CameraPen Project Specification
Worked for 5 mins 3 sec
I applied the targeted cleanup without touching the main routed trace set: disabled/shrunk U6 dummy mount pads, disabled DRC-listed via/fill/stitch artifacts, and added RF launch width/0.5 mm keepout rules around the LNA/antenna feed.
DRC is still not clean: the checker continues to report the same 42 overlap items, which indicates these are generated footprint/route artifacts that are not being removed by normal layout-rule overrides; the RF route also cannot be manually completed because the matching-network pad net metadata is inconsistent (
U6:LNA_IN on RF_ESP32_FEED, ANT1:1 on RF_ANT_FEED, and C15 pad appears empty to the router).Next best fix is schematic/layout net cleanup for the RF pi-match chain, then regenerate the U6 footprint without the dummy mount pads instead of trying to suppress them in layout.
Worked for 3 mins 18 sec
I executed the RF net metadata fix: merged the ESP32 RF feed and antenna-side feed into a single
RF_ANT_FEED net, then successfully routed U6:LNA_IN → ANT1:1.DRC is still not clean: after refresh it reports 7 airwires and 45 overlap errors; the remaining overlaps are still generated via/through-hole/U6 dummy-pad artifacts that normal layout overrides are not clearing. Also note the RF route was completed but is not final RF-quality yet because the router used a long multi-layer path with vias; the next real fix is to regenerate/replace the U6 footprint and RF matching layout, not keep suppressing generated artifacts.
Rebuild RF and U6
Regenerate U6 footprint
Rebuild RF layout
Fix J3 artifacts
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CameraPen Board Bring-Up Plan
Before Power-On
- Inspect USB-C connector, battery connector polarity, charger IC orientation, LDO orientation, J3 camera FFC orientation, and all passives.
- Confirm selected LiPo cell capacity and safe charge current; current schematic uses R1 = 10 kΩ as an initial low-current charger setting.
- Confirm whether the final controller is the ESP32-CAM prototype reference or a custom narrow PCB.
- Do not insert the OV3660 camera before validating J3 power pins and orientation.
J3 / OV3660 Orientation Checks Before Camera Insertion
- Confirm J3 is Molex 505110-2491 bottom-contact connector.
- Confirm the camera FPC tail has exposed contacts facing the correct side for bottom-contact insertion.
- Confirm physical pin 1 on the camera FPC using the exact module drawing or continuity/breakout test.
- Confirm the inserted orientation maps:
- Camera pin 2 and pin 15 → board GND.
- Camera pin 4 and pin 11 → board
CAM_2V8. - Camera pin 10 → board
CAM_1V5.
- If pin order appears reversed, stop; do not power the camera.
Power Checks Without Camera Installed
- With no battery installed, plug USB-C into a current-limited supply and verify
USB_5Vis about 5 V. - Install a protected 1-cell LiPo and verify
VBATis approximately 3.0–4.2 V. - Verify
3V3output from the main LDO is approximately 3.3 V. - Verify J3 pin 4 and pin 11 are approximately 2.8 V on
CAM_2V8. - Verify J3 pin 10 is approximately 1.5 V on
CAM_1V5. - Verify J3 pin 2 and pin 15 are GND.
- Check charger and LDO temperatures during the first charge/power test.
First Camera Power-Up
- Use a current-limited bench supply for the first camera insertion/power-up.
- Insert the OV3660 FPC only after the no-camera voltage checks pass.
- Start with firmware holding
CAM_PWDN/CAM_RESETin a safe state if available. - Monitor input current and camera rail voltages during enable.
Functional Checks
- Press SW1 and confirm the
BUTTONnet pulls low. - Program/test prototype controller firmware.
- Initialize OV3660 over SCCB/I²C using
CAM_SIOCandCAM_SIOD. - Verify MCLK output, VSYNC/HREF/PCLK activity, and D0–D7 data activity.
- Capture a still image or test frame.
- Measure sleep current and active capture current to estimate battery life.
Mechanical Checks
- Confirm every selected part fits inside the 8–9 mm internal diameter after wall clearance.
- Confirm whether the 12–12.5 mm camera FPC tail can physically fit or fold within the rear barrel.
- For production, plan a long narrow PCB or rigid-flex, with button in Section ①, battery in Section ①, PCB in Section ②, and camera at the rear end.
Before Power-On
J3 / OV3660 Orientation Checks Before Camera Insertion
Power Checks Without Camera Installed
First Camera Power-Up
Functional Checks
Mechanical Checks
