Author Topic: Why use a Bypass Capacitor for EACH IC in the circuit?  (Read 15724 times)

0 Members and 1 Guest are viewing this topic.

Offline T3sl4co1l

  • Super Contributor
  • ***
  • Posts: 14736
  • Country: us
  • Expert, Analog Electronics, PCB Layout, EMC
    • Seven Transistor Labs
Re: Why use a Bypass Capacitor for EACH IC in the circuit?
« Reply #50 on: September 17, 2014, 08:16:14 am »
What's all that stuff up along the top and bottom sides?  Those look like they need power too!

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 

Offline Falcon69

  • Super Contributor
  • ***
  • Posts: 1475
  • Country: us
Re: Why use a Bypass Capacitor for EACH IC in the circuit?
« Reply #51 on: September 17, 2014, 08:22:48 am »
The throughhole pads on the top and bottom are for the LED assemblies. They have 3 wires for the. Ground, Park, and Brake.  They are connected through the transistors/Mosfets for switching purposes and latching.

The ones on the side are for Left/Right turn signal, Park, and Brake inputs, and the top one is for the main power and ground in.  The very top, where the jump headers are, is so I can connect (if needed) two external Buck/Boost regulators if I cant get the correct voltage to the LED's through the mosfets and transistors.  I am not sure if the battery power from the vehicle is good enough.

But, for this thread, I'm mainly just interested in if the Bypass Capacitors are placed correctly. I tried to put them as close as I could to the power/ground inputs of the IC's.
 

Offline eetech00

  • Regular Contributor
  • *
  • Posts: 64
Re: Why use a Bypass Capacitor for EACH IC in the circuit?
« Reply #52 on: September 18, 2014, 12:31:37 am »
But, for this thread, I'm mainly just interested in if the Bypass Capacitors are placed correctly. I tried to put them as close as I could to the power/ground inputs of the IC's.

Hi

So....I'm sure others, as well as myself, would like to help but, without making assumptions, how are we supposed to know which pins are power and ground?

Also, as a suggestion, for this kind of board, place a ground pour on both sides to eliminate ground traces and some via's...

eT
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf