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本电路图所用到的元器件: C1815 PPN2222A LLS7220 TC4001BE ......
The given circuit, when connected in parallel to a telephone, dis- plays the number dialled from the telephone......
Light emitting diodes are advan- tageous due to their smaller size, low current consumption and catchy colours......
It is very interesting and convenient to be able to control everything while sitting at your PC terminal. Here......