LED Blinker Circuit Design
Thought
- Connected U1:CV, U1:GND, GND:GND
- Disconnected U1:CV from C2:P2
Thought
- Connected U1:VCC, BT1:P, C2:P1
Thought
Schematic: 9V NE555 ~1 Hz LED blinker is built and wired
Parts added (all through-hole)
- Timer: U1 (NE555 DIP-8)
- Power input: BT1 (9V snap)
- On/off: S1 (SPST-NO tactile used as series switch)
- Timing network: R1 (10k), R2 (68k), C1 (10uF)
- Decoupling: C2 (100nF)
- LED output: LED1 (red LED), R3 (1k)
- Power: BT1 -> S1 -> U1 VCC, with C2 across VCC/GND
- Astable: U1 TR+THR tied to timing node, R1/R2/C1 wired in standard astable configuration
- Output: U1 Q -> R3 -> LED1 -> GND
- A basic PCB outline was set to 60 mm x 40 mm (grid 2.54 mm) to suit through-hole, hand-solderable layout.
