FYI
2007-01-28, 07:55 AM
外接電池 / 可攜式 USB 充電器 Minty Boost! - USB charger for your gadgets (http://ladyada.net/make/mintyboost/index.html) (請先瀏覽Process, 再瀏覽Make)
小弟是在搜尋RS232 準位轉換IC 的時候, 無意間看到這個網頁, 內容解釋得非常詳細, 非常具有教育意義, 雖然比較適合學習電子的網友閱讀, 不過內容深入淺出, 圖片豐富, 只要具有基本電學常識就有辦法看得懂, 非常適合喜歡DIY 的網友, 小弟也找出一些相關資訊, 以供參考, 如果您覺得困難的話, 由Ｙ拍搜尋 "外接 電池" 就可以找到關產品, 價格從數佰元到兩千元不等
~ ladyada's tea party ~ :: View topic - fixing 'not charging' with mini/nano2G (and possibly others) (http://www.ladyada.net/forums/viewtopic.php?t=2851)
~ ladyada's tea party ~ :: View topic - Why pull up on D minus? (http://www.ladyada.net/forums/viewtopic.php?t=2058)
小弟認為如果要讓USB 充電器假冒Low Speed Device (100mA), 則應該以1.5K ohms 電阻連接D- 和+3.3V 才對, 而不是ladyada 所建議的10K ohms 電阻, 不過如果時間超過3ms 以上沒有訊號的話, 則USB Device 會進入暫停模式, 這可能是最根本的問題(keep alive)
~ ladyada's tea party ~ :: View topic - MintyBoost 1A ? (http://www.ladyada.net/forums/viewtopic.php?t=1524)
有時候電流太小根本無法充電, 而MAX756 的電流上限是300mA, 因此MAX608 可能比較適合
USB in a NutShell - Chapter 2 - Hardware (http://www.beyondlogic.org/usbnutshell/usb2.htm)
MAX756, MAX757 3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1167)
MAX1674, MAX1675, MAX1676 High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1878)
MAX608 5V or Adjustable, Low-Voltage, Step-Up DC-DC Controller (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1252)
MAX1700, MAX1701 1 Cell to 3 Cell, High-Power 1A, Low-Noise, Step-Up DC-DC Converters (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1830)
Charging Batteries from USB - Maxim/Dallas (http://www.maxim-ic.com/appnotes.cfm/an_pk/3607)
Power-Boost Circuit Powers Cellular Handset - Maxim/Dallas (http://www.maxim-ic.com/appnotes.cfm/appnote_number/1177)
Step-Up/Step-Down Converter Generates 3.3V From Two Or Three Cells - Maxim/Dallas (http://www.maxim-ic.com/appnotes.cfm/appnote_number/1025)
Digi-Key公司-臺灣 (http://tw.digikey.com)
小弟是在搜尋RS232 準位轉換IC 的時候, 無意間看到這個網頁, 內容解釋得非常詳細, 非常具有教育意義, 雖然比較適合學習電子的網友閱讀, 不過內容深入淺出, 圖片豐富, 只要具有基本電學常識就有辦法看得懂, 非常適合喜歡DIY 的網友, 小弟也找出一些相關資訊, 以供參考, 如果您覺得困難的話, 由Ｙ拍搜尋 "外接 電池" 就可以找到關產品, 價格從數佰元到兩千元不等
~ ladyada's tea party ~ :: View topic - fixing 'not charging' with mini/nano2G (and possibly others) (http://www.ladyada.net/forums/viewtopic.php?t=2851)
~ ladyada's tea party ~ :: View topic - Why pull up on D minus? (http://www.ladyada.net/forums/viewtopic.php?t=2058)
小弟認為如果要讓USB 充電器假冒Low Speed Device (100mA), 則應該以1.5K ohms 電阻連接D- 和+3.3V 才對, 而不是ladyada 所建議的10K ohms 電阻, 不過如果時間超過3ms 以上沒有訊號的話, 則USB Device 會進入暫停模式, 這可能是最根本的問題(keep alive)
~ ladyada's tea party ~ :: View topic - MintyBoost 1A ? (http://www.ladyada.net/forums/viewtopic.php?t=1524)
有時候電流太小根本無法充電, 而MAX756 的電流上限是300mA, 因此MAX608 可能比較適合
USB in a NutShell - Chapter 2 - Hardware (http://www.beyondlogic.org/usbnutshell/usb2.htm)
MAX756, MAX757 3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1167)
MAX1674, MAX1675, MAX1676 High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1878)
MAX608 5V or Adjustable, Low-Voltage, Step-Up DC-DC Controller (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1252)
MAX1700, MAX1701 1 Cell to 3 Cell, High-Power 1A, Low-Noise, Step-Up DC-DC Converters (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1830)
Charging Batteries from USB - Maxim/Dallas (http://www.maxim-ic.com/appnotes.cfm/an_pk/3607)
Power-Boost Circuit Powers Cellular Handset - Maxim/Dallas (http://www.maxim-ic.com/appnotes.cfm/appnote_number/1177)
Step-Up/Step-Down Converter Generates 3.3V From Two Or Three Cells - Maxim/Dallas (http://www.maxim-ic.com/appnotes.cfm/appnote_number/1025)
Digi-Key公司-臺灣 (http://tw.digikey.com)