CD4047 IC Monostable/Astable Multivibrator HEF4047
CD4047B consists of a gatable astable multivibrator with logic techniques incorporated to permit positive or negative edge-triggered monostable multivibrator action with retriggering and external counting options.
WeMos D1 ESP8266 Wifi Board
Timer 555 IC تايمر مؤقت555
PIC16F628A microcontroller 











