Parts

Table Of Contents

The Components area explains broad classes of devices. The Parts area gets specific: an exact part number, package, pinout, limits, and practical use.

Integrated Circuits and Optoelectronics
Specific devices used in LearnTronics projects and examples.

NE5534 — Single low-noise audio operational amplifier. Used in the µ-Amp guitar preamplifier.
OPA2134PA — Dual FET-input SoundPlus audio operational amplifier in an 8-pin PDIP package. Used for the six piezo-string buffer channels in the FJD guitar project.
PC817 — Four-pin LED-to-phototransistor optocoupler used in the FJD guitar power-switching section.

How LearnTronics Fits Together
Follow the subject from a general device, to a specific part, to a practical circuit.

Components — General: What is an op amp? What is a resistor? What does an optocoupler do?
Parts — Specific: What is an OPA2134PA? Which pin is V−? What supply range is allowed?
Projects — Application: How are those parts combined to make something useful?

Component → Part → Application. The same subject can be approached from any direction.

LearnTronics treats manufacturer data sheets as the authority for limits and specifications. Verify the exact manufacturer, suffix, package, and revision before substituting or building.