Shields & Expansion BoardsCode 46755f2c08

Micro USB Rechargeable Mini Circuit Board, 3-Level Speed Control 18650 Compatible

Name: Micro USB Rechargeable Mini Circuit Board, 3-Level Speed Control 18650 Compatible
SKU: 46755f2c08
Price: 40 PKR
Availability: InStock

Short description: Compact PWM dimmer for brushed DC motors and a controller for 3.7V single-cell battery charging - not a boost converter (no coil/inductor).

Rs 40

In stock Price updated 15 Nov 2026

Total: Rs 40

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Delivery in 2 to 4 working daysFree in Islamabad & Rawalpindi above Rs 5,000
Cash on deliveryPay when your parcel arrives
7-day checking warrantyDead-on-arrival items replaced
Packed with careAnti-static & padded packaging

Highlights

True PWM dimmer for brushed DC motors - smooth speed control when used with an appropriate MOSFET or switch.
Suitable for 3.7V single-cell battery charge-control with external current limiting and protection.
Not a boost converter - contains no coil/inductor; does not step up voltage.
Compact PCB for easy embedding in small projects and enclosures.
Simple integration - add current limiting, charge-termination, and protection circuitry for safe charging.
Do not expect voltage boost - use a proper boost converter to step up voltages.
Recommended for hobby/DIY projects; verify wiring and test with a reliable power source and protection equipment before deployment.

Specifications

Model: JMX-FN03-U1.2
Function: PWM motor dimmer & 3.7V charger controller
Target voltage: single-cell 3.7V (Li-ion / LiPo)
Topology: PWM switching (no coil / not a boost converter)
Form factor: compact PCB - verify dimensions before installation

About this product

The JMX-FN03-U1.2 is a compact PWM controller designed for motor speed control and simple 3.7V single-cell charge-control tasks. It outputs a pulse-width-modulated signal for smooth, efficient control of brushed DC motors and can be used in basic battery charging arrangements when paired with proper current limiting and protection. This board is not a boost converter - it contains no coil/inductor and will not raise voltage.

Key features

Technical summary

Usage notes & safety

•Intended for PWM control and basic charge-control - not a full-featured smart charger. Use current limiting and battery protection when charging.