POCKET SIZED GUITAR AMPLIFIER |
JAMECO PART NO. 2170521
One of the biggest pains of an electric guitar is the need to hook it up to an amp to hear actual electric guitar sound. That’s not a
problem with the milli-AMP! The milli-AMP uses a bridged ML386N-3 amplifier circuit to produce in the neighborhood of two watts
output power. It runs of a rechargeable 9 volt battery that provides an hour of full volume play per charge. At two watts, the milli-AMP is
more powerful than any commercially available amp (that I know of) of its size; its size being a very pocketable 2.25 by 3.5 by 1 inches
(roughly). Volume is controlled by the volume pot on the guitar, and controls distortion as well.
Experience Level: Intermediate | Time Required: 3-6 hours
Required tools and parts:
Case for the charger circuit: I used a case from an Ipod Nano.
Bill of Materials:
IC LM317
ICLM386
Transformer Capacitor,
0.22uF
Capacitor, 10uF
Capacitor, 0.05uF
Battery,8.4 V
Audio Connector
Toggle Switch
Capacitor, 100uF
DC Power Plug, female
DC Power Jack, male
Plastic Cases
Battery Snaps
Prototype board
Solid wire
Capacitor, 1000uF
Resistors, 240 OHM
Resistors, 1.5 K
Resistors, 1.5 M
Transistor Speaker
Potentiometer, 500 OHM, single turn
Wall transformer
Resistors, 470 OHM
Resistors, 10 OHM
Step 1 – Schematics
