Hi to all... Im currently developing some systems with arduino, and the meain reason of failures is due to electric noise, since I learn how to isolate the noise from the control boar using snubbers and varistors ...
(Thanks a lot for the help of this forum).
The next big deal is the power source, because even with the proper protection on the board, the main lines, can and have lots of noise.
I want to desing a power source near bullet proof, with a good filtration and protection of transcient voltages, and 110/220. Capability.
I design an overly big filter for a cellphone type adapter... but it dont offer a very good filtration.
This is the filter;
http://forum.allaboutcircuits.com/threads/help-with-simulation-on-arduino-vcc-filter.106912/
So I start by thinking in using a regular transformer to have some protection from transients... next to add a bridge rectifier with capacitors to filter some noise in the raw state and after that using a LM317 to have a proper filtration to 7Vcc... and after that a good and large capacitive filter...
I think the power source will be good from 230 to 90VAC due to the 10:1 relation of transformation... this will provide me with a 23 to 9 VAC good to be used on the diode bridge and after in the regulator stage...
I need 6 to 7 VCc for the arduino to work properly.
I have this in mind... Sorry if made some mistakes, I have no formal electronics background.
The C1 and C2.. ceramics... 50Vac and 0.475uF or smaller?
Thanks in advance.
-Alex.
(Thanks a lot for the help of this forum).
The next big deal is the power source, because even with the proper protection on the board, the main lines, can and have lots of noise.
I want to desing a power source near bullet proof, with a good filtration and protection of transcient voltages, and 110/220. Capability.
I design an overly big filter for a cellphone type adapter... but it dont offer a very good filtration.
This is the filter;
http://forum.allaboutcircuits.com/threads/help-with-simulation-on-arduino-vcc-filter.106912/
So I start by thinking in using a regular transformer to have some protection from transients... next to add a bridge rectifier with capacitors to filter some noise in the raw state and after that using a LM317 to have a proper filtration to 7Vcc... and after that a good and large capacitive filter...
I think the power source will be good from 230 to 90VAC due to the 10:1 relation of transformation... this will provide me with a 23 to 9 VAC good to be used on the diode bridge and after in the regulator stage...
I need 6 to 7 VCc for the arduino to work properly.
I have this in mind... Sorry if made some mistakes, I have no formal electronics background.
The C1 and C2.. ceramics... 50Vac and 0.475uF or smaller?
Thanks in advance.
-Alex.