No special tips. Just make sure every component you use is rated for this range and that its critical parameters within the desired range across the temperature range you want to support.
On Dec 7, 2016 11:55 PM, "P.S" <[email protected]> wrote: > Dear Ytai, > I will be starting to make a version of IOIO with Crystal and opensource > it. Any tips with respect to hardware/software design so that the board can > withstand higher ambient temperature? > > Thanks in advance > > > On Saturday, 9 July 2016 01:00:24 UTC+5:30, Ytai wrote: >> >> The table titled "internal RC accuracy" in the datasheet specifies a >> typical 0.15% deviation, but a worst case 1% across the temperature range. >> USB's nominal requirement is 0.25%. So if you want to be 100% certain you'd >> need to add a crystal to the circuit (and make a configuration flag change >> in the bootloader). Otherwise, you can characterize it yourself and see how >> bad it actually gets. >> >> On Fri, Jul 8, 2016 at 5:18 PM, Pranay Sharma <[email protected]> >> wrote: >> >>> HI Ytai, >>> I checked the data sheet of the PIC micro used in IOIO board but I am >>> not able to figure out which graph to see to understand the oscillators >>> behaviour to temprature changes. >>> Further, is there a link to exact BOM of the parts used for IOIO with >>> exact part names? >>> Thanks for your time >>> >>> On Friday, July 8, 2016 at 6:56:40 AM UTC+5:30, Ytai wrote: >>>> >>>> I haven't done any work to characterize the temperature range or design >>>> for a specific one. You'd have to do that be checking the datasheets of the >>>> individual parts. I'm assuming that 85C should be safe for most if not all >>>> parts. Another thing you'd need to evaluate is how stable the internal >>>> oscillator of the PIC is across the temperature range. USB is pretty picky >>>> about the precision of its clock. >>>> >>>> On Wed, Jul 6, 2016 at 12:59 PM, Pranay Sharma <[email protected]> >>>> wrote: >>>> >>>>> Dear ALL, >>>>> Could someone put some light on what are the temperature ranges for >>>>> proper operation of the IOIO board. >>>>> >>>>> I was thinking to use this board for a product which would be put >>>>> outdoors where maximum temperature in summers is 45Deg Celcius. >>>>> So the expected temperature inside the board could easily reach 55deg >>>>> or 60Deg. >>>>> >>>>> BR >>>>> Pranay >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "ioio-users" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To post to this group, send email to [email protected]. >>>>> Visit this group at https://groups.google.com/group/ioio-users. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "ioio-users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at https://groups.google.com/group/ioio-users. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
