hello guys,
this is just a very short and hope simple question to see if someone can give me some advice.
I am working on a project and when I received the PCBs i realized i had made a mistake:
I wanted to assemble a toslink transmitter like this below, that i believe is a very common way (i include the power part of it as it might be relevant to the question):
But i forgot, or deleted by mistake, C7, that i believe is there to filter noise from the VCC that supplies the toslink transmitter. What i have on my printed PCB is this:
Ok, i think it should not be a big deal, i have other PCBs with toslink transmitters without any filtering in VCC that work fine, but i wanted to know what is the best, or least bad options that i have, also to learn a bit from your answers.
As the PCB is not populated yet, i have some freedom to instead of the ferrite bead B1, place any other part there. With this in mind, i think i could....:
- Place a 0 Ohm resistor instead of the ferrite bead B1 and call it a day, the VCC line already has plenty of filtration.
- Don't worry, add the ferrite bead B1 and forget about the capacitor (this is the option i have more doubts about, i am not sure if the ferrite without capacitor could do more harm than good)
- I could actually solder the capacitor between the VCC and GND pins of the toslink transmitter on the botton side. It will look messy and awful, and might be one day the capacitor just falls off, but i really need this capacitor there and this is definitely the way to go no matter what.
- Other options....
(PS: all the traces are very short, like 2-3 cm maximum from the caps of the 3.3V line filter to the pin of the toslink transmitter)
Thank you for your answers, i appreciate them.
this is just a very short and hope simple question to see if someone can give me some advice.
I am working on a project and when I received the PCBs i realized i had made a mistake:
I wanted to assemble a toslink transmitter like this below, that i believe is a very common way (i include the power part of it as it might be relevant to the question):
But i forgot, or deleted by mistake, C7, that i believe is there to filter noise from the VCC that supplies the toslink transmitter. What i have on my printed PCB is this:
Ok, i think it should not be a big deal, i have other PCBs with toslink transmitters without any filtering in VCC that work fine, but i wanted to know what is the best, or least bad options that i have, also to learn a bit from your answers.
As the PCB is not populated yet, i have some freedom to instead of the ferrite bead B1, place any other part there. With this in mind, i think i could....:
- Place a 0 Ohm resistor instead of the ferrite bead B1 and call it a day, the VCC line already has plenty of filtration.
- Don't worry, add the ferrite bead B1 and forget about the capacitor (this is the option i have more doubts about, i am not sure if the ferrite without capacitor could do more harm than good)
- I could actually solder the capacitor between the VCC and GND pins of the toslink transmitter on the botton side. It will look messy and awful, and might be one day the capacitor just falls off, but i really need this capacitor there and this is definitely the way to go no matter what.
- Other options....
(PS: all the traces are very short, like 2-3 cm maximum from the caps of the 3.3V line filter to the pin of the toslink transmitter)
Thank you for your answers, i appreciate them.