| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| 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 have not used graphing for live debugging because I didn't know how easy it was to do. I use the live serial monitor in the Arduino IDE all the t..." | Read more » | almost 7 years ago | |||
| cfastie | "Yes, I agree that this is a different approach to an issue that has had a lot of effort directed at software solutions. This is a purely hardware s..." | Read more » | almost 7 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 » | almost 7 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 » | about 7 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 » | about 7 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 » | about 7 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 » | about 7 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 » | about 7 years ago | |||
| cfastie | "Evidence suggests my answer is wrong. I powered a Riffle with a battery pack which supplied 4.5V, but the VBAT pin supplied only 2.3V. So maybe it'..." | Read more » | about 7 years ago | |||
| cfastie | "Hi Shanlter, That's a good question. There is no 5V-out pin on the Riffle, but there is a "VBAT" pin on the 2x7 pin header. I assume that pin carr..." | Read more » | about 7 years ago | |||
| cfastie | "The Melexis MLX90614 Non-Contact Sensor has a temperature range of -70°C to +380°C. This is an infrared sensor so it does not have to touch the thi..." | Read more » | over 7 years ago | |||
| cfastie | "Leslie, it's really good you got this working. Thanks for troubleshooting the RTC library. It looks like the library I have been using is the MrAlv..." | Read more » | over 7 years ago | |||
| cfastie | "It would be fun to try an Aeropod. I couldn't find any details about the instruments, but it looks like an awesome contraption to fly. " | Read more » | over 7 years ago | |||
| cfastie | "A pitot tube measures air pressure and uses fancy math to relate that to wind speed. I assume the ones on airplanes work better than the Rev P. " | Read more » | over 7 years ago | |||
| cfastie | "I decided not to drop into the rabbit hole of applying time series analysis to these data. There does appear to be some periodicity present, but I ..." | Read more » | over 7 years ago | |||
| cfastie | "I have a hypothesis about the different results obtained with two BME280 sensors on the flying rig. A difference of 3° to 4°C is more than should b..." | Read more » | over 7 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 » | over 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 » | over 7 years ago | |||
| cfastie | "The Mini Pearl Logger in the compost pile stopped logging today when the battery voltage dropped too low. Four AAA eneloops ran the logger for 13.5..." | Read more » | over 7 years ago |