(Bass-) Guitar Amp

I want a small bass guitar amp to play at home. Would be fun to convert some old speakers…

Little Gem

Small 386 based amp, guitar focused. Very simple.

• Orginal design

Ruby

Enhanced version of the Little Gem, with an input buffer. Option for bass specific optimization.

• Orginal design
• Blog Posts:
  • https://langster1980.blogspot.com/2014/05/lm386-ruby-amplifier.html
• PCBs for sale: Five Cats Pedals, Tayda (Documentation)
• PCBs not for sale: 1 2

Noisey Cricket

POstdecessor of Little Gem and Ruby, now with a Tone nob.

• Original Design
• Kit for sale from UK
• Blog post

Other designs

by “blueberry” on OSHpart

• 10W Class D Amp
  • More information on it
• 5W class D

Others

• Tiny Giant
• Honey Amp
  • OSHpark PCB

Battery power

Using LiIon Cells instead of 9V blocks

• Mastodon Thread 1S vs 3S

1S solution

• Boost Converter -> MT3608?
  • Modules for testing: 1
  • Datasheet
  • Available at LCSC
• Battery Protection -> DW01?
  • Avilable at LCSC
  • Seems to be used on TP4056 charging modules as well -> Blog post series
  • Potential alternative: FM2113 - might be pin compatible?
• Charing: TP4056
  • Datasheet
  • Blogpost on hackaday