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骑自行车锻炼、郊游是许多人爱好的活动。于是各式各样的自行车里程计应运而生。但大部分设计都摆脱不了串行计数、译码、驱动的思路,电路极为复杂,使许多人望而却步。为此,笔者采用“简洁、实用”至上的原则,大胆设计了这一款超简洁、液晶数字显示自行车里程计。整机电路只需一个干簧管J、一块磁铁和一个计算器,其成本仅需几元钱。计程器工作原理:当计算器进行加法运算时,可进行累加运算。例如按“2”、“十”,再按“=”,显示“2”,重复按“=”,则每次累加“2”。利用此累加原理,从计算器
Cycling exercise, outing is a lot of people like activities. So a wide range of bicycle odometer came into being. However, most of the design can not get rid of the serial counting, decoding, driving ideas, the circuit is extremely complex, leaving many people discouraged. To this end, I use the “simple, practical” supremacy of the principle, bold design of this ultra-simple, LCD digital display bicycle odometer. The entire circuit requires only a reed switch J, a magnet and a calculator, which cost a few dollars. The working principle of the killer: When the calculator is added, can be accumulated operation. For example, press “2”, “10”, then press “=”, “2” will be displayed and “=” will be pressed repeatedly. Take advantage of this cumulating principle from the calculator