페이지 정보작성자 키트 작성일2017-08-25 10:16 조회2,253회 댓글0건
UP/DOWN FADING LED Circuit
A Circuit that fades an LED on and off.
These two circuits make a LED fade on and off. The first circuit charges a 100u and the transistor amplifies the current entering the 100u and delivers 100 times this value to the LED via the collector-emitter pins. The circuit needs 9v for operation since pin 2 of the 555 detects 2/3 Vcc before changing the state of the output so we only have a maximum of 5.5v via a 470R resistor to illuminate the LED.
This video walks you through building this circuit using a breadboard.
1x - NE555 Bipolar Timer
1x - LED (Red) 1x - 470 Resistor (1/4W)
1x - 33K Resistor (1/4W)
1x - 100�F Electrolytic Capacitor (16V)
1x - BC547 NPN Transistor
1x - 9V Voltage Battery
등록된 댓글이 없습니다.