Wiring schematic — Super 8 Digital Cartridge

Simulation

Power (EN switch)

Motor spinning

Toggle power first, then spin the motor to see GPIO4 chatter.

3.3V

LED

GPIO4: —

REC

Raspberry Pi Zero 2 W

4 header pins: 3.3V, 5V, GND, GPIO4

Lipo Rider Plus

Charger + 5 V booster, EN switch

Battery 3.7 V / 2600 mAh

JST 2.0 → booster

SPDT slide switch

External power toggle (EN ↔ GND)

LDR + 10 kΩ

Voltage divider on GPIO4

White LED + 330 Ω

Always-on light source

Super 8 motor

Shutter chops the light tunnel

Camera (OV5647)

CSI ribbon to Pi — separate circuit

5 V rail

Booster → Pi · LED + 330 Ω

GND rail

Booster → Pi · battery · LED cathode

3.3 V & GPIO4

Pi 3V3 → LDR top · LDR → junction

10 kΩ pull-down

LDR/GPIO4 junction → Pi GND

LDR bottom leg

Ground return for LDR

Switch loop

Booster EN ↔ SPDT ↔ GND

Hover any wire or component to trace its connections. Click to lock the highlight.

The LDR divider is tied to 3.3 V, not 5 V — GPIO pins on the Pi are not 5 V tolerant.