie, I will lend you anything you need. Tell me about your HEPA setup. You must already have a 5V Arduino, so all you need is three DuPont wires..." | Read more » over 5 years ago
cfastie "Thanks Nick. It's good to know about the duplicate sensors. That's an intriguing engineering decision. Chris " | Read more » over 5 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 » about 6 years ago
cfastie "New answer below where I could attach a file. " | Read more » about 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 » about 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 » about 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 » about 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 » about 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 » about 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 » about 6 years ago
cfastie "Hi Adam, Those thermoelectric fans are very smart. This guy on YouTube shows how to make one with a $3.00 thermoelectric module and parts recycled..." | Read more » over 6 years ago
cfastie "I like the idea of linking to other notes that set the stage for the current one. I was using the response:##### powertag for a while, but that doe..." | Read more » over 6 years ago
cfastie "Thanks Jeff. That's a really interesting question. I did not include step by step instructions, so a complete novice would have to do some research..." | Read more » over 6 years ago
cfastie "Yes, the newer Rev. P sensor works better in high wind because it has a strong heater so the wind can't cool it off too fast. But the older Rev C s..." | Read more » almost 7 years ago
cfastie "A running mean of the aerial wind speed looks like a very reasonable result. The red line is a running mean of 10 observations (which were six seco..." | Read more » almost 7 years ago
cfastie "Here is a better answer. The first time the sketch tries to read the BMP280 sensor is immediately after the sensor has been initialized. So the sen..." | Read more » almost 7 years ago
cfastie "Way to go getting the Nano Logger logging! The first elevation data point is always wacky because the first barometric pressure data point is alway..." | Read more » almost 7 years ago
cfastie "That sounds like a wonderful "opportunity." It is also a revealing test case for the suitability of DIY environmental loggers to serve their maste..." | Read more » almost 7 years ago
cfastie "That's a really cool-looking wind sensor. The new one requires at least 8 volts, so a big battery pack is needed. It would be pretty fun to put tha..." | Read more » about 7 years ago
cfastie "Without making modifications to the components, a Nano Data Logger will last two or three days on small batteries (4 or 6 AA or AAA). I'm not sure ..." | Read more » about 7 years ago