Hi,
I have just build a PWM circuit based on 555 timer.
I have the output of the 555 connected through a 1k resistor to the base of a TIP122 transistor, which drives a motor.
But I noticed the transistor itself drops about 1.6 of a volt regardless.
So from a 12v supply, through the PWM cct I get a Max of I get 10.4v.
Is possible to get output closer to 12v than 10.4v through means of a different transistor or is this just something that has to be taken into account when building, like the voltage drop across a diode?
Thanks for your help,
Regards NM
I have just build a PWM circuit based on 555 timer.
I have the output of the 555 connected through a 1k resistor to the base of a TIP122 transistor, which drives a motor.
But I noticed the transistor itself drops about 1.6 of a volt regardless.
So from a 12v supply, through the PWM cct I get a Max of I get 10.4v.
Is possible to get output closer to 12v than 10.4v through means of a different transistor or is this just something that has to be taken into account when building, like the voltage drop across a diode?
Thanks for your help,
Regards NM