Implemented the 9V hand-solderable red LED blinker schematic using a TI NE555P DIP-8, through-hole LED, slide switch, PP3 9V battery holder, axial resistors, and through-hole capacitors. The 555 astable is set to about 1.06 Hz with ~50% duty cycle, so the LED blinks roughly once per second; electrical connectivity checks are clean.

Open items:

Suggested next steps:

The schematic is complete and electrically connected: 11 through-hole components, including the NE555P, battery holder, switch, red LED, timing network, and decoupling.

PCB placement and routing are still required; the current airwire errors confirm the board is unrouted. I couldn’t run or apply auto-layout because the account currently has no available ACUs. Once ACUs are available, the next operation should create/confirm the board outline, place all components, verify placement, then auto-route and run DRC.

No PCB changes were applied. The schematic is complete, but the board still needs both component placement and trace routing, followed by DRC verification.

Auto-layout cannot run because the account has no available ACUs. Once ACUs are available, rerun this request to place the through-hole parts, route all nets, and apply the validated layout automatically.