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"Sakit" the Simple Amplifier Kit

View CJKIT-21222: "Sakit" the Simple Amplifier Kit Breadboard (Audio)

CJKIT-21222: "Sakit" the Simple Amplifier Kit Breadboard (Audio)

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Jameco Kitpro
Jameco Part no. 2210061
Manufacturer JAMECO KITPRO
Manufacturer no. CJKIT-21222
web exclusive
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$29.95

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1+ $29.95
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"SAKit" the Simple Amplifier Kit

The Simple Amplifier Kit (hereafter SAKit) is ideal for engineers, hobbyists & technicians who want to know analog circuits @ the transistor level before delving into analog ICs.

Description: SAKit is a VFB (Voltage Feedback) operational amplifier designed to make use of five transistors with class AB output stage hookup as an AC coupled non-inverting amplifier. It is the embodiment of a simple classical op amp (a class A output stage will reduce transistor count to four at the expense of lower current sinking capability & efficiency). Although this circuit is quite simple (some might say trivial!!) because there are no emitter constant current source, collector current mirror, output current limiting, etc. it serves to illustrate the starting point in op amp design. Once the kit is built on a breadboard you have a fully functional, one-channel audio amplifier, complete with 2 inch 8 ohm speaker & 3.5 mm phone plug to verify audio performance (subjectively) using an ordinary mobile phone with mp3 player. A 3.5 mm phone jack is provided to listen via headphones. The 3.5 mm jack & plug, speaker & 5 ohms resistor must be soldered to AWG 22 solid wire before inserting into the breadboard.

2 BC546 transistors (Q1 & Q2) with resistors R2 & R3 forms the differential input stage, a 2N3906 transistor with capacitor C3 & resistor R6 as voltage gain stage (aka VAS). Output stage consists of TIP31 Q4 & TIP32 Q5 transistors, diodes D1 to D3 & resistors R7 & R8. Input signal is applied to capacitor C1. Feedback network is composed of C2, R4 & R5; short C1 & C2 to amplify DC signal. Capacitors C8 & C9 prevent DC voltage reaching the speaker. R9 is optional to protect the output stage from short circuit. Recommended power supply is +-15V. The kit comes with an adjustable dual-tracking reference as DC input voltage to the amplifier and a μA741 (maybe the most popular) op amp for operation comparison. Check out what others are saying about the "SAKit" the Simple Amplifier Kit project build!

Please note: Due to inventory packaging methods, you may receive more components than required for some products.

You Will Need

  • Breadboard
  • Multimeter
  • Bench Power Supply
  • Pliers
  • Wire Cutter
  • Screw Driver
  • Solder
  • Hook up wire
  • Audio Source such as CD Walkman, Cell phone, mp3 player etc.

    Optional

  • Scope
  • Potentiometer adjustment tool
  • Wire Cutter Stripper
  • Headphones

    Kit Includes:

    Part No.
    Qty.
    Description
    31114
    10
    47uF 50V Radial Capacitor
    93729
    10
    2.2uF 50V Radial Capacitor
    93761
    10
    100uF 25V Radial Capacitor
    179354
    1
    NPN Transistor
    178618
    10
    2N3906 PNP Transistor
    179215
    10
    1N4148 DO-35 Diode
    181841
    1
    PNP Transistor
    231176
    1
    Male Stereo Plug
    660295
    2
    5 Ohm Wirewound Resistor
    661239
    100
    75 Ohm Resistor
    240427
    1
    10k Potentiometer
    690814
    100
    620 Ohm Resistor
    691067
    10
    6.8K Ohm Resistor
    691104
    10
    10K Ohm Resistor
    806645
    40
    TO-92 General Purpose NPN Transistor
    826793
    1
    LM358P Dual Op-Amp
    830522
    1
    8 Pin General Purpose Op-Amp
    1368771
    1
    8 Pin Voltage Reference
    15413
    10
    220pF 50V Ceramic Capacitor
    320362
    1
    2" 8 Ohm Round Speaker
    2095437
    1
    Audio Jack
    2146302
    10
    0.1uF 50V Capacitor
    609705
    2
    2200uF 35V Radial Capacitor
    2178689
    2
    TO-220 Black Heat sink
    661546
    100
    1.5K Ohm Resistor
    691340
    10
    100K Ohm Resistor
    690988
    10
    3.3K Ohm Resistor
    2163882
    10
    10KOhm Metal Film Resistor
    ---
    1
    Instructions



    Club Jameco Project #21222

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