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电源技术 DN464 高效率USB电源管理系统
 
Automotive power systems are unforgiving electronicenvironments. Transients to 90V can occur when thenominal voltage range is 10V to 15V (ISO7637), along withbattery reversal in some cases. It’s fairly straightforwardto build automotive electronics around this system, butincreasingl ...
电源技术 超级电容器备用电源系统的手持设备数据保护
 
Handheld electronic devices play a key role in our everydaylives. Because dependability is paramount, handhelds arecarefully engineered with lightweight power sources forreliable use under normal conditions. But no amount ofcareful engineering can prevent the mistreatment theywill undergo ...
电源技术 利用高压看门狗定时器加强汽车安全系统
 
Abstract: As electronic systems take over many of the mechanical functions in a car—ranging from engine timing to steering andbraking—there is a growing concern about fault tolerance. There should not be a single point of failure that would prevent a car fromat least "limping" ...
电源技术 Wide-input dc/dc modules offer
When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typ ...
单片机编程 Microchip PIC系列单片机RS232通讯应用
Digitemp Junior – An RS-232 Port-Powered Digital Thermometer
Digitemp Jr. is a device that is designed to measure
and report ambient temperature. When connected to
an RS-232 port on any PC, it will periodically measure
and report in ASCII form the ambient temperature in
degrees Celsius ...
单片机编程 基于单片机的数字化B超键盘设计
针对目前使用的RS232接口数字化B超键盘存在PC主机启动时不能设置BIOS，提出一种PS2键盘的设计方法。基于W78E052D单片机，采用8通道串行A/D转换器设计了8个TGC电位器信息采集电路，电位器位置信息以键盘扫描码序列形式发送，正交编码器信号通过XC9536XL转换为单片机可接收的中断信号，软件接收到中断信息后等效处理成按键。 ...
单片机编程 PIC单片机的RS232通讯程序
Digitemp Jr. is a device that is designed to measure
and report ambient temperature. When connected to
an RS-232 port on any PC, it will periodically measure
and report in ASCII form the ambient temperature in
degrees Celsius. These temperature readings can be
monitored with any terminal program. If ...
单片机编程 AVR32801: UC3A3 Schematic Chec
AVR32801: UC3A3 Schematic Checklist Features •  Power circuit •  Reset circuit •  USB connection •  External bus interface •  ABDAC sound DAC interface •  JTAG and Nexus debug ports •  Clocks and crystal oscillators • ...
单片机编程 基于AT89S52的机载电气盒测试仪的设计
飞机电网故障时，机载电气盒必须在延迟时间内切断电网，保护机载设备。采用AT89S52设计的电气盒测试仪能够测试电气盒保护功能，测量延迟时间。实际应用结果表明，该测试仪具有测量准确、可靠性高、成本低等优点。
Abstract:
 The helicopter-electrical-box must shut off the helicopter power，protect the equip ...
单片机编程 NXP P89LPC901单片机汽车起动保护控制器设计
在汽车发动机起动时，若发动机起动后起动机不能及时断电，将会烧毁起动机或损坏飞轮齿环；若变速器不在空档位置起动，则起动机的瞬间动力将使汽车位移，还可能引起交通事故和人身安全。为此介绍一种利用NXP P89LPC901单片机控制的汽车起动保护控制器，通过检测汽车起动开关、变速箱档位、发动机转速，实现对汽车发动机起动 ...