my first attempt was bulky and used two 9V batteries
Amptoids #1 on the left and newer prototype on the right! The newer one has a 1/4" mono input for a guitar or bass, an 1/8" input for an iPod or CD player, and an 1/8" headphone out.
The original amptoids used a salvaged cd player headphone amp while the newer one is op amp based
Amptoids automatically turn on when a guitar or bass is plugged in!
a 9V battery should last 7-10 hours, I think. The nice LED uses up a little, but it's so slick it's ok.
Assembling a run of five new amptoids instead of assembly class homework.
The Wintergreen Edition Amptoids circuit on the right includes useless special features such as a green LED and green capacitors.
and a mad rush to find more 9V batteries for picture taking time
room lights off to show off the pretty LEDs (the headphone adapters are just being used to turn on the amps)
I even borrowed the 9V batt from my bass for these pictures.
amptoids also double as flashlights!
six new amptoids in iPod worship
all hail the mighty iPod.