Greetings, Like I said before, it sounds like a neat project.
Using the external chip is fine, go for it! But it does look like you could get picmicro's with 5 channels of hardware PWM for about $1.90 US, and your TI chip costs about the same for 8 channels. William On Oct 11, 3:49 am, Sebastien Lelong <[email protected]> wrote: > Hi, > > Using microchip chip to provide hardware PWM channels would cost a lot more > than having a dedicated chip, don't you think ? That's really annoy me: > there are so few PWM channels in PIC compared to Atmel... > > I was thinking to use a PIC as controller of the whole board: commands would > be sent to it, then it would throw them to dedicated PWM chip. It could add > i2c interface, could store parameters for each servos, store sequence of > commands, maybe with an extra EEPROM. Would it still sound like a surrender > ? ;) > > Cheers, > Seb > > > > > > > Sounds like a great project! > > > But if you are gonna have two chips ( JAL chip + PWM chip), why not > > just use two JAL chips? I've used the 3 channel 16F777 in the past, > > and a quick scan of microchip shows some 5 channel devices available > > for 16F and 18F. > > > William > > > On Oct 10, 2:32 pm, Sebastien Lelong <[email protected]> > > wrote: > > > Hi guys, > > > > I'm still thinking about a nice servo controller made in jallib (at least > > 8 > > > channels I'd say). Goal would be to provide a Jaluino shield too. While > > we > > > already discussed about implementing PWM in software, this can give > > problems > > > of accuracy. What about using a dedicated chip, like TLC5940 ? > > > >http://focus.ti.com/docs/prod/folders/print/tlc5940.html > > > > It's used to control LEDs, but it seems it can be used to control servos > > too > > > (in some arduino references). > > > > Don't you think it would speed up development of such controller ? > > > > Cheers, > > > Seb > > > -- > > > Sébastien Lelonghttp://www.sirloon.nethttp://sirbot.org > > -- > Sébastien Lelonghttp://www.sirloon.nethttp://sirbot.org --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/jallib?hl=en -~----------~----~----~----~------~----~------~--~---
