High Sensitive AC Tester With CD 4017 And BC547

high sensitive AC tester with CD 4017 and bc547
this tester amazing sensitive AC frequency

using
1) cd4017 IC
2) bc547 transistor
3) 1K resistance
4) 150 ohms resistance
5) 12 volt dc buzzer

thank you for watching

please like share and comment
don't forget subscribe

#electronics
#highsensitivityactester
#CD4017IC
#BC547TRANSISTOR
#nonconnectingACtester

Security alarm with LDR || LIGHT ALARM ||

Automatic solar rechargeable light circuit

TOP3 electronic project with bc547

How to make pocket Power Bank at home

How to make LED rice chain at home

how to make LED chaser without IC