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Recent Forum Posts

Re: Increasing resolution of DTs MIBAM library?

And then you can use the dedicated PCA9685PW chip with 16 channels, 12-bit resolution, cheap and very reliable. Also the PCA9956BTW at 24 channels @ 8 bit.

Ioannis
Ioannis Yesterday, 15:54

Re: Increasing resolution of DTs MIBAM library?

Hah, just solved it :)
since I have output transistors, previously I was feeding their bases with output from MCU
Now I will feed their emitters via MCU, connect all bases together and connect them...
CuriousOne Yesterday, 06:38

Re: Increasing resolution of DTs MIBAM library?

Well that's nice idea, but selection of pins to where you can map HPWM - is quite limited as I know.

I had another idea - use MIBAM as is, but feed outputs to logical AND gate and use built in PWM...
CuriousOne - 16th September 2025, 08:48

Re: Increasing resolution of DTs MIBAM library?

Darrels documentation says
In order to increase the resolution to 10 bits the LSB would need to be 1/4 of its current length meaning you'd need the PIC to run at 192MHz. Or you'd need to reduce the...
HenrikOlsson - 16th September 2025, 05:54

Re: Increasing resolution of DTs MIBAM library?

I'm using MIBAM because with 64mhz PIC18 CPU, I can have 48 independent PWM channels. But they're 8 bit. I want 48 channels with 9 or 10 bits resolution (12 - preferable) :)
CuriousOne - 14th September 2025, 21:01

Re: Increasing resolution of DTs MIBAM library?

More channels is totally a different thing from resolution as you stated on post 1...

Maybe you can do that in assembly. A bit difficult though.

Ioannis
Ioannis - 14th September 2025, 15:11

Re: Increasing resolution of DTs MIBAM library?

Unfortunately, there are no PIC chips with like 8-16-32 independent PWM outputs.
Sure, there are chips like LT8500, with 48 channel PWM output, but they're way too expensive...
CuriousOne - 14th September 2025, 05:34

Re: Bitbang USB protocol?

Yes, it has been done on an AVR. See this link for the V-USB

https://www.obdev.at/products/vusb/index.html
Jerson - 14th September 2025, 04:47

Re: Bitbang USB protocol?

only in their dreams

https://en.wikipedia.org/wiki/USB_communications
richard - 14th September 2025, 01:08

Bitbang USB protocol?

So maybe bitbang isn't the right word, but I am wondering if anyone has attempted USB communication on a chip without integrated USB functionality. I'm aware chips like the 18F2550 include that...
achilles03 - 13th September 2025, 17:41

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