Things You'll Need:
- Soderless breadboard
- Labeled grid
- MPSW45A Darlington transistor
- Two 100,000 ohm resistors
- 10,000 ohm resistor
- 50 ohm resistor
- 9 volt battery
- Small speaker
-
Step 1
Install the transistor to the base. You need to connect a NPN transistor to the solderless breadboard. The MPSW45A Darlington transistor is actually two transistors in one packaging that increases the amplification. You must connect the transistor at J27, J28 and J29. Then connect the jumper wires from I22 to I27 on the labeled grid on the breadboard.
-
Step 2
Divide the voltage. You must use transistors with the same ohm. Connect one 100,000 ohm resistor the positive side if the 9 volt battery. Then connect the other one to the negative side. This will cause the voltage to be split in half where the resistors meet.
-
Step 3
Connect the 100,000 ohm resistors and battery to the breadboard. You need to connect one resistor to the grid from H27 to H28. Then connect the other resistor to the grid from I28 to I29. You must install the negative side of the battery to F26 and the positive side to F34.
-
Step 4
Stop distortion. You need to install the 10,000 ohm resistor to stabilize the voltage and eliminate distortion in the sound. Connect it to the grid from G20 to F28.
-
Step 5
Set the wattage for the amplifier. This amplifier can handle 1 watt of power without over heating or draining the battery too quickly. You must install the 50 ohm resistor from I33 to I34 in order to regulate the watts.
-
Step 6
Hook up the speaker. You need to connect the speaker to the breadboard. Connect it from F29 to J33 on the grid.
Comments
RFDXOP said
on 8/27/2008 "An amplifier's basic purpose is to increase the frequency of the hertz produced by audio waves."
What??? Where did you "learn" basic electronics??
The purpose of an AMPLIFER is to increase the AMPLITUDE of an input signal, or to AMPLIFY it!
Usually, you want the output signal to be as similar as possible to the input signal (low distortion) but of greater AMPLITUDE. This is a very desirable characteristic of amplifiers in general and audio amplifiers in particular. Remember the term "high fidelity"? As to "increasing the fequency of the "hertz"(s/b Hertz, named after Heinrich Hertz an incredibly talented early experimenter/physicist who may actually have "discovered" radio) this is hogwash! It sounds like you're trying to talk about a frequency multiplier circuit rather than a straightforward amplifier. The charcteristic that you generally want to have in an amplifier is gain, (ampli
D-Vine said
on 7/30/2008 Ok, have a lot of questions...
how about the part where u forgot the audio input? What about those connections made at G20, I22 and F26? Since there are no other connections on row 20, 22 or 26 they go nowhere... unless they are used for the audio input, but then again that only needs 2 connections, so which of the 3 and what's the 3rd for?
Resistors... how can you connect the resistor to the battery and to 2 other places on the board when a resistor only has two legs?
Transistor... u forgot to tell which ones needed to be placed where, because on a transistor you have 3 sides, the emitter, collector and base, luckely there's a site called howstuffworks that has a simplified scematic of an aplifier, on which it says that the speaker must be connected to the collector, the - side of the battery to the emitter and one of the audio input wires to the base, is that correct?
Upgrading...
agbotech said
on 6/16/2008 i am now coming to learn so please help me out