Powered via USB or DC barrel jack, this module includes an onboard AMS1117 voltage regulator, power switches, and indicator LEDs for easy operation. Whether you are working with Arduino, ESP, Raspberry Pi peripherals, or general circuit prototyping, this module provides a stable and reliable power source for all your development needs.

Key Features

• Dual output options: 5V and 3.3V

• Independent voltage selection for each breadboard rail

• Compatible with 830-point and mini breadboards

• USB input or DC barrel jack (6.5V–12V)

• Onboard power switch

• AMS1117 voltage regulator

• Built-in power indicator LED

• Over-current and thermal protection (regulator dependent)

• Plug-and-play design for fast prototyping

Specifications

Key Features

• High-voltage capability: up to 1000V

• Forward current: 1A continuous

• Low leakage current

• Fast switching for rectification

• Robust and reliable for general-purpose use

Variants

• Standard 1N4007 Diode (axial lead)

• 1N4007 SMD version for PCB assembly

Specifications

Applications

• AC to DC rectification

• Power supply protection

• Polarity protection

• Electronics DIY projects

• General-purpose electronics circuits

Compatible Boards / Circuits

• Arduino / ESP32 circuits (for polarity protection)

• Power supply rectifier modules

• Embedded electronics projects

• Robotics and automation power circuits

Operating between 4.5V and 16V, the NE555 is compatible with a wide range of microcontroller and analog circuits. It delivers high output current (up to 200mA), allowing direct driving of LEDs, small relays, and buzzer modules without additional transistors.

Ideal for students, hobbyists, engineers, and anyone building timing or waveform-generator circuits.

Key Features:

• Classic 555 timer IC (NE555)

• Operates from 4.5V to 16V

• Up to 200mA output current

• Works in monostable, astable & bistable modes

• Adjustable frequency and duty cycle

• Stable and accurate timing

• Ideal for oscillators, delays, PWM & clock pulses

The chip features integrated flyback diodes, allowing safe operation with inductive loads such as relays and motors without needing additional protection components. The ULN2803A accepts both 3.3V and 5V logic, making it widely compatible across microcontroller platforms.

Common applications include relay driving circuits, stepper motor control, LED displays, home automation, robotics, vending machines, and industrial automation.

Key Features:

• 8-channel NPN Darlington transistor array

• Up to 500mA per channel

• Supports load voltages up to 50V

• Built-in flyback diodes for inductive loads

• TTL/CMOS compatible inputs

• Ideal for relays, motors, LEDs, solenoids, and displays

• Direct companion to shift registers like 74HC595

Each channel can source up to 500mA peak current, allowing safe control of demanding loads. The chip includes built-in clamp diodes for switching inductive loads, reducing the need for external protection circuitry.

Unlike typical low-side drivers like ULN2803, the UDN2981 is a high-side driver, meaning it switches the positive voltage line — ideal for powering common-cathode LED matrices and displays.

Key Features:

• 8-channel high-side driver

• Handles up to 50V output

• Up to 500mA peak current per channel

• Built-in output clamp diodes for inductive loads

• Compatible with TTL and CMOS logic

• Perfect for LED matrices, displays, relays, solenoids, and high-voltage loads

• Drop-in alternative: TD62783, MIC2981

This module outputs a sine-wave signal centered around a DC bias, making it easy to interface with analog-to-digital converters (ADC). The onboard potentiometer allows you to adjust the output amplitude without affecting the signal’s center value, giving flexible calibration for your application.

It is widely used in energy meters, power monitoring, smart home systems, voltage protection circuits, IoT data logging, and custom AC measurement projects.

Key Features:

• Voltage Measurement Range: AC 0–250V

• Voltage Transformer: Precision ZMPT101B

• Output Signal: Sine wave (biased around mid-point DC level)

• Sampling Circuit: High-precision op-amp with compensation

• Supply Voltage: 5V–30V

• Adjustable Sensitivity: Onboard multiturn potentiometer

• Output waveform amplitude adjustable without shifting center value

• Filtering Option: Add a capacitor (~105pF) at OUT to remove DC bias

• PCB Dimensions: 49.5 × 19.4 mm

Applications:

• AC mains voltage monitoring

• Smart energy meters

• IoT home automation systems

• Over/under-voltage protection circuits

• Real-time energy monitoring

• Power quality analysis

• Industrial automation