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Entry  Tue Aug 23 17:05:20 2016, Praful, Update, Electronics, Soldered Circuit Working 10x
    Reply  Tue Aug 23 22:58:16 2016, Koji, Update, Electronics, Decoupling capacitor 101 
       Reply  Wed Aug 24 14:44:33 2016, Praful, Update, Electronics, Decoupling capacitor 101 
          Reply  Wed Aug 24 19:37:55 2016, Koji, Update, Electronics, Decoupling capacitor 101 
Message ID: 12433     Entry time: Tue Aug 23 17:05:20 2016     Reply to this: 12435
Author: Praful 
Type: Update 
Category: Electronics 
Subject: Soldered Circuit Working 

I remade another soldered circuit, adding extra 100uF electrolytic bypass capacitors at the input and output of the voltage regulator and ensuring that every grounded component now has its own path to ground rather than going through other elements. This circuit now seems to be working just like the solderless circuit. Attached is the transfer function of the soldered circuit, which matches with the result from the solderless circuit.

 

soldered_transfer_function.png

solderless_transfer_function.png

Here are both on the same figure- they are about overlapping but are slightly different if you zoom in enough.

both_transfer.png

I have also attached a new version of the circuit schematic to reflect the changes and to make the physical layout more clear.

simple_ampv2.pdf

My next step for these last few days this summer will be designing a PCB using Altium. I've emailed Varun about how to use Altium on the iMac but he hasn't responded. If anyone else knows how to use the software, please let me know.

Attachment 2: soldered_transfer_function.png  52 kB  | Hide | Hide all
soldered_transfer_function.png
Attachment 3: soldered_transfer_function.png  52 kB  | Hide | Hide all
soldered_transfer_function.png
Attachment 5: solderless_transfer_function.png  52 kB  | Hide | Hide all
solderless_transfer_function.png
Attachment 6: both_transfer.png  58 kB  Uploaded Tue Aug 23 18:18:48 2016  | Hide | Hide all
both_transfer.png
Attachment 8: both_transfer.png  58 kB  Uploaded Tue Aug 23 18:19:14 2016  | Hide | Hide all
both_transfer.png
Attachment 10: simple_ampv2.pdf  25 kB  Uploaded Tue Aug 23 19:15:11 2016  | Hide | Hide all
simple_ampv2.pdf
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