Ilya Shinkeyev
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Design & Fabrication

2018 Ram ProMaster 2500 Conversion

A self-directed engineering project transforming a high-roof cargo shell into a fully livable, four-season mobile home.

Rochester, NY → Ohio
2020 – 2022
~$10k Build Budget
Vehicle Platform
2018 Ram ProMaster 2500 High Roof
Battery Bank
~200 Ah LiFePO₄
Solar Array
400W (4× 100W Panels)
Climate Control
MaxxAir Fan + 12V Diesel Heater
Controller Logic
Custom ESP32 w/ Web UI
Water System
6 gal Fresh / Gray, Foot Pump
Skills Embedded Systems ESP32 / Arduino Carpentry 12V Circuit Design Solar Integration Root Cause Analysis

Scope & Structural Build

Purchased as a blank slate with ~800 miles, this project was executed primarily outdoors during the 2020 COVID shutdowns. The build required converting a bare metal shell into a livable space within a strict 4-month deadline before starting a full-time engineering role in Ohio.

  • Framing & Insulation: Designed wooden structural framing attached via sheet metal screws and construction adhesive for vibration damping. Insulated with 1–2" sheep wool for moisture management and sound deadening.
  • Fabrication: Cut chassis openings for a roof fan and sliding window. Constructed integrated cabinetry, a fixed bed platform, and under-bed storage in a highly space-constrained volume.
  • Repurposed Materials: Reworked timber from deconstructed kitchen cabinets into custom van cabinetry. Implemented compliant, friction-based catch latches to ensure doors remained closed under road loads.

Electrical Grid (12 VDC)

Designed a robust off-grid power system anchored by ~200 Ah of LiFePO₄ batteries. All conductors and fuses were sized based on current draw and run length to mitigate voltage drop and overheating risks.

  • Solar Array: Fabricated a custom roof rack using McMaster-Carr L-brackets and marine-grade hardware (nylon insert lock nuts) to mount a 400W array. Validated aerodynamic stability by instrumenting the roof with a GoPro at highway speeds (80 mph).
  • Power Management: Integrated an MPPT solar charge controller and a user-switchable 12V-to-12V DC-DC alternator charger for redundancy while driving.
  • Safety: Utilized corrugated loom for abrasion protection in corner regions and centralized fusing to isolate faults.

Engineering Deep Dive: Embedded Heater Control

The 12V diesel heater stock remote offered poor UX and no automation. I iteratively engineered a custom control system to solve this, moving from mechanical actuation to a fully digital solution.

Iteration 1

Servo-Based (Arduino)

Used hobby servos to physically press buttons on the stock remote. Validated the UX concept but suffered from mechanical alignment issues and hot-glue failures.

Iteration 2

Relay-Based PCB

Soldered leads directly to the remote PCB, using relays to emulate button presses electrically. Improved reliability but encountered intermittent relay contact faults.

Final Design (V3)

RF Decoding & ESP32

Sniffed and decoded the 433MHz RF protocol. Built a transmitter-only system on an ESP32 with a local Web UI for smartphone control, temperature thresholds, and status monitoring.

Read the full heater controller deep-dive

Systems & Iterative Design

Water & Plumbing

Implemented a 6-gallon fresh/gray water system via foot pump. Root Cause Analysis: After noticing contamination in the original single-piece jug, redesigned the system with quick-disconnect components for full disassembly and drying to improve hygiene.

Thermal Management

Retrofitted a diesel heater for winter living. Addressed rear-door drafts by diagnosing seal failure caused by debris build-up. For summer, improvised a cooling solution ducting cab A/C to the living area via a thermal barrier.

3D Printed Additions

Designed functional components including a sliding-bolt lock for the fridge rail (preventing extension during braking) and custom waterproof enclosures for the ESP32 control electronics.

"Achieved a reliable 'home on wheels' capable of supporting extended travel to remote parks... and iteratively refined the build over multiple trips home."