Hi everyone, sorry as usual for my cluelessness.
I am adding the Audio board to a design which currently uses I2C with 4.7k pull up resistors on each channel. I noticed the Audio board also has pull ups of 2.2k on these channels.
Using science(?!), I see that the combined resistors in parallel give me
1/R = 1/R1 + 1/R2
1/R = 1/2200 + 1/4700
and R at around 1499.
Will this be enough, or should I change my existing resistors to match the total 4.7k? Then maths fails me, because I can only see how a negative value would work.
Thanks as always for your help
I am adding the Audio board to a design which currently uses I2C with 4.7k pull up resistors on each channel. I noticed the Audio board also has pull ups of 2.2k on these channels.
Using science(?!), I see that the combined resistors in parallel give me
1/R = 1/R1 + 1/R2
1/R = 1/2200 + 1/4700
and R at around 1499.
Will this be enough, or should I change my existing resistors to match the total 4.7k? Then maths fails me, because I can only see how a negative value would work.
Thanks as always for your help