alchemist Posted December 15, 2013 Report Share Posted December 15, 2013 Hello, I am soldering a MBHP_DOUTX4 V2, but I don't see clearly where to put the 4+1 caps on the board: the photo is not clear enough, and the caps are not mentioned in the Eagle board files. Thank you for the help! Quote Link to comment Share on other sites More sharing options...
niklasni1 Posted December 17, 2013 Report Share Posted December 17, 2013 The caps are normal bypass caps from the power supply line to the ground line of the ICs. These are mounted close to the chip to act as a small local current storage, so that when the chip suddenly draws a lot of current (like when it switches state), it can get some of it very quickly from the capacitor. This helps keep the power supply smoother in the circuit. (At least, this is my meagre understanding of it.) For all 74xx logic ICs like the shift registers on the DOUT modules, if you look at the chip so pin 1 is top left, the power supply pin is the top right pin, and the ground is the bottom left. The docs also specify a cap from the main power input to the main ground pin. Quote Link to comment Share on other sites More sharing options...
alchemist Posted December 17, 2013 Author Report Share Posted December 17, 2013 OK, I think I see what to do. Thank you for the reply :) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.