2020-02-15, 04:22 AM
I was thinking of a bridge rectifier and a voltage divider. That would give me 2 pulses per rotation. I am concerned about the voltage drop when it slows. I don't know how low before a esp would fail to detect the pulse. i could then just find the time between pulses to determine the speed. a square wave would be best. I don't have a oscilloscope so this is all guess work.
Signet claims there sensors are self powered.. I doubt i could get enough current to power a nano. i think for a esp i needs in the .08 amp range. It would be nice to have self powered sensors. The old analogue display is on the boat i think i am going to have a peek. it is -7 today and -25 tomorrow and -stupid till next week. May be if it is calm i will get brave and go to the boat.
I think i need a Radioisotope piezoelectric generator to solve my energy issues on the boat. You can get 80ish years before you have to refuel.
The other thought is the adc if the voltage is linear or reasonable so.
Signet claims there sensors are self powered.. I doubt i could get enough current to power a nano. i think for a esp i needs in the .08 amp range. It would be nice to have self powered sensors. The old analogue display is on the boat i think i am going to have a peek. it is -7 today and -25 tomorrow and -stupid till next week. May be if it is calm i will get brave and go to the boat.
I think i need a Radioisotope piezoelectric generator to solve my energy issues on the boat. You can get 80ish years before you have to refuel.
The other thought is the adc if the voltage is linear or reasonable so.