MP2315/MP2225

Introduction: Universal module circuit suitable for mp2225, 2315

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Low cost and simple step-down current limiting/constant current charging

Introduction: This solution is based on Hengcheng Micro’s HC8002/8003 chip. The output voltage/current is adjustable, the input is 7-32V, the output of 8002 is up to 2.8A, and the output of 8003 is up to 3.6A.

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[Internet of Things] Hongmeng Smart WIFI Switch

Introduction: IoT smart switch based on Hongmeng operating system

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485 communication protocol-RGB light strip controller

Introduction: RGB light strip controller with 485 communication, maximum current 30A, single channel about 10A, MOS tube can be replaced to increase the current.

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12V-150V boost Conv

Introduction: Achieve 12V boost to 150V@100mA through UC3843. The inductor uses a 166125 iron silicon aluminum magnetic ring, with 18 turns of 22uH in the primary and 72 turns in the secondary. 0.3mm winding.

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DIY direct drive simulator steering wheel MMOS H-bridge drive isolation conversion version

Introduction: Based on the open source Riding isolation board developed by pkintel, the leader of station B, modified according to my own experience of using it.

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AD620 weighing amplifier

Introduction: AD620 weighing pedal signal amplifier used with MMOS firmware

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ICL7660 charge pump negative voltage voltage inversion module

Introduction: ICL7660 charge pump negative voltage voltage inversion module. Generates -1.5~-12V voltage from 1.5~12V voltage. Output current ≤55mA

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2-5V dropped to 3.3V

Introduction: BL9198 step-down chip

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pcie boot card pure power supply extension cable

Introduction: PCI-powered boot card dedicated power supply adapter cable. You can move the PCIe slot where the graphics card is pressed to an open area to install the boot card.

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SnailHeater_Public

Introduction: Multifunctional soldering station, referred to as "snail station". Flat heating table, air gun, T12/C245 soldering iron, adjustable power supply with multiple controls. This project is developed using the ESP32S2 module. This project will continue to be optimized and will not be done halfway.

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VPS8703 test board

Introduction: VPS8703 is a domestic micropower full-bridge topology isolated power driver chip with simple peripheral circuits and can expand the voltage stabilization function.

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7-way remote control relay module

Introduction: Use two 315MHz remote controls to control this relay module. It can be used in various scenarios that require simultaneous control of two channels. The power supply is 8-30v.

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Primary battery test

Introduction: Make a primary battery pack and light up an LED

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Withstand voltage meter/high voltage megger/transistor withstand voltage tester

Introduction: This is a dual-purpose instrument that can measure withstand voltage and insulation.

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4-position independent 18650 charger

Introduction: 4 independent current optional chargers

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LED high power multi-function dcdc constant current step-down module

Introduction: A LEDdcdc step-down module with constant current. The main control is Yuxin’s yx6623. The input voltage is 2.5~24v, the maximum constant current is 2.5a, and there are three functional outputs.

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TX4139 4.5V-75V

Introduction: The output voltage of this module is adjustable, the input voltage is up to 75V, the output current is 2A, and the output ripple is 60mv.

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MP1584 3A

Introduction: Power module using MP1584 chip, input voltage 28V, output current 3A, 1.5MHz working frequency, output ripple 60mV

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Low-cost Bluetooth code scanning payment module

Introduction: Use the Bluetooth scan code payment module of Pay Now, which is used in: scan code payment socket, washing machine scan code payment, various amusement vehicles scan code payment, various engineering vehicles scan code payment, mahjong machine scan code payment, air purifier Scan the QR code to pay, scan the QR code to pay for massage chairs, etc.

Schematic PCB