It all started rather innocuously. I walked into Dr GT Murthy’s office one fine day, andchanged my life. “Doc” was then the General Manager, Central R&D, of a very largeelectrical company headquartered in Bombay. In his new state-of-the-art electronics center,he had hand-picked some of India’s best engineers (over a hundred already) ever assembledunder one roof. Luckily, he too was originally a Physicist, and that certainly helped me gainsome empathy. Nowadays he is in retirement, but I will always remember him as athoroughly fair, honest and facts-oriented person, who led by example. There were severalthings I absorbed from him that are very much part of my basic engineering persona today.You can certainly look upon this book as an extension of what Doc started many years agoin India … because that’s what it really is! I certainly wouldn’t be here today if I hadn’t metDoc. And in fact, several of the brash, high-flying managers I’ve met in recent years,desperately need some sort of crash course in technology and human values from Doc!
MAX30102芯片心率血氧傳感器模塊傳感器模塊軟硬件設(shè)計資料包括STM32測試源碼AD設(shè)計原理圖及心率及血氧參考設(shè)計資料:參考代碼及實驗數(shù)據(jù)工程文件及庫心率及血氧參考設(shè)計資料芯片數(shù)據(jù)手冊1771.pdf2ES Teck PEMS White Paper.pdf31930_accessories.pdf5273c08fe2b6b_1_4264142A_EN_p.pdfAvant 2120 Brochure.pdfcelyon-1057-daeg.pdfDr. Bob case study for dental.pdfenvitec.pdfgclarke-2015-MASc-thesis.pdfiadt02i4p261.pdfIHE_PCD_Suppl_POI.pdfijcsit2014050679.pdfIMECS2009_pp1537-1540.pdfLuksSwensonPulseOximetryatHighAltitude.pdfMI_CCHD_Screener_Tips_Flier_3-21-13_422078_7.pdfMoon.pdfnotes6.pdfpansw_spo2_sensor.pdfPK_EN_MAsimo2008Product Catalog.pdfpm-60a-spo2-report-4.pdfpulse-oximetry-at-home.pdfpulse-oximetry.pdfpulse.pdfPulseOxFinal_low.pdfpulse_ox.pdfpxc3976461.pdfReusable SpO2 Sensors.pdfSP02-cross-reference-sensor.pdfsprt533.pdfsszb140.pdfview.pdf
The PW3130 series product is a high integration solution for lithium-lion/polymer batteryprotection.PW3130 contains advanced power MOSFET, high-accuracy voltage detection circuits anddelay circuits. PW3130 is put into an ultra-small SOT23-5 package and only one external componentmakes it an ideal solution in limited space of battery pack. PW3130 has all the protection functionsrequired in the battery application including overcharging, overdischarging, overcurrent and loadshort circuiting protection etc. The accurate overcharging detection voltage ensures safe and fullutilization charging.The low standby current drains little current from the cell while in storage. Thedevice is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Polybattery-powered information appliances requiring long-term battery life
The PW2053 is a high-efficiency monolithic synchronous buck regulator using a constantfrequency, current mode architecture. The device is available in an adjustable version. Supply currentwith no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makesthe PW2053 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provideslow dropout operation, extending battery life in portable systems. PWM/PFM mode operationprovides very low output ripple voltage for noise sensitive applications. Switching frequency isinternally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. Lowoutput voltages are easily supported with the 0.6V feedback reference voltage
以AT89S52單片機為控制核心,采用電容降壓技術(shù),Buck電路拓撲,PWM驅(qū)動模塊和功率器件散熱設(shè)計,通過高速的數(shù)據(jù)采集、主功率輸入輸出模塊和控制模塊,設(shè)計一種新型智能車載充電器.在充電過程中,通過負脈沖瞬間放電實現(xiàn)對鉛酸蓄電池的再生修復(fù),提高電池的有效容量,延長使用壽命.該充電器體積小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data acquisition,main power input and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good reliability.
鋰電池BMS管理技術(shù)是移動機器人的關(guān)鍵技術(shù),本文設(shè)計了基于bq76PL455、STM32F103的鋰電池管理系統(tǒng),實現(xiàn)了電池組電壓、電流、過壓、過流等狀態(tài)監(jiān)測;系統(tǒng)配置均衡電路,電池充電過程中若出現(xiàn)電池單體電壓不平衡現(xiàn)象,會觸發(fā)均衡電路,進而提高電池的安全性,延長使用壽命。Lithium battery BMS management technology is the key technology of mobile robot.The lithium battery management system based on bq76PL455 and STM32F103 is proposed to realize the monitoring of battery pack voltage,current,overvoltage and overcurrent.The system is equipped with equalization circuit.When the battery cell voltage imbalance occurs,the equalization circuit is triggered to improve the safety and service life of the battery.
隨著電磁閥在工業(yè)和日常應(yīng)用的增多,其功耗越來越被人們所重視。通過對電磁閥驅(qū)動電路的研究,設(shè)計一套電磁閥節(jié)能驅(qū)動電路。不僅提高了電磁閥的響應(yīng)時間,更重要的是降低了功耗,使電磁閥由工作在大電流狀態(tài)下,變成大電流啟動小電流維持的工作狀態(tài)。減少了由電流過大引起的電磁閥線圈過熱,增加了電磁閥的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to start with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
