NE555 ASTABLE LED FLASHER
BREADBOARD LAYOUT — 9V SUPPLY
f = ~1.52 Hz
Duty = ~51%
tH = 0.33 s
tL = 0.33 s
ILED = ~17 mA
+9 V
GND
Signal
Timing
Output
SCHEMATIC — ASTABLE MODE
+9 V
|
[R1] 1 kΩ
|
+-----+ pin 7 (DIS)
| |
| [R2] 47 kΩ
| |
| +---- pin 6 (THR) ---+
| | |
| +---- pin 2 (TRIG) --+
| |
| +--------+ [C1] 10 µF
| Vcc --| 8 4 |-- Vcc |
| | | |
| DIS --| 7 3 |-- OUT --+--[R3] 330 Ω--[LED]-- GND
| | NE555 |
| THR --| 6 2 |-- TRIG
| | |
| CTRL -| 5 1 |-- GND
| | +--------+ |
| [C2] 100 nF |
| | |
+---+------------------+
GND