switching week1 to be a 555 timer project, h-bridge moves to week 2

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OddlyTimbot committed 2025-04-22 13:31:54 -04:00
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@@ -48,37 +48,3 @@ Passive components cannot amplify or generate power. They only **respond to** th
![Passive Components](./passive_components_symbols.png)
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# 🔌 N-Channel MOSFET: Overview
An **N-channel MOSFET** (Metal-Oxide-Semiconductor Field-Effect Transistor) is a type of transistor that controls current flow using an electric field — it's a three-terminal device with:
- **Gate (G)** — controls the transistor
- **Drain (D)** — where current flows **into**
- **Source (S)** — where current flows **out of**
When a positive voltage is applied to the **gate** relative to the **source**, the MOSFET turns **on**, allowing current to flow from **drain to source** (D → S).
## ⚙️ Common Uses
- Power switching in motor drivers
- Voltage regulation
- Signal modulation
- Digital logic switching
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# 🔁 Use in an H-Bridge Motor Controller
An **H-bridge** is a circuit used to control the **direction** of a DC motor. It consists of **four switches**, typically implemented with N-channel MOSFETs:
## H-Bridge Configuration:
![H-Bridge Circuit](./n_channel_h-bridge_motorcontrol.png)
- **Q1 + Q4 ON** → motor spins in one direction
- **Q2 + Q3 ON** → motor spins in the opposite direction
- **PWM control** on low-side N-MOSFETs allows speed control
Because N-channel MOSFETs conduct easily when their **gate voltage is higher than the source**, they're ideal for **low-side switching**. High-side use may require **gate driver circuits** to boost voltage.
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