Hello! long time i did not access this forum. welp, i want to make a Boost converter, so i can get a stable 5V (2Amps hopefully) from lower voltages. to use for example on a crank generator. which may generate voltages lower than 2V if not setup correctly.
i want to know if that is possible with pico. currently, i use PICO W, a D304X transistor with a heatsink attached to it. and inductor which i dont know exactly what is the inductance, but i already tested with another to see if its enough.
my idea is to control the PWM of the transistor using pico. i have no way for feedbacking for now, but my main goal is to just get a higher voltage. then in the future i may develop a feedback.
i tried connecting the inductor on the collector and input, on the emitter connected to ground. also with pico's ground and the PSU ground.
then, connecting the wire to pico and the transistor via a resistor, to control the PWM of the transistor. between the transistor and inductor i've also put a diode, then a capacitor. should work. but i only get voltages less or almost equal to the input voltages.
i tried using two diffrent voltages;
1.22VDC (from a AA battery) and 7.5VDC from a random PSU.
the circuit response to pico's changing PWM was>
the higher the value, the lower the voltage goes. (i was using raw values rather than percentages)
i tried with load or without load. sometimes, i saw 15V from my multimeter AC reading. but it did not respond to PWM changes.
also many times i get the strange behaviour of "the voltage changing when i touch the circuit".
im pretty new to eletronics. but i DO know that i have a lot of 1000UF capacitors lying around.but many of them have so small pins that cant even touch the breadboard. but if its REALLY required for at least getting a stable voltage, i will try to work around it.i've used for output during testings,
one capacitor of 22Uf.
someitmes i tried adding a load with a pretty beefy hairdryier motor on the 7.5VDC. the motor did respond slightly to PWM changes. and ran slower than connected directly.
for testing both pico and transistor, im currently running this motor on a proper 12V 2A psu, and both are working well. the heatsink i've attached is handling the work.
i want to know if that is possible with pico. currently, i use PICO W, a D304X transistor with a heatsink attached to it. and inductor which i dont know exactly what is the inductance, but i already tested with another to see if its enough.
my idea is to control the PWM of the transistor using pico. i have no way for feedbacking for now, but my main goal is to just get a higher voltage. then in the future i may develop a feedback.
i tried connecting the inductor on the collector and input, on the emitter connected to ground. also with pico's ground and the PSU ground.
then, connecting the wire to pico and the transistor via a resistor, to control the PWM of the transistor. between the transistor and inductor i've also put a diode, then a capacitor. should work. but i only get voltages less or almost equal to the input voltages.
i tried using two diffrent voltages;
1.22VDC (from a AA battery) and 7.5VDC from a random PSU.
the circuit response to pico's changing PWM was>
the higher the value, the lower the voltage goes. (i was using raw values rather than percentages)
i tried with load or without load. sometimes, i saw 15V from my multimeter AC reading. but it did not respond to PWM changes.
also many times i get the strange behaviour of "the voltage changing when i touch the circuit".
im pretty new to eletronics. but i DO know that i have a lot of 1000UF capacitors lying around.but many of them have so small pins that cant even touch the breadboard. but if its REALLY required for at least getting a stable voltage, i will try to work around it.i've used for output during testings,
one capacitor of 22Uf.
someitmes i tried adding a load with a pretty beefy hairdryier motor on the 7.5VDC. the motor did respond slightly to PWM changes. and ran slower than connected directly.
for testing both pico and transistor, im currently running this motor on a proper 12V 2A psu, and both are working well. the heatsink i've attached is handling the work.
Statistics: Posted by Doglogin — Mon Jan 20, 2025 2:39 pm — Replies 0 — Views 38