Gear / Technical Help > Battery Boxes, Preamps, Mixers, ADCs, and Processors
Homemade Pre-amp Circuit Help
joeldotc:
--- Quote from: Chilly Brioschi on August 18, 2024, 10:25:29 PM ---Do I see pads for a soic-8 package for the op amp?
Are you using a socket to permit rolling, at least at the onset and during testing?
Or is this much smaller than that?
Kudos for home brewing/experimenting!
Any suggestions for breadboarders or lesser hackers?
That pwb (PCB) looks like it will be field-ready in short time!
--- End quote ---
Thanks :)
It is an soic-8 op amp! I'm not using pins/sockets, so if I wanted to swap around different op amps, they would just need to be soldered in/out which isn't too big of a deal for me. I really like how the OPA1612 looks from its spec sheet, but it would be quite interesting to see how other opas would work too.
I've only ever done minor circuit design before. This was really my first time dipping my toes into any significant electrical design. I found that KiCAD is amazing to use and really recommend it. It only took me about an hour of youtube videos and a few hours of messing around to understand how pcb design works. I really recommend just downloading the software and to try copying an existing Texas Instruments design (like the one Sebastian sent) on it - that'd probably be the fastest way to learn.
I have an engineering degree (mechanical, not electrical), but I'm now a high school teacher on summer break so I've just been spending my free time scratching my engineering itch with this project!
I also chatted with weroflu and decided to change my design - I made it more similar to weroflu's, and now it'll fit inside an altoids which solves the need of making a custom enclosure for what's really a prototype board that I'm sure I'll tweak and change lots after I build and test the first version.
Once it's built I'll post updates here!
Claude:
Browsing around the 'Net, I found this:
https://www.thatcorp.com/datashts/AES129_Designing_Mic_Preamps.pdf
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