Lord_grezington
- May 3, 2013
- 124
- Joined
- May 3, 2013
- Messages
- 124
Evening all
I have a problem where I need to get a potential difference between 0-1.6Vdc to source an input to a drive chip.
My source voltage is 3.3V.
I want to use a trim pot as a potential divider to produce the 0-1.6V. (a user interface)
I want to, for a short period of time use a digital signal (3.3V) to change the voltage from whatever the existing voltage is from the trim pot to jump to 1.6V. (the trip pot can be anywhere between 0 and 1.6V)
Is there a simple low cost way to do this?
The only way I have thought of doing it is by using a input on a PIC for the trim pot, then outputting a pwm via a buck converter to create the analogue voltage. This way I can change the voltage through the PIC for the increase that I need for when I need it. This though needs an analogue input to the PIC, and a PWM output.
I would like to (if its possible) use the Pot as a direct 0.1-6V directly to the chip, and only use a digital IO to increase the voltage to 1.6V.
I have looked at using a Zener Diode, but these are only limited to 1.7V which is too high and can destroy the drive chip.
Is this possible to do without using 2 IO from the chip?
I have a problem where I need to get a potential difference between 0-1.6Vdc to source an input to a drive chip.
My source voltage is 3.3V.
I want to use a trim pot as a potential divider to produce the 0-1.6V. (a user interface)
I want to, for a short period of time use a digital signal (3.3V) to change the voltage from whatever the existing voltage is from the trim pot to jump to 1.6V. (the trip pot can be anywhere between 0 and 1.6V)
Is there a simple low cost way to do this?
The only way I have thought of doing it is by using a input on a PIC for the trim pot, then outputting a pwm via a buck converter to create the analogue voltage. This way I can change the voltage through the PIC for the increase that I need for when I need it. This though needs an analogue input to the PIC, and a PWM output.
I would like to (if its possible) use the Pot as a direct 0.1-6V directly to the chip, and only use a digital IO to increase the voltage to 1.6V.
I have looked at using a Zener Diode, but these are only limited to 1.7V which is too high and can destroy the drive chip.
Is this possible to do without using 2 IO from the chip?