Hi,
I am designing multiple channel programable constant current source for LED light source of Camera.
From previous help from here,
Possible method is using V to I , a shift register CD4094 output connect to R2R (DAC) generate a V, input to opamp (buffer), and output to MOSFET to control current. ( a lot of component count)
I like to have an alternative solution, can I use LM317?
LM317 can be configure as constant Current mode, but can I control the current by using PIC MCU, i have no idea on how to interface it.
Any idea? or other possible method?
Thank you,
I am designing multiple channel programable constant current source for LED light source of Camera.
From previous help from here,
Possible method is using V to I , a shift register CD4094 output connect to R2R (DAC) generate a V, input to opamp (buffer), and output to MOSFET to control current. ( a lot of component count)
I like to have an alternative solution, can I use LM317?
LM317 can be configure as constant Current mode, but can I control the current by using PIC MCU, i have no idea on how to interface it.
Any idea? or other possible method?
Thank you,