玩具bp机.ewb

EWB经典实用列子

Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"                                                                                                                                        玩具BP机  " 
"                                                                                                                                  设计者    徐正国" 
"                                                                                                                                   1999年12月23日" 
"          本玩具BP机可以模仿BP机的呼叫提醒功能，每按一次开关，就能听到呼叫声，开关弹起后，响声将经一定时间消失。 随着 现代生活的快速发展，人们的交际场合不断扩大，应酬越来越多，有时不好意思辞别客人。此时只要按一下该机，发出声响，就有一个很好的借口，光明正大地辞别客人，故又称之为“礼貌辞客机”。下面是其线路，技术指标和要求。" 
"                  技术指标：直流电压：3V       输出功率：300mW" 
"                  要求：体积小，使用方便，趣味性高。" 
"            本电路由一个3V直流电源（两节5号电池），CMOS型4011集成块，一个运放（放大倍数大约为100）组成。" 
"                   仿真方案：首先按1键，打开电源，再按空格键，就会发出提醒主人的响声。" 

EncryptionType: 2
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