Digital Volume Control

[FOOKz™]

I am starting a 200 Watt High power digital amplifier with two push buttons that control the master volume. Soon coming out with a personal pocket version thats only 20 watts. the push buttons control the volume up and the volume down. This project will not use a PIC. I have yet to draw the schematic and post pictures.

Parts List:

NTE4066B Bilateral Switch
NTE4029B UP/DOWN BCD Binary Counter
CD4013B Dual D-type Flip Flop with Reset and Clear
74HC393 Dual 4-Bit Binary Counter with Preset and Reset
LM339 Quad Comparator
4 Segment Green Bar Graph LED Display
3 Segment Yellow Bar Graph LED Display
2 Segment Red Bar Graph LED Display
N/O 3mm Tactile waterproof Push Button
NTE4011B or any equivalent NAND gate
4511B BCD to 7-Segment LED Display Driver
7-Segment LED Display
Capacitors
Resistors
Coils
50 Amp Bridge Rectifier
7805 +5Volt DC Regulator
7812 +12Volt DC Regulator
N-JFET Transistors
High Power MOSFET Amplifying Transistors
1:6 Step down center tapped transformer
2:3 Step Up audio transformer
Isolator transformer
Female Audio Jacks
CPU Cooling Fan
SPST Switch
12"x28" - 3/16" Plexi glass
PVC Cement


** I have most of these parts

Edit: Started Breadboard the 4066 Resistor network and testing which resistors are best fitting for volume control.



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Constructed the DC Power Supply
DC Power Supply Schematic:



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Volume Control Schematic:



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Main Amplifier Circuit:

[FOOKz™]

:bump

everything's still in beta testing and i have killed a few 386 OP AMPS on the process.

I need to do a bit more math before the MOSFET Power amplifier transistors come into the picture.

The MOSFETS aren't cheap almost $26.00 per transistor. Especially the Audio DMOS type.


I killed a Transistor and melted a breadboard today after testing.

this is really, ummm whats the words: Insubordinate and not cool.

[FOOKz™]

I jacked some SI - T-NPN power amplifying transistors [NTE130] from work today.

Specs on Package --
 - V_CBO: 100v RMS
 - V_CEO: 60v RMS
 - V_EBO: 7v DC RMS
 - I_C: 15A
 - P_D: 115W MAX
 - h_FE: 45 (typical w/ normal saturation)
 - I_T: 3MHz (typical w/ normal biasing)

[FOOKz™]

Parts List Subject to change since this project is still under development.

Unofficial Parts List At the Moment:
Measurements are to US Standard
QTY        |       NAME
- Digital ICs:
8        |       4013B Dual D-type Flip Flop with Reset and Clear
4        |       4011B or any equivalent NAND gate
6        |       4029B UP/DOWN BCD Binary Counter
4        |       4049B Hex Inverter
8        |       4066B Bilateral Switch
8        |       74HC393 Dual 4-Bit Binary Counter with Preset and Reset
4        |       741 OP Amps
2        |       LM386 OP Amp/Comparator
12        |       LM329 Quad Comparator
5       |        4511B BCD to 7-Segment LED Display Driver

- Analog Components:
2        |       2n2222 NPN Switching
1        |       2n3906 PNP Switching
4        |       2200 Micro-Farad 200Volt Electrolytic Cap
4        |       470 Micro-Farad 250Volt Electrolytic Cap
4        |       220 Micro-Farad 50Volt Electrolytic Cap
4        |       Slider 10 Pico-Farad Cap
2        |       100 Milli-Henry Inductor
2        |       22 Milli-Henry Inductor
2        |       RSH-36-EMNL 8 Ohm 18mm 60 Watt BASS Speaker
2        |       RM-1841SP-NL 8 Ohm 18mm 60 Watt MID Speaker
2        |       RMII-1853-NL  8 Ohm 18mm 60 Watt Speaker

- Resistors-Capacitors:

Potentiometers
--------------

- Switches & Relays
14       |      N/O 3mm Tactile waterproof Push Button
6        |      N/O 8mm Tactile extended waterproof Push Button
2        |       SPDT Switch
4        |       20 Amp 140 Volt DC RMS Auto-Reset Breaker

- Diodes and Power Components:
2        |       50 Amp 300 Volt Power Bridge Rectifier
2        |       BZP61-22 35 Amp 27 Volt Power Zener Diode
4        |      STB16FN06L 60v N-Channel Low Current MOSFET
4        |      2N7002 TO-92 Low Q, N-Channel Static MOSFET
6        |      4 Segment Green Bar Graph LED Display
6        |      3 Segment Yellow Bar Graph LED Display
6        |      2 Segment Red Bar Graph LED Display
5        |      7-Segment RED LED Display
1        |      1:6 Step down center tapped transformer
1        |      2:3 Step Up audio transformer
2        |      Isolator transformer
4        |      7805 +5Volt DC Regulator
4       |      7812 +12Volt DC Regulator

- Hardware Parts:
1        |       3/16" Thick Aluminum sheet 2' x 6 1/2'
2        |       11/32" Diam. Soft Copper-Silver Heat-Pipe [1' Long]
1        |       1/4" Thick Clear Lexan Sheet
8        |       1/16" Vex Kit Nuts and complementary Bolts
4        |       Plastic 5mm LED holders

- Plastics and Other Hardware:
8        |       Lexan washer bushings
8        |       Mica Insulators
6        |       3M self adhesive Rubber stopper
1        |       PVC Cement
1        |       1K Ohm Conductive Foam
4        |       Centrifugal CPU Cooling Fan
6        |       Copper-Aluminum Heatsinks
 

[FOOKz™]

Here are some photos of old progress, im dusting this one off for now.

From top to Bottom:

- 4029 Presetable Binary Up-Down Counter With Carry
- 4066 CMOS Bilaterals

- Power Supply Parts
- Bridge Rectifiers
- Capacitors
- High Wattage Diodes

- Bread boarded Digital VU Meter and LM386 Preamp circuit

- Parts laid out