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.
ESP8266 _ ESP-01 based on ESP8266 WiFi Module
Resistor 33K Ohm 1/4W
PIC16F877A microcontroller 










