PSPexpA1

数控直流电源，通过4*4按键输入所需电压，PWM调节BUCK电路的开关管的导通时间调节到你所需的电压(NC DC power supply via 4* 4 keypad enter the desired voltage, PWM BUCK regulator circuit switch conduction time adjusting to your desired voltage)

此代码为基于51单片机的超声波测距程序，内含LCD12864显示程序，可实时显示距离。(This code is based on 51 microcontroller ultrasonic ranging program, containing LCD12864 display program can display distance in real time.)

ADXL345 加速度计 用户手册 中文资料(ADXL345 accelerometer User Manual Chinese data)

SILABS新推出SI4463完整DEMO板原理图、PCB图、DEMO程序下载。传输距离1000~2000米 SILABS新推出EZradioPRO系列RFIC:SI4432,适合长远距离的无线数据传输应用.其发射功率+20dbm,接收灵敏度-116dbm,通讯距离2000米 SI4463特点 频率范围= 119–1050 MHz 接收灵敏度 = –126 dBm 调频模式 (G)FSK and 4(G)FSK OOK and ASK 最大输出功率 +20 dBm (Si4464/63) +16 dBm (Si4461) +13 dBm (Si4460) PA支持 +27 dBm 低功耗 10/13 mA RX 19 mA TX at +10 dBm (Si4460) 待机模式 30 nA shutdown, 50 nA standby 波特率= 0.123 kbps to 1Mbps 快速唤醒转换时间 支持电压= 1.8 to 3.6 V Excellent selectivity performance 60 dB adjacent channel > 73 dB blocking at 1 MHz 天线多样性和T / R开关控制 高度可配置的包处理程序 TX and RX 64 byte FIFOs 自动频选(AFC) 自动增益控制 (AGC) 低成本 Low Battery Detector 温度传感器 20-pin QFN 封装 IEEE 802.15.4g compliant FCC Part 90 Mask D (SILABS new EZradioPRO series RFICs: SI4432, suitable for long-term distance wireless data transmission applications. Emission power+20dbm, receiver sensitivity-116dbm 2000 meters communication distance the SI4463 characteristics of the frequency range = 119-1050 MHz Receiving Sensitivity =-126 dBm FM mode ( G) FSK and 4 (G) FSK OOK and ASK the maximum output power+20 dBm (Si4464/63)+16 dBm, (Si4461)+13 dBm, (Si4460) PA to support+27 dBm low-power 10/13 mA RX 19 mA TX at+10 dBm (Si4460) 30 nA of the shutdown of the standby mode, 50 nA, the standby baud rate = 0.123 kbps to 1Mbps fast wake-up voltage conversion time support = 1.8 to 3.6 V Excellent selectivity Performance 60 dB adjacent channel> 73 dB, the blocking at 1 MHz antenna diversity and T/R switch control highly configurable packet handler TX and RX 64 byte FIFOs automatic frequency-selective (AFC) Automatic Gain Control (AGC) low-cost Low Battery Detector temperature sensor 20-pin QFN package IEEE 802.15.4g compliant FCC Par)

SIM900 firmware rferergegrgerg

485的msp430通讯,包括主机和从机的程序.多机通讯,例子是三个弹片机,可以扩展多个,硬件终端电阻要求120,(485 Controller communications, including mainframe and from the plane procedures. Multi-machine communication, shrapnel example is the three aircraft that can extend multiple hardware requirements terminal resistor 120,)

说明：   超声波测距基于8051的源程序设计(8051 Ultrasonic Ranging based on the source code design)

基于MSP430的LCD1602驱动程序，该程序只用到了4根传输线，里面有写好了的h文件和c文件，添加到工程即可运用。(Based on LCD1602 MSP430 driver, the program only to 4 root transmission line, and there are written the h files and c file, adding to the engineering can be used.)

51单片机串口实验，有proteus仿真原理图，一个发送，一个接收(51 microcontroller serial experiments, proteus simulation schematic, a sending, receiving)

The progress of the color gradient(The progress of The color gradient)