This is the original chipamp.com board for the LM3886 amplifier, generously released into the public domain by its designer Brian Bell. The board size is 30x74mm so comes in really cheap when ordering. Although the schematic is provided below, it is also worth having a look at the datasheet for more information.
Click here to download the gerber zip file.
Click here to download the original build manual which also includes the bill of materials.
You may also be interested in the power supply, details can be found here.
I want to order the LM3886 PCB how can i do this.
Hi,
It’s just a simple matter of downloading the Gerber file from this page and uploading it to a manufacturers website.
I wrote a page with some more detail here.
https://enjon.uk/2019/10/11/a-novices-guide-to-getting-pcbs-fabricated/
Hi,the Gerber file in this page is not from LM3886 pcb but from Psu pcb.Plese can you provide the Gerber file for LM3886 pcb,I will order this.Thanks and regards.
Hi,
changed to correct file, thanks for letting me know.
Is it possible to use following schematic with this pcb?
http://dogbreath.de/Chipamps/GainCardCopy/GainCardCopy.html
thanks
Hi,
I haven’t taken the time to examine the differences (if any) between the two schematics, but the board is a realisation of a specific schematic. Do you mean can you use the values from the linked gainclone? If so, you can certainly try different values, but it might be better to build the amp as detailed here, then listen and/or measure to see if there are any deficiencies that can be overcome. You can get the boards manufactured and delivered for very lost cost and the parts are very cheap to buy which will allow you to experiment.
Hi, have you try put this gerber to jlcpcb ?
Hi,
Yes, I have tried uploading these to JLCPCB, although I have never ordered or built them. At the moment these would cost £1.48 for 5 (plus shipping) from JLC.