52613 sfw356645eh5ah6j75
Member
hi, i'm progressing in my fan and peltrier controler for my pc, and have an already working circuit, but the problem is that it sucks 6W just tu keep the this off. (big 10W resistor....)
**broken link removed**
this is the old circuit that i have builded in a breadboard. and works great so great that the flyback diode blew when i pluged in a toy car motor to test if the heatsink could stand the heat......
(those brush motor must have a very high inverse current)
the problem is that those resistor are AAA-batery size, and get very hot, and if i want to fit this in a 5 1/2 bay then i have to keep everything as small and cool as posible.
the new circuit is this. using some npn and pnp driven with a smal 1/4 watt resistor.
**broken link removed**
the 2N6038 will be a TIP102.
is there anything better? the idea is to have a response around 1 or 1/2 µs.
PS: the pwm signal works at 25KHz, and i don't have an oscilosope yet u.u
**broken link removed**
this is the old circuit that i have builded in a breadboard. and works great so great that the flyback diode blew when i pluged in a toy car motor to test if the heatsink could stand the heat......
(those brush motor must have a very high inverse current)
the problem is that those resistor are AAA-batery size, and get very hot, and if i want to fit this in a 5 1/2 bay then i have to keep everything as small and cool as posible.
the new circuit is this. using some npn and pnp driven with a smal 1/4 watt resistor.
**broken link removed**
the 2N6038 will be a TIP102.
is there anything better? the idea is to have a response around 1 or 1/2 µs.
PS: the pwm signal works at 25KHz, and i don't have an oscilosope yet u.u
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