創新的連接：Digi-Key氣象中心智能充電器

　　價格Digi-Key的氣象中心利用最好的電子元件的測試環境中，條件變化條件大大。下面的圖表描述了過程，Digi-Key的氣象中心傳送數據到電腦和移動設備。

　　本文重點介紹了智能充電器技術，利用替代能源，使電力和數據收集。和關于天氣中心設計收集到的信息可以在eewiki.net，通過Digi-Key公司贊助。

　　設計利用替代能源，如太陽能電池板和風力渦輪機的一種密封式鉛酸電池充電，智能充電器是基于ATMEL公司的AVR mega1281。這是在向Digi-Key氣象中心的設計來監控和控制充電電路的輸入能量的心。圖1a顯示了智能充電器系統及其功能的框圖。圖1b是安裝在氣象中心之前的智能充電器的圖像。

　　Smart Charger circuits

　　The two alternative energy sources are connected to two separate， though similarly designed charging circuits. The charging circuits are based on the Texas Instruments‘ BQ24450， a linear-designed regulator which monitors the battery voltage with a voltage divider circuit. In conjunction with the charging IC， some additions to the solar charging circuit （Figure 2） have been made， including the Zetex ZXCT1010 to measure the current through a sense resistor， and a series of resistors arranged in a voltage divider configuration. These two modifications allow the controller to measure the input voltage and current from the solar panels. Secondly， five IPS6031 high side switches from International Rectifier were added to allow the controller to connect or disconnect various inputs in and out of the circuit for a couple of different reasons. The first reason is to control the solar inputs individually in order to get maximum solar power， and the second reason is to allow testing of each solar panel individually for maximum life and performance. Lastly， five Ultra capacitors from NESSCAP were added to the input of the circuit to allow intermittent solar inputs to have a minimal effect on the charging of the battery.