Hi friends ! Working now with power management circuit for my generator (until waiting plastic holders for perfect coil-magnets positioning). I will use Texas Instrument bq25504 chip, low power atmega328P (or MSP430G2) and RF module. Now trying understant all bq25504 working principles. Want to ask - solar cell MPP point is about 80% open circuit voltage. Here i'm using electromagnetic generator, and can't find anything about maximum power point.. Piezo and TEG have IV like this :
So maximum power is at 50% Voc voltage. Maybe electromagnetic generator have the same characteristic? Of course, when i will make whole generator, then i will measure that curve by myself, but now i only want to know what is expected result. Thanks !
So maximum power is at 50% Voc voltage. Maybe electromagnetic generator have the same characteristic? Of course, when i will make whole generator, then i will measure that curve by myself, but now i only want to know what is expected result. Thanks !
Make a crystal cell to manage the circuit. They're cheap and you can make it any size, and with a small processing unit the crystal cell would last longer than the average human lifespan... or two... or three
[Mod Edit .... This is really bad info]
[Mod Edit .... This is really bad info]
Last edited by a moderator:
Interesting... I saw one of these...Make a crystal cell to manage the circuit. They're cheap and you can make it any size, and with a small processing unit the crystal cell would last longer than the average human lifespan... or two... or three
I don't believe it, but I still like seeing how creative trolls are becoming.
Can you post link about that crystal cells?Make a crystal cell to manage the circuit. They're cheap and you can make it any size, and with a small processing unit the crystal cell would last longer than the average human lifespan... or two... or three
It's not worth looking up. Copper tube, some powder contents being melted over a hotplate inside the copper tube and a screw... Supposed to provide electricity for years.
You are welcome to look, but I smell a troll. It smells like anti-physics baking powder.
Need additional thought friends ! What is the best way to detect correct rotation of magnets ? I had idea to use reel switches, but i think i will be disappointed with that, because magnetic field is strong enough, and do position like this is almost impossible:
I do not have reels switches yet. But i think contacts will short about 1cm all around the magnets without any gap...
Another solution - hall effect sensor like this one http://www.ti.com/lit/wp/slyy058/slyy058.pdf . But it is active element, that consumes current...more than mcu...And here need 2 hall sensors as well... Or not ? Any ideas please !
I do not have reels switches yet. But i think contacts will short about 1cm all around the magnets without any gap...
Another solution - hall effect sensor like this one http://www.ti.com/lit/wp/slyy058/slyy058.pdf . But it is active element, that consumes current...more than mcu...And here need 2 hall sensors as well... Or not ? Any ideas please !
Can you elaborate on the 'correct' rotation you are trying to detect?Need additional thought friends ! What is the best way to detect correct rotation of magnets ? I had idea to use reel switches, but i think i will be disappointed with that, because magnetic field is strong enough, and do position like this is almost impossible:
I do not have reels switches yet. But i think contacts will short about 1cm all around the magnets without any gap...
Another solution - hall effect sensor like this one http://www.ti.com/lit/wp/slyy058/slyy058.pdf . But it is active element, that consumes current...more than mcu...And here need 2 hall sensors as well... Or not ? Any ideas please !
Are you after position or speed?
Reed switch, but only if there is enough of a magnetic gap between the magnets to let it turn off. How about a mechanical solution that only allows it to turn one way?
Similar to the rear sprocket on a bicycle?
Here i'm again ! So, little news from me. Have reed switches, and there are gap beween magnetic fields, so i think reed switches here will work as i want. Another new - made holder for coils.
Now positioning is perfect. 5 coils with 400 turns (without cores) . It generates about 700-800mV @1 rotation per second. Now making pcb with two options - with diode bridge, and with voltage multiplier. Will see how i will manage it...
So, little news from me. Have reed switches, and there are gap beween magnetic fields, so i think reed switches here will work as i want. Another new - made holder for coils.
Now positioning is perfect. 5 coils with 400 turns (without cores) . It generates about 700-800mV @1 rotation per second. Now making pcb with two options - with diode bridge, and with voltage multiplier. Will see how i will manage it...
