just visit them

http://elektronika-elektronika.blogspot.com/

http://my-elektronika.blogspot.com

http://skema-rangkaian-elektronika.blogspot.com

http://tutorial-elektronika.blogspot.com

Elliot Sound Project

http://sound.westhost.com/
Projects by Classification


Project Type Comments
All projects in numerical order Includes brief description


Power Amplifiers and Accessories Power amps, supplies, indicators, soft start, etc.
Headphone Amplifiers/ Adapters Adapt power amps for headphone use, build dedicated headphone amps
Preamps and Accessories Preamps, tone controls, equalisers, phono, etc.
Crossovers and Effects Electronic (active) crossovers, limiters, etc.
Power Supplies Power supplies for preamps, power amps and power switching systems P142
Musical Instrument Guitar, bass and keyboard amps and accessories
Mixers, Meters, etc. Mixers large and small, metering amplifiers, phantom power, etc.
Digital Audio Applications Just like it says ...
Test Equipment Measurement systems, including meters, oscillators, etc. P143
Microphones and mic preamps Again, just like it says ...
Miscellaneous Anything that doesn't fit into the main categories above
Lighting A small selection of lighting effects (desk, dimmers, etc.)
Loudspeakers Subwoofer/ woofer equalisers.

Amplifier using TIP31c

i had built an amplifier mini for my living room. use two TIP31c, in boxcase says it's 30x2 (stereo). need Transformer 3A 25VCT.

Absolute Maximum Ratings Transistor TIP31

VCBO Collector-Base Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Collector-Emitter Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Emitter-Base Voltage 5 V
Collector Current (DC) 3 A
Collector Current (Pulse) 5 A
Base Current 1 A
Collector Dissipation (TC=25 C) 40 W
Collector Dissipation (Ta=25 C) 2 W
Junction Temperature 150 C
Storage Temperature - 65 ~ 150 C

skema

sumber dari Afiata