Difference between revisions of "Front Panel 8 Bit Assembly Sheet"

From blwiki
Jump to: navigation, search
(Nominal Values)
 
Line 7: Line 7:
 
* Pushbutton height is also a matter of personal preference
 
* Pushbutton height is also a matter of personal preference
 
** My card has 6.5mm height buttons
 
** My card has 6.5mm height buttons
* I use 2.2K for I2C terminators - your system might have different requirements
+
* I use 2.2K for R1, R2 I2C terminators - your system might have different requirements
 
* I mounted the headers on back of the board
 
* I mounted the headers on back of the board
 
** Can use right angle headers if you prefer for a lower profile
 
** Can use right angle headers if you prefer for a lower profile

Latest revision as of 06:31, 1 December 2019

Front panel PCB front and back.jpg

Nominal Values

  • 560 Ohm resistor makes red LEDs not "too" bright at 5V
    • If you want something else experiment to figure it out
  • Pushbutton height is also a matter of personal preference
    • My card has 6.5mm height buttons
  • I use 2.2K for R1, R2 I2C terminators - your system might have different requirements
  • I mounted the headers on back of the board
    • Can use right angle headers if you prefer for a lower profile
Qty Value RefDes Qty Value RefDes
32 LED, 3mm DS1-DS32 1 0.1" Header, 1x2 J1
4 Res, 10K (0805) R3,R4,R6,R7 1 0.1" Header, 1x5 J2
2 Res, 2.2K (0805) R1,R2 1 0.1" Header, 1x4 J3
32 Res, 560 (0805) R5,R8-R38 1 0.1" Header, 2X2 J6
32 SW_Push, 6mm SW1-SW32
4 MCP23017-E/SS U1-U4