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General| Input Voltage | 105-125 VAC |
|---|---|
| Output Voltage | 0-20 VDC |
| Output Current | 0-3 Amps |
| Load Regulation | ±0.1% + 5mV |
| Ripple and Noise | 1 mV RMS |
| Display Type | Analog Meter |
Lists the necessary tools for assembling the project, plus optional tools.
Experience in identifying and inventorying project components.
Guidance and practice in proper soldering techniques.
Constructing the unit in a breadboard format for experimental work.
Assembling components and fittings onto the project chassis.
Reviewing and evaluating the project's completion and learned skills.
Visual identification of electronic components used in the project.
The circuit diagram of the Model 803 Power Supply.
Overview of the power supply's circuit stages.
Chart for interpreting resistor color bands and values.
Recommendations for soldering iron wattage and solder core type.
Ensuring the iron tip is tinned and connections are clean.
Proper methods for heating, applying solder, and cooling connections.
Visual examples of correct and incorrect solder connections.
Introduction to breadboarding and the project's circuit stages.
Understanding transformer function and the turns-ratio law.
Instructions for preparing the breadboard base and gathering materials.
Diagram showing bus wire connections to tacks on the breadboard.
Illustration of wiring the power transformer (T1) to the breadboard.
Steps for preparing and securing the AC line cord.
Essential safety rules for working with electricity and circuits.
Demonstrates transformer step-down action by measuring voltages.
Explains rectification and the concept of voltage ripple.
Steps for soldering diodes and the load resistor.
Tests diode functionality by measuring resistance in both directions.
Diagram showing diode lead identification (anode/cathode).
Measures ripple voltage without a filter circuit.
Explains how a capacitor filter smooths DC voltage pulsations.
Steps for soldering the filter capacitor (C1).
Measures ripple voltage of the filtered DC output.
Using an oscilloscope to visualize rectification and filtering.
Explains how transistor Q1 and potentiometer R1 control output voltage.
Steps for connecting transistor Q1, bias resistor R2, and other components.
Tests the variable output voltage control of the power supply.
Table for recording output voltage (Vo) and transistor voltage (Vce).
Steps for mounting potentiometer, terminal posts, and transistor Q1.
Illustration of connecting wires to terminal strip lugs.
Steps for setting potentiometer to MIN and connecting voltmeter.
Steps for rotating potentiometer and checking voltage range.
Confirms the completion of the power supply testing procedure.
Steps for attaching the front panel and control knob to the cabinet.
Confirms the completion of the cabinet assembly.
Steps for using the power supply with electronic devices and monitoring output.
Warning about short circuits and incorrect connections.
Explains the function of transformer T1 in stepping down voltage.
Describes how diodes CR1 and CR2 change AC to pulsating DC.
Explains the role of capacitors and resistor in smoothing DC.
Details the function of the zener diode, resistor, capacitor, and transistor.
Statements to be marked as true or false regarding project principles.
Matching schematic symbols to their component names.
Fill-in-the-blank questions about transistor leads and voltage measurements.
A chart to aid in locating and diagnosing problems with the unit.
Instructions for requesting and ordering replacement parts.
Guidance for obtaining technical assistance and factory repair.
Note on eligibility for service regarding solder and modifications.
Instruction to cut out the breadboard schematic for Phase I.
The breadboard schematic diagram to be cut out for Phase I.
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