Servo-Stabilizer-with-Display

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Servo-Stabilizer-with-Display

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PIC16F886 Servo Stabilizer with LCD Menu System - Firmware for a voltage stabilizer built on PIC16F886 featuring an LCD-driven configuration menu. The system monitors input/output voltage via ADC, controls servo movement for regulation, and provides protection mechanisms with adjustable parameters.

// repository documentation

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# PIC16F886 Servo Voltage Stabilizer

This README file includes:

* Project overview
* Features
* Tech stack
* Menu system
* Protection & control logic
* Folder structure
* Build & usage notes

---

## PROJECT OVERVIEW

This project implements a **servo-based automatic voltage stabilizer** using the **PIC16F886 microcontroller** and an **LCD menu interface**.
The firmware continuously monitors input and output voltage through the ADC, regulates voltage via servo movement, and provides configurable protection mechanisms.

The system allows runtime parameter tuning directly from the LCD menu using push buttons.

---

## FEATURES

* Real-time input and output voltage monitoring
* Servo control for voltage regulation
* LCD-driven configuration menu
* Adjustable voltage thresholds
* High/low voltage protection
* Delay timers for stable operation
* Overload protection framework (CT)

---

## TECH STACK

* **Microcontroller:** PIC16F886
* **Language/Compiler:** Embedded C (CCS C style)
* **Display:** 16x2 Character LCD (4-bit mode)
* **Peripherals Used:**

* ADC (AN0, AN1, AN2)
  * GPIO for buttons & control
* **Control Mechanism:** Servo motor (via driver circuitry)

---

## MENU SYSTEM

The firmware includes an interactive LCD menu for configuring stabilizer behavior.

### Menu Options

1. **Output Voltage Set**
   Adjust target output voltage (225–240 V)

2. **Regulation Window**
   Defines acceptable ± regulation band

3. **CT Amps Set**
   Current transformer limit (overload threshold)

4. **Low Cutoff Voltage**
   Minimum allowed output voltage

5. **High Cutoff Voltage**
   Maximum allowed output voltage

6. **Switch-On Timer**
   Startup delay before enabling output

7. **High Voltage Delay Timer**
   Delay before high-voltage cutoff

8. **Low Voltage Delay Timer**
   Delay before low-voltage cutoff

9. **CT Delay Timer**
   Delay before overload cutoff

---

## PROTECTION & CONTROL LOGIC

### Voltage Monitoring

* ADC channels read input/output voltages
* ADC values converted to approximate voltage levels

### High / Low Voltage Protection

* If output voltage exceeds limits:

* Corresponding delay timer is applied
  * Voltage is rechecked
  * Output relay/control pin is disabled if fault persists

### Servo Regulation

* If voltage is below target → Increase correction
* If voltage is above target → Decrease correction
* Within regulation window → No movement

### Overload Protection (Optional)

* CT measurement logic present (currently commented)
* Designed to trip output when current exceeds threshold

---

## FOLDER STRUCTURE

```
project-root/
│── main.c              # PIC16F886 stabilizer firmware with LCD menu
│── lcd.c               # LCD driver (4-bit interface)
│── README.md           # Project documentation
```

*(Structure may vary depending on your IDE/project setup)*

---

## BUILD & FLASH NOTES

1. Compile using a CCS-compatible C compiler
2. Set clock frequency to **20 MHz (HS crystal)**
3. Flash the generated HEX file to PIC16F886
4. Ensure correct LCD and button wiring

---

## BASIC OPERATION

* LCD displays **VOLT IN** and **VOLT OUT** continuously
* Press and hold menu button to enter configuration
* Use increment/decrement buttons to modify values
* Values wrap within predefined limits

---

## HARDWARE ASSUMPTIONS

* Proper voltage sensing circuit connected to ADC pins
* Servo driver / motor control circuitry present
* Output control via relay or driver transistor
* Debounced push buttons connected to GPIO pins

---

## CONCLUSION

This firmware demonstrates a fully configurable **servo voltage stabilizer controller** with monitoring, protection, and user-friendly LCD interaction.

Servo-Stabilizer-with-Display

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