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Transformer_alarm
- 变压器防盗报警器源码、原理图和PCB(protel 2004).MCU是STC89C58RD+.变压器防盗报警装置是针对野外的基站低压变压器被盗现象严重而开发的一种智能防盗报警系统。该装置采用RS422/ RS485通信手段,传输稳定可靠,维护方便等特点。弥补了传统集群式系统功耗高,通信距离短,购买价格昂贵等缺点。该产品采用高集成度的单片机作为控制核心,具有功能强,体积小,运行可靠等特点。-Transformer burglar alarm.Sound code, schematic diagr
pcb-quoted-price_1.0
- PCB制版费用计算器,很好的PCB制作的成本计算工具.-PCB plate cost calculator, a good PCB production costing tools.
mini2440.pdf
- The MINI2440 is an effecient ARM9 development board with a comprehensive price, it characterizes simple method and high performance-price ratio. Based on the Samsung S3C2440 microprocessor, it embodies professional stable CPU core power source chip a
1220-netdvd-compairlist.pdf
- D-Link comparison of different units with EM8620 and price differences. Includes pictures of PCB/casing of each unit compared.