19200 Baud In Pic16f690

[MARGARITA]

Now Is Working, I Found Is A Problem With My Power Supply If I Put A 1000 Mf. In Parallel With Power Supply Is Working, Maybe Because High Speed More Sensible To Power Supply Noise, Any Way Thanks Guys Looks That The People Here Are Very Gentil.

[simpsonss]

Now Is Working, I Found Is A Problem With My Power Supply If I Put A 1000 Mf. In Parallel With Power Supply Is Working, Maybe Because High Speed More Sensible To Power Supply Noise, Any Way Thanks Guys Looks That The People Here Are Very Gentil.

hi MARGARITA,

seems like it works with 20 Mhz, i would like to ask a question. I'm facing the same problem as you too. everything works find with 4Mhz OSC but no for 20 Mhz OSC. what u mean by parallel with power supply? i should i connect the circuit?

thanks.

[skimask]

i would like to ask a question. I'm facing the same problem as you too. everything works find with 4Mhz OSC but no for 20 Mhz OSC. what u mean by parallel with power supply? i should i connect the circuit?

http://en.wikipedia.org/wiki/Decoupling_capacitor

Hmmm... 1000mF as decoupling Capacitors - always knew I made my boards way too small... - Melanie

[MARGARITA]

hi MARGARITA,

seems like it works with 20 Mhz, i would like to ask a question. I'm facing the same problem as you too. everything works find with 4Mhz OSC but no for 20 Mhz OSC. what u mean by parallel with power supply? i should i connect the circuit?

thanks.

I FOLLOW INSTRUCTIONS FROM JOE, SKIMASK AND PUT 1000MF CAPACITOR IN PARALLEL WITH 5 VOLTS SWITCHING POWER SUPPY, (SOME ARE POOR FILTERED ) MY WAS ONE.
AND UNTIL NOW MY PROJECT WORKS FINE.

[Archangel]

I FOLLOW INSTRUCTIONS FROM JOE, SKIMASK AND PUT 1000MF CAPACITOR IN PARALLEL WITH 5 VOLTS SWITCHING POWER SUPPY, (SOME ARE POOR FILTERED ) MY WAS ONE.
AND UNTIL NOW MY PROJECT WORKS FINE.

1,000 µF filters are enough to take the ripples off the ocean, I bet your circuit stays powered for hours after unplugging the power supply. What you do need, is a .01 µF , that's point zero one µF near your PIC connected to the power and ground pins, these allow radio frequency noise to get shorted out, resulting in "Clean" DC power to your chip. Those 1000 µF would be great in a high end audio amplifier to filter and act as a backup supply when big power surge requirements arise. Might be you were thinking 1000 PF caps ?

[MARGARITA]

1,000 µF filters are enough to take the ripples off the ocean, I bet your circuit stays powered for hours after unplugging the power supply. What you do need, is a .01 µF , that's point zero one µF near your PIC connected to the power and ground pins, these allow radio frequency noise to get shorted out, resulting in "Clean" DC power to your chip. Those 1000 µF would be great in a high end audio amplifier to filter and act as a backup supply when big power surge requirements arise. Might be you were thinking 1000 PF caps ?

I Know, but with .1 mfd. I have trouble and with 1000mfd. works ok.