S
Sambo
- Jan 1, 1970
- 0
I am building dual adjustable power supply that will double as ( most importantly) a charger
for both 1.2 and 12V batteries.
The manual adjust at present is 240 sense and 3.3K with paralled switched in 10K pot ( not to easy to adjust to .1V when I was charging 4.8V stack backup battery).
I can't decide how to control the regulators.
I was considering ls373/R2R at first but it seamed to complicated.
I suppose dac08/opamp is an option which I have around but I started considering PWM
if I could achieve small enough (50mV) ripple across the 1.25-~24V range
if it was subsequently used for cap or transistor measurements.
Is that achievable?
I just got an 28 pin PIC18f2023 for this but if I use 16f877 I could have 16-18 pins
to play with (9 bits per side, still not very elegant).
Thanks Sam.
for both 1.2 and 12V batteries.
The manual adjust at present is 240 sense and 3.3K with paralled switched in 10K pot ( not to easy to adjust to .1V when I was charging 4.8V stack backup battery).
I can't decide how to control the regulators.
I was considering ls373/R2R at first but it seamed to complicated.
I suppose dac08/opamp is an option which I have around but I started considering PWM
if I could achieve small enough (50mV) ripple across the 1.25-~24V range
if it was subsequently used for cap or transistor measurements.
Is that achievable?
I just got an 28 pin PIC18f2023 for this but if I use 16f877 I could have 16-18 pins
to play with (9 bits per side, still not very elegant).
Thanks Sam.
