On 1 sep, 20:15, vasile surducan <[email protected]> wrote: > Everything depends on the project status volume. For 100pcs an LDO of 1euro > is damn expensive. > At volume LDO (at 100pcs) must be in 0.15-0.2euro/pcs > If wrong choosed, 3.3V and 5V are an issue, you can see this after the first > 100 programming times... when need to switch jumpers. No probnlem with one > hobby board.
This is targeted for hobbiest, hoping that if it's a success, another double sided pro board would be designed. > Thermal dissipation on 3.3V could be also a problem. Imagine a communication > bus at 120mA (maybe you don't need it, like RS485) and a common unstabilised > power supply of 9V input (need 4V dropout on common/inexpensive 5V LDO). The > 3V3 stab will dissipate 9V-3.3V =5.7V*0.12A = 0.7W > Size can be another problem if 10% of your board is occupied with a TO220 > which is loaded with 1W. Can't we get 3.3V out from 5V ? I've read most regulator accept at least 4.75V as input. > For hobby it's good, but those hobby projects will be someday production > projects... I see this based on your complicated code. > Do you mean that our code is so good that it gets used in production projects ? :) Cheers, Seb --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
