下載 APKPure App
可在安卓獲取555 Timer Project Free的歷史版本
此應用程序提供例如555定時器電路
This application provide the circuit for 555 Timer IC .It can be use for student or engineer as an reference when use 555 Timer.Not just that it also can be combine with your electronic projects and circuits .This application do not need internet to working.Thank you