Vehicle Device Control System
Budget: $750 – $1,500 USD
I am building a small system that will ride on a vehicle and needs smart power and signal management. Two of the three loads are a Camera and a Transmitter; the third is still open for discussion once the basic framework is proven. An Arduino-class board running Python (CircuitPython or MicroPython is fine) will sit at the center of the design.
Core behaviour
• A proximity sensor with a simple NO/NC or other switched-DC output tells the microcontroller when the vehicle is near its target. On that event the code must turn the devices on or off, make or break the live analog video path, and if required trigger visual or audible alerts.
• A vibration/accelerometer module tracks motion. When the vehicle has been still for a preset timeout the controller should cut power to all three devices, blink a “sleep” pattern on an LED, and enter a deep-sleep state to save the battery. Once vibration resumes the system must wake cleanly and restore previous operating conditions.
• Battery voltage comes from a 12 V source. The program should sample it through a divider, map the reading to three voltage bands, and blink an LED (slow/medium/fast) so the operator can judge remaining capacity at a glance.
What I will need from you
1. Well-commented Python firmware ready to flash on an Arduino-compatible board (ESP32, RP2040, etc.).
2. A concise wiring diagram showing relays/MOSFETs or other interfaces for the Two Cameras, Transmitter, plus the voltage divider, proximity sensor and accelerometer.
3. Guidance on any external libraries or versions required.
4. A short test plan or demo script that proves:
– proximity input reliably switches power and video,
– battery voltage bands drive the LED patterns,
– inactivity triggers sleep and movement wakes the system.
I can share a fuller spec sheet, pin map and desired timing values as soon as we start. If you are comfortable with Python on microcontrollers, analog video switching and low-power design, I look forward to working with you. I am not an electronics designer myself, but can get answers from other employees here.
Core behaviour
• A proximity sensor with a simple NO/NC or other switched-DC output tells the microcontroller when the vehicle is near its target. On that event the code must turn the devices on or off, make or break the live analog video path, and if required trigger visual or audible alerts.
• A vibration/accelerometer module tracks motion. When the vehicle has been still for a preset timeout the controller should cut power to all three devices, blink a “sleep” pattern on an LED, and enter a deep-sleep state to save the battery. Once vibration resumes the system must wake cleanly and restore previous operating conditions.
• Battery voltage comes from a 12 V source. The program should sample it through a divider, map the reading to three voltage bands, and blink an LED (slow/medium/fast) so the operator can judge remaining capacity at a glance.
What I will need from you
1. Well-commented Python firmware ready to flash on an Arduino-compatible board (ESP32, RP2040, etc.).
2. A concise wiring diagram showing relays/MOSFETs or other interfaces for the Two Cameras, Transmitter, plus the voltage divider, proximity sensor and accelerometer.
3. Guidance on any external libraries or versions required.
4. A short test plan or demo script that proves:
– proximity input reliably switches power and video,
– battery voltage bands drive the LED patterns,
– inactivity triggers sleep and movement wakes the system.
I can share a fuller spec sheet, pin map and desired timing values as soon as we start. If you are comfortable with Python on microcontrollers, analog video switching and low-power design, I look forward to working with you. I am not an electronics designer myself, but can get answers from other employees here.