On Tue, May 11, 2010 at 10:02 PM, Florin Tanasa <[email protected]>wrote:
> Hi Vasile, > > On Tuesday 11 May 2010 07:03:11 vasile surducan wrote: > > On Mon, May 10, 2010 at 12:46 PM, Florin Tanasa > <[email protected]>wrote: > > > Hi Vasi, > > > > > > On Monday 10 May 2010 22:10:44 funlw65 wrote: > > > > Hi Florin, > > > > > > > > Be careful, test the 555 pulse generator on a breadboard first. It > can > > > > be very noisy (at least SN7400N quadruple 2-input NAND gate, used by > > > > me as train pulse generator, it was). If you have too many pulses as > > > > normal then you must use an "optocoupler" between (or maybe using an > > > > 12F675 as pulse generator with a potmeter on an adc input to > > > > increasing/decreasing frequency?). > > > > > > Thanks for the tips. > > > Hi all, > > > I change the schematic and now looks like easypic6 :) > > > Other opinions? > > > > > > > > > > > > I guess you're on the same boat with Vasi (looking at the pictures > of > > > > wind rattle with romanian and EU flag on the tail...) > Something like that, but now I change the tail with a new, now I do not > have > any flag. > > Your schematic has too small fonts on VDD and VSS and is hard to read. > > If you want opinions, please edit your schematic in such manner it can > be > > easily read. > > > Fonts are really pretty low for VDD, now we have expanded. > Thank you for your attention. > > You are using two supply voltages on your board. Are you sure your LCD/GLCD/DS18B20/555/DS1307 does not work at 3.3V ? Your keypad does not have a common interrupt output? On PWM and power outputs connectors you need an open collector and a positive power voltage rather than GND which is useless. You have the same ground for both analog inputs and power outputs (mostly PWM which are noisy as hell) There is no loESR capacitor on your board. It must be at least one in the PWM/power section. SW7 is short-circuiting SW1 to SW6, why is that necessary? RV1 to RV3 are useful if are connected to something (analog encoder, actuator feedback, etc) and having three hand-actioned potentiometers on the same board can be used with difficulty. Clock calendar is just a fancy extension, on most PICs is not necessary, and if you don't have battery backup can be useless. Instead of JP10 and JP11 why don't you connect RV5 between VEE and +5V. My consulting fee is 50 euro/hour for amateur designs. thank you, Vasile -- 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.
