Ding Xiaoxu et:Microcontroller-based mobile wireless charger design Microcontroller-based mobile wireless charger design Ding Xiaoxu,Guo Baifu;Like (Jilin Universiry of Instrument Science and Electrical Engineering.Changchun 130012) Abstracr-In order to adapt to the wireless charging of implantable medical devices,sensors,municipal transportation and ow-power principle of electromagnetic induction,through energy coupling coil,to achieve energy transfer,the current control,voltage contro achieve transmission distance 5cm.the voltage reaches 5V,0.5A current steady power supply,after the prompt is given full power and full automatically stop charging.Charging voltage and charging current display with low power LCD1602.System has a wireless charging,emergy transfer effect is good,low cost,no wiring,easy to carry and other dva s-STC12C5A60S2 MCU intelligent wireless charging distance can reach 5-10cm,voltage 5V,0.5A current FOREWORD stable charging.Has simple,wireless transmission PHONE needs the corresponding charger.most single chip microcomputer and LCD power chargers can not be universal and compatible portable consumption is more,lead to the problem of lower wired charger and charge the user is not easy.So a no charging current,so use low-power chips and liquid charger charging technology to be developed.Nokia crystal display,the charging current can be improved. 920 handset with a wireless charging technology I THE HARDWARE SYSTEM DESIGN receiving end have a coil,transmitter coil is connected wired power generating electromagnetic signals. The wireless charging system design using Receiver coil induction sending electromagnetic electromagnetic induction principle,the use of coil signals to generate current to the battery.But Nokia coupling to transfer energy.Due to the wireless 920 wireless charging.y you need to put the ssion of power voltage with energy sending corresponding wireless charging plate,on more thar unit and receiving unit coupling coil spacing D may 2 cm can not be charged,and the production process is change in the test.lead to different charging voltage complicated,expensive,visible increase the change of distance,design considerations for safety,so transmission distance is a wireless charging charging ways on the choice of constant voltage technology should pay attention to the issue.This scheme.On the device select select has design uses the same principle of electromagnetic variety of power saving mode.power consumptior induction to generate energy through the coil coupling province in particular,Strong anti-interference force of hardware circuits are transmitting and receiving ends MSP430 ultra-low power MCU series MSP430F2274 of two parts,transmitter using NE555 with the RC as monitoring of wireless transmission can charger oscillation circuit constituted,as a power amplifier control core chip,voltage and charging time display using FET devices;Receive omprised BUCK ith low power c onsumption LCD1602 LCD screer chopper circuit voltage type step-down DC/DC to improve the utilization efficiency of the energy of conversion circuit realized steady flow.Transmission the charging circuit.Ding Xiaoxu etc.: Microcontroller-based mobile wireless charger design 1 Microcontroller-based mobile wireless charger design Ding Xiaoxu; Guo Baifu; Like (Jilin University of Instrument Science and Electrical Engineering, Changchun 130012) Abstract—In order to adapt to the wireless charging of implantable medical devices, sensors, municipal transportation and other aspects of the application, Change the current electronic charging interface incompatibilities. The design uses a low-power microcontroller STC12C5A60S2 energy transfer charger as a wireless monitoring and control core，based on the principle of electromagnetic induction, through energy coupling coil, to achieve energy transfer, the current control, voltage control, achieve transmission distance 5cm, the voltage reaches 5V, 0.5A current steady power supply, after the prompt is given full power and full automatically stop charging。Charging voltage and charging current display with low power LCD1602.System has a wireless charging, energy transfer effect is good, low cost, no wiring, easy to carry and other advantages, has a broad application prospects. Keywords—STC12C5A60S2 MCU intelligent wireless charging FOREWORD PHONE needs the corresponding charger, most chargers can not be universal and compatible portable wired charger and charge the user is not easy. So a no charger charging technology to be developed. Nokia 920 handset with a wireless charging technology, using electromagnetic induction principle, sending and receiving end have a coil, transmitter coil is connected wired power generating electromagnetic signals, Receiver coil induction sending electromagnetic signals to generate current to the battery. But Nokia 920 wireless charging, you need to put the corresponding wireless charging plate, once more than 2 cm can not be charged, and the production process is complicated, expensive, visible increase the transmission distance is a wireless charging technology should pay attention to the issue. This design uses the same principle of electromagnetic induction to generate energy through the coil coupling, hardware circuits are transmitting and receiving ends of two parts, transmitter using NE555 with the RC oscillation circuit constituted, as a power amplifier using FET devices; Receive comprised BUCK chopper circuit voltage type step-down DC/DC conversion circuit realized steady flow. Transmission distance can reach 5-10cm, voltage 5V, 0.5A current stable charging. Has simple, wireless transmission distance is long, low-cost advantage. In the design of single chip microcomputer and LCD power consumption is more, lead to the problem of lower charging current, so use low-power chips and liquid crystal display, the charging current can be improved. 1 THE HARDWARE SYSTEM DESIGN The wireless charging system design using electromagnetic induction principle, the use of coil coupling to transfer energy. Due to the wireless transmission of power voltage with energy sending unit and receiving unit coupling coil spacing D may change in the test, lead to different charging voltage change of distance, design considerations for safety, so charging ways on the choice of constant voltage charging scheme. On the device select select has a variety of power saving mode, power consumption province in particular, Strong anti-interference force of MSP430 ultra-low power MCU series MSP430F2274 as monitoring of wireless transmission can charger control core chip, voltage and charging time display with low power consumption LCD1602 LCD screen, to improve the utilization efficiency of the energy of the charging circuit