Hi all
Im new to electronics and have 3 questions
1 mosfet n type transistors oscillate without any additional resistors caps or inductors if a centre tap coil is conneted to 5vdc + drain to one end and source to the other gate to negitive of power supply why?
2 this same circuit works perfecly om p9 battery and my home made pc power supply with vairable voltage controler from 1.5 to 11.5 volt (mosfer switches on after 2.7volts) but connect it to my pc (all in one Lenovo) makes the secondary coil's led flash a few times and then mosfet stops operating completely why?
3 what would be the best way of transfering power wirelessly from usb to phone Using a secondary coil that will fit between the battery and the cover even if i have to modify the cover to do so i also would like to turn off the circuit by lifting the phone ( possibly by means of a proximity sensor) and incorparate a charging system internaly for the circuit so that it acts as a wireless powerbank as well?
Im new to electronics and have 3 questions
1 mosfet n type transistors oscillate without any additional resistors caps or inductors if a centre tap coil is conneted to 5vdc + drain to one end and source to the other gate to negitive of power supply why?
2 this same circuit works perfecly om p9 battery and my home made pc power supply with vairable voltage controler from 1.5 to 11.5 volt (mosfer switches on after 2.7volts) but connect it to my pc (all in one Lenovo) makes the secondary coil's led flash a few times and then mosfet stops operating completely why?
3 what would be the best way of transfering power wirelessly from usb to phone Using a secondary coil that will fit between the battery and the cover even if i have to modify the cover to do so i also would like to turn off the circuit by lifting the phone ( possibly by means of a proximity sensor) and incorparate a charging system internaly for the circuit so that it acts as a wireless powerbank as well?