New skill for building legacy hardware cicuit mockups

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# Common Breadboard Electronic Components
A practical reference for **breadboard-based electronics**, covering common components, formulas, tables, pinouts, and learning references. Suitable for beginners through intermediate hardware builders.
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## 1. Resistors
### Description
Resistors limit current, divide voltage, and set bias points.
### Common Types
| Type | Notes | Typical Use |
| ------------- | ----------- | ------------------ |
| Carbon Film | Cheap, ±5% | General purpose |
| Metal Film | Stable, ±1% | Precision circuits |
| Wirewound | High power | Power dissipation |
| Potentiometer | Adjustable | Volume, tuning |
### Standard Values (E12 Series)
`10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82 x 10^n`
### Color Code
| Band | Meaning |
| ---- | ------------ |
| 1 | First digit |
| 2 | Second digit |
| 3 | Multiplier |
| 4 | Tolerance |
### Power Ratings
| Rating | Typical Size |
| ------ | ------------------- |
| 1/8 W | Small |
| 1/4 W | Breadboard standard |
| 1/2 W | Large |
### Formulas
* **Ohm's Law:** `V = I x R`
* **Power:** `P = V × I = I² × R = V² / R`
### Reference
* [https://en.wikipedia.org/wiki/Resistor](https://en.wikipedia.org/wiki/Resistor)
---
## 2. Capacitors
### Description
Capacitors store electrical energy and block DC while passing AC.
### Common Types
| Type | Polarized | Typical Use |
| ------------ | --------- | ------------------ |
| Ceramic | No | Decoupling, bypass |
| Electrolytic | Yes | Bulk filtering |
| Tantalum | Yes | Compact filtering |
| Film | No | Signal coupling |
### Common Values
| Range | Example |
| ----- | ---------------- |
| pF | 10pF, 100pF |
| nF | 100nF (0.1µF) |
| µF | 1µF, 10µF, 100µF |
### Voltage Rating Rule
> Capacitor voltage rating ≥ **2x circuit voltage**
### Formulas
* **Capacitive Reactance:** `Xc = 1 / (2πfC)`
* **Energy Stored:** `E = ½ C V²`
### Reference
* [https://en.wikipedia.org/wiki/Capacitor](https://en.wikipedia.org/wiki/Capacitor)
---
## 3. Inductors
### Description
Inductors store energy in a magnetic field and resist changes in current.
### Common Types
| Type | Use |
| ------------ | ----------------- |
| Air-core | RF circuits |
| Ferrite-core | Power filtering |
| Choke | Noise suppression |
### Formula
* **Inductive Reactance:** `XL = 2πfL`
### Reference
* [https://en.wikipedia.org/wiki/Inductor](https://en.wikipedia.org/wiki/Inductor)
---
## 4. Diodes
### Description
Diodes allow current flow in one direction only.
### Common Types
| Type | Typical Part | Use |
| --------- | ------------ | --------------------- |
| Rectifier | 1N4007 | Power |
| Signal | 1N4148 | Logic, fast switching |
| Zener | 1N4733A | Voltage regulation |
| Schottky | 1N5819 | Low drop |
### Key Parameters
| Parameter | Typical |
| --------------- | -------------------------- |
| Forward Voltage | 0.7V (Si), 0.3V (Schottky) |
| Reverse Voltage | Device-specific |
### Reference
* [https://en.wikipedia.org/wiki/Diode](https://en.wikipedia.org/wiki/Diode)
---
## 5. LEDs (Light Emitting Diodes)
### Description
LEDs emit light when forward biased.
### Typical Forward Voltage
| Color | Vf |
| ----- | -------- |
| Red | 1.8-2.2V |
| Green | 2.0-3.0V |
| Blue | 3.0-3.3V |
### Current Limiting Resistor
`R = (V_supply - V_LED) / I_LED`
### Reference
* [https://en.wikipedia.org/wiki/Light-emitting_diode](https://en.wikipedia.org/wiki/Light-emitting_diode)
---
## 6. Transistors
### BJT (Bipolar Junction Transistor)
| Type | Example | Use |
| ---- | ------- | ------------------------ |
| NPN | 2N3904 | Switching, amplification |
| PNP | 2N3906 | High-side switching |
**Key Formula:**
* `Ic ≈ β × Ib`
### MOSFET
| Type | Example | Use |
| --------- | ------- | --------------------- |
| N-channel | IRLZ44N | Logic-level switching |
| P-channel | IRF9540 | High-side control |
### Reference
* [https://en.wikipedia.org/wiki/Transistor](https://en.wikipedia.org/wiki/Transistor)
---
## 7. Integrated Circuits (DIP)
### Common Logic Families
| Family | Voltage | Notes |
| ----------- | ------- | ------------------- |
| TTL (74LS) | 5V | Legacy |
| CMOS (74HC) | 2-6V | Breadboard-friendly |
### Decoupling Rule
> Place **0.1µF ceramic capacitor** across Vcc and GND per IC
### Reference
* [https://en.wikipedia.org/wiki/Integrated_circuit](https://en.wikipedia.org/wiki/Integrated_circuit)
---
## 8. Switches & Buttons
| Type | Use |
| ------- | --------------- |
| Tactile | Momentary input |
| Slide | Mode select |
| Toggle | Power |
### Debounce (RC Approximation)
* Typical: `10kΩ + 100nF`
---
## 9. Breadboards
### Description
Solderless prototyping boards with internal bus connections.
### Internal Wiring
* Rows: connected horizontally (5 holes)
* Rails: connected vertically (power)
### Limitations
* Not suitable for high-frequency or high-current circuits
### Reference
* [https://en.wikipedia.org/wiki/Breadboard](https://en.wikipedia.org/wiki/Breadboard)
---
## 10. Common Accessories
| Item | Purpose |
| ---------------- | ----------------- |
| Jumper wires | Connections |
| USB power module | 5V / 3.3V supply |
| Multimeter | Measurement |
| Logic probe | Digital debugging |
---
## 11. Quick Reference Formulas
| Formula | Description |
| --------------- | -------------------- |
| `V = IR` | Ohm's Law |
| `P = VI` | Power |
| `Xc = 1/(2πfC)` | Capacitive reactance |
| `XL = 2πfL` | Inductive reactance |
| `E = ½CV²` | Capacitor energy |
---
## 12. Learning Resources
* [https://learn.sparkfun.com](https://learn.sparkfun.com)
* [https://www.allaboutcircuits.com](https://www.allaboutcircuits.com)
* [https://www.electronics-tutorials.ws](https://www.electronics-tutorials.ws)
* [https://en.wikipedia.org/wiki/Electronics](https://en.wikipedia.org/wiki/Electronics)
---
**Document Purpose:** Practical breadboard electronics reference
**Scope:** Hobbyist, education, prototyping