Chris Quesada Pierre Hibart

DC MANIPULATOR

We are designing a circuit that will allow a Legacy Rebel® 800 Watt Amplifier to supply power to two mounted 12 inch Pyle Blue Wave ® Subwoofers, to be used with a basic home electrical outlet.

OUR PROJECT:

Home Outlet (AC)

Circuit Design

DC Convert

er

Car Amplifi

er

Sub

woofe

rs

Most of are project involves using components that are preassembled and designed for related, but other functionality.

In depth, we will use a standard charger that plugs into a basic electrical outlet that will basically convert the AC voltage to DC voltage. Originally we were going to perform this design but in order to make a safe converter we needed a few components that were not provided in the lab and were not in stock at our local hardware stores, so we worked with what we had.

After testing the adapter’s output voltage to be 19.4 volts, we used a voltage divider to cut the voltage down to 6.4 volts.

DETAILS

We divided the voltage so that we could incorporate a DC voltage doubler schematic that we learned.

I mentioned it is a voltage doubler, and we cut our source voltage to be 6.4 volts, when the amplifier requires 12V input to function. We could have done 6 volts and doubled it to 12 volts; however, in order to account for actual values that tend to vary in relation to theoretical values, we used 6.4V.

Once design is completed the circuit will output a theoretical value of 12.8 volts. In research, the amplifier will function with a minimum voltage of about 11.8 volts.

DETAILS CONTINUED

ResistorsCapacitorsDiodesStandard Laptop

Charger800 Watt Amp2 12’’ SubwoofersICN555 Timer

COMPONENTS

Simple Voltage Divider

Voltage Booster Circuit (Doubler)

Input from voltage divider

Outp

ut S

end

Volta

ge sig

nal to

A

mp

Simple Voltage divider that lets us manipulate the output from AC adapter

Charger Schematic

Output of Charger becomes input of the voltage divider

We first tested the output of the schematic by measuring it with the digital multimeter in lab. Once we confirmed our output voltage of approximately 12.4 volts, we hooked it up to our amplifier.

On the next few pages you will see a few pictures depicting our process of building our circuit, checking voltages, and successfully powering the amplifer.

RESULTS:

This photo depicts us taking the output voltage from the laptop charger onto our circuit board before we use the voltage divider

Click icon to add picture

This photo depicts us connecting the circuit to the amplifi er without any power source connected. Notice how there are mult iple wires going to the amplifi er, one is ground, one is the 12 volts input, and the other is a basic remote signal of any voltage less than or equal to 14 volts. Notice the amplifi er is off .

This picture shows that the circuit design we used works. The amplifier is powered on.

Yes, there are easier and diff erent ways to complete this, we chose this way to demonstrate the use of a voltage booster (doubler) that we learned.

NOTES/MODS/ALTERNATES

We did not have many issues with this design, we did however have two or our capacitors burn out because we left it powered on for a longer period of time. We actually anticipated this problem, but we had a few extra capacitors just in case.

ISSUES?

THAT’S OUR PROJECT, THANK YOU

Pierre Hibart Chris Quesada