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4A Buck Boost Converter Module Adjustable Step Down with LCD Display Power (HW-140)

Buy 4A Buck-Boost Power Supply Module with LCD Display from CircuitHub – the best electronics store in Pakistan. Adjustable voltage and current for power supply and DIY projects.

PKR 2,080

Price includes GST · Cash on delivery available

Delivery & payment

2–3 hour delivery in Rawalpindi & Islamabad

Nationwide delivery in 1–3 days · PKR 250 flat, free over PKR 10,000

Genuine parts · 7-day check warranty · tested before dispatch

Cash on Delivery available nationwide

Key specifications

About this product

4A Buck-boost power supply module includes two main control buttons – IN/OUT and ON/OFF:

IN/OUT Button: Switches between input and output voltage display. Long press to view output current and power.
ON/OFF Button: Controls the output state. Long press to set the default power-on status (ON or OFF).

CC (Constant Current) and CV (Constant Voltage)

The CC potentiometer adjusts the output current. Turn clockwise to increase current. When load current reaches the set limit, the module enters constant current mode, and the red CC indicator lights up.
The CV potentiometer adjusts the output voltage. Turn clockwise to increase voltage. The ON indicator shows when output voltage is active.

How to Use?

Step 1: Use as a standard buck-boost module with overcurrent protection.
Step 2: Adjust the CV (voltage) to your desired output voltage.
Step 3: Use a multimeter (10A range) to measure short-circuit current. Adjust CC to set the desired overcurrent protection limit.
Note: A small voltage drop (0–0.2V) may occur due to the output resistor and wire resistance during high current usage. This is normal.