Search found 5 matches

by MendipMac
Fri Aug 28, 2020 2:41 pm
Forum: Sensors
Topic: Power supply for Wind sensor Rev P
Replies: 2
Views: 408

Re: Power supply for Wind sensor Rev P

Hi Paul, yes I was intending to sample intermittently, using a RTC clock to0 wake up the Arduino every hour, run sensor for 30 secs / 1 minute, sample and then shut-down. I have done this for my CO2 logger using a 3.7v 2000mAh Li battery which lasted for over a month in the cave. Sorry Paul but what...
by MendipMac
Fri Aug 28, 2020 8:46 am
Forum: Sensors
Topic: Power supply for Wind sensor Rev P
Replies: 2
Views: 408

Power supply for Wind sensor Rev P

Hi Paul, I have ordered another Wind sensor Rev P from Jeelabs. I would appreciate your advice on why I should not use a step up voltage to power the wind sensor? I am trying to develop a logger to leave in a cave for a week or so to monitor the draught (wind) from various locations, the speed and d...
by MendipMac
Thu Aug 27, 2020 2:51 pm
Forum: Sensors
Topic: Wind sensor Rev P Temperature ambient or working?
Replies: 4
Views: 829

Re: Wind sensor Rev P Temperature ambient or working?

Hi Paul I did as suggested and wired the 9v battery direct to the the wind sensor, no change I am afraid - the voltage between ground and Temp pin was 0.88v (~28deg C). If the boost circuit was dragging down the 3.3V wouldn't the output (wind) values also be an issue? I was using a 9V battery as I w...
by MendipMac
Wed Aug 26, 2020 3:26 pm
Forum: Sensors
Topic: Wind sensor Rev P Temperature ambient or working?
Replies: 4
Views: 829

Re: Wind sensor Rev P Temperature ambient or working?

Hi Paul thanks for the reply, yes I was aware of the formula thanks. I checked the voltage between temp pin and ground and it compares very favourable with the calculated value see below:- RT 303 voltsout 0.98 29.56 C I checked between ground and temp pin and got 0.98V T 487 voltsout 1.57 59.97 C (h...
by MendipMac
Tue Aug 25, 2020 2:30 pm
Forum: Sensors
Topic: Wind sensor Rev P Temperature ambient or working?
Replies: 4
Views: 829

Wind sensor Rev P Temperature ambient or working?

Hi, I have been experimenting with the Wind sensor Rev P for sometime now. I noticed that the temperature output (Pin Temp) from the sensor appears to always read higher than ambient, it calculates out at 33.69 deg C (AD (3.3V) for A2 = 328). I have installed a BME280 and the corresponding ambient t...