PCBs

Overview

This repository contains the PCBs of plug base and the modules that can be used with this plug base such as a programmable timer, set timer, wireless switch, and Bluetooth module.

Project Structure

The repository is organized as follows:

• plug_base/: Contains PCB files of plug base that the various modules will connect to.
• timer_module/: Contains PCB files of reprogrammable timer module.
• set_timer_module/: Contains PCB files of set timer module.
• wireless_switch_module/: Contains PCB files of wireless switch module.
• bluetooth_module/: Contains PCB files of Bluetooth module.

Plug_Base

Components

• CD4041: CMOS quad NAND Schmitt trigger inverter, used likely as an inverter or buffer.
• Relay: Electromagnetic switch controlled by an electrical signal to open or close contacts.
• Resistors: 10kΩ and 100kΩ resistors to limit current flow.
• Capacitors: Used to store electrical energy (value not shown).
• Power Supply: Provides voltage of 3V and VCC.
• Module Connection (P2 and P3): Interfaces where the different modules plug into the base.

Timer_Module

Components

• CD4011BE: Quad NAND gate IC, likely used in the timer functionality.
• Resistors (R1 and R2): Limit current flow (values determine current).
• Capacitor (C1): Controls the timing interval by charging and discharging.
• Pulse Input: Trigger for the timer.
• Output (OUT): Controls a relay or switching device for the outlet.
• Status LED: Indicates the timer state (on or off).
• Trigger Input: Used to reset or start the timer.

Set_Timer_Module

Components

• IC1 (555 Timer): Functions as a voltage-controlled timer in a monostable configuration.
• Resistors (R1 and R2): Work with C1 to determine timer duration.
• Capacitor (C1): Sets the timer duration by controlling charge/discharge cycles.
• Push Button (SW1): Trigger to initiate the timer.
• LED1: Visual indicator of timer status.
• Output (OUT): Controls a relay or switching device for the outlet.

Wireless_Switch_Module

Components

• IC1 (CD4017BE): CMOS IC with decade counter/divider stages, used to decode wireless signals.
• Resistors (R1, R2, R3, R4): Limit current and set voltage levels.
• Capacitor (C1): Filters noise on the power supply line.
• Receiver (DI): Antenna or receiver circuit for the wireless signal.
• Output (OUT): Controls a relay or switching device for the outlet.
• Status LED: Indicates the receiver module state (on or off).

Bluetooth_Module

Components

• Microcontroller (U1): Controls the Bluetooth module and communicates with other devices.
• Crystal (Y1): Provides precise oscillating signal for synchronization.
• Resistors: Limit current, set voltage levels, and bias transistors.
• Capacitors: Filter power supply, store energy, and provide stability.
• Inductor (L1): Part of the matching circuit for the Bluetooth antenna.
• Bluetooth Antenna: Transmits and receives Bluetooth signals.
• Status LED: Indicates Bluetooth module state (powered on, connected, etc.).
• Connection Pins (PBO - P5): Connect the Bluetooth module to the main plug base unit.

Usage

Navigate to the Desired Module/PlugBase:

1. Plug Base
2. Reprogrammable Timer
3. Set Timer
4. Wireless Switch
5. Bluetooth module

Base and Moduels

Base
Wireless Module	Set Timer Module
Reprogrammable Timer Module	Bluetooth Module

Open the PCB Files:

Use Altium PCB design software to open files.