This is a 5V 4-Channel Relay interface board, be able to control various appliances, and other equipment’s with large current. It can be controlled directly by Micro-controller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
Operating Voltage: 5V DC, Channel: 4 channel, Relay Output Max.: AC250V 10A or DC 30V 10A, Input: Active Low,.

This is a 5V 8-Channel Relay interface board, be able to control various appliances, and other equipment’s with large current. It can be controlled directly by Micro-controller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
Operating Voltage: 5V DC, Channel: 8 channel, Relay Output Max.: AC250V 10A or DC 30V 10A..

This is a 5V 1-Channel Relay interface board, be able to control various appliances, and other equipment’s with large current. It can be controlled directly by Micro-controller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
Operating Voltage: 5V DC, Channel: 1 channel, Relay Output Max.: AC250V 10A or DC 30V 10A..

Specification:

1. The adjustable output voltage range of 1.25V-37V continuously adjustable
2. Input voltage 4.0-40V (input voltage to the output voltage must be higher than 1.5v.)
3. The maximum output normal and stable operating current up to 2A
4. Touch the key to switch measuring input or output voltage, and has a light show which is being measured voltages
5. Press the touch button for 3 seconds to turn off LED display, touch the button again to turn on the LED display .

This dual bidirectional motor driver is based on the very popular L298 Dual H-Bridge Motor Driver Integrated Circuit. The circuit will allow you to easily and independently control two motors of up to 2A each in both directions..

LM317 DC-DC 1.5A 1.2-37V Adjustable Power Supply Board, DC Converter Buck Step Down Module Adjustable Linear Voltage Regulator
Adjustable Output Voltage Range: 1.2 to 37V, Output Current: 1.5A Max., Input Voltage: 4.2 to 40 V, Module size: 35mm (L) x 17mm (W) x 24mm (H).

Input voltage: 4.5-35V, Output voltage: 1.5-35V (Adjustable), Output current: Rated current is 2A.

Features:
Conversion Efficiency: Up to 92% (output voltage higher, the higher the efficiency)
Module Properties: Non-isolated step-down module (buck)
Short Circuit Protection: Current limiting, since the recovery
Load Regulation: ± 0.5%, Voltage Regulation: ± 2.5%.