Blinking LED Circuit Design
Worked for 1 min 12 sec
Updated 4 existing VBAT_RAW trace segments to Bottom Copper.
Thought for 1 sec
- Set Trace's layer to "Bottom Copper"
- Set Trace's layer to "Bottom Copper"
- Set Trace's layer to "Bottom Copper"
- Set Trace's layer to "Bottom Copper"
i want you to update placement of J1 in the same location as SW1 and flip it's side to avoid overlap of the two
Worked for 38 sec
Moved J1 to SW1’s exact PCB position and flipped J1 to the Bottom side to avoid top-side overlap. Post-check shows no overlapping copper errors, with 14 airwires still remaining overall.
Check J1/SW1 DRC
Route J1 airwires
Show placements
Verify connector clearance
Thought
- Set J1's position to "-3.6616mm -26.9586mm"
- Set J1's layer to "Bottom"
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Project Specification — 555 LED Blinker
Goal
Design a simple through-hole timer circuit that blinks a red LED once per second from a 9V PP3/block battery through an on/off switch.
Architecture
Diagram
Selected values
- U1: NE555P, DIP-8 through-hole timer.
- J1: Keystone 967 9V battery snap connector.
- SW1: SPST maintained on/off switch in series with battery positive.
- R1 = 47kΩ, R2 = 47kΩ, C1 = 10uF for astable timing.
- Calculated frequency: f = 1.44 / ((R1 + 2R2) x C1) = about 1.02Hz.
- R3 = 680Ω for approximately 10mA red LED current from 9V, allowing for LED forward voltage and 555 output drop.
- C2 = 100nF VCC decoupling, C3 = 10nF control pin bypass, C4 = 10uF bulk input capacitance.
Hand-soldering notes
All selected components are through-hole or hand-solder-friendly: DIP-8 IC, axial resistors, radial/disc capacitors, through-hole/panel switch, battery connector, and 5mm LED.
Goal
Architecture
Selected values
Hand-soldering notes
