Hayden Geiger

Hayden Geiger

Discipline
Electrical Engineering
Institute
Univ. of Cincinnati
Team
Bearcats Electric Racing
Grad
2030
Status
Seeking a spring co-op

PCB design, embedded firmware and test instrumentation for a Formula SAE electric car.

Background MainBoardRev2 — designed by H. Geiger in Altium

Scroll

// About me

Hayden Geiger

Who I am

I'm an electrical engineering student at the University of Cincinnati, on the EV electronics side of Bearcats Electric Racing. I mostly work on the parts of the car that tell you what it's doing — the circuit boards, the firmware, and the benches and rigs that prove a design actually works.

So far that's a four-layer STM32 data-acquisition board, a four-wire bench for testing battery cells, and a reflow oven the team uses to build its own boards. The work I like best ends in a real measurement, and I'd rather catch my own mistakes on the bench than in the car.

I'm looking for a spring co-op in embedded, electronics, or test engineering.

Specialties

  • PCB design (Altium)
  • Embedded firmware
  • Test & measurement
  • Battery & cell testing
  • High-voltage safety
  • Mechanical CAD (Fusion 360)

Education

B.S. in Electrical EngineeringUniversity of CincinnatiExpected 2030
High School DiplomaSpringboro High School2025

Certifications

  • Autodesk Fusion 360 — Certified
  • Altium Designer — Certified

// Projects

05 projects
StatusIn progress
Period2025–
StackSTM32H723VET6 · Altium Designer · FDCAN · FatFS · C++

FSAE data acquisition board

A 4-layer STM32H723 data acquisition board for the Formula SAE electric car — three FDCAN buses, inertial and GPS logging to SD, and an 802.11ah telemetry link. Schematic and layout in Altium; firmware not yet written.

Bearcats Electric Racing's EV4 on track — Formula SAE electric car in red-white-and-black Cincinnati livery on gold wheels and Hoosier EV slicks.
Bearcats Electric Racing's EV4 — last year's car.
StatusIn progress
Period2025–
StackBK Precision 8601 · ESP32 · MAX6675 · Four-wire Kelvin sensing
My partDesigned the four-wire Kelvin test jig to handle 120 A+, ran the tabless cell research, and selected the cells under test.

Cell characterization bench

Built a four-wire Kelvin test jig rated past 120 A for characterizing 21700 cells before pack integration. Ran tabless cell research and cell selection, with a six-channel MAX6675 thermal rig logging temperature rise to a 50 °C cutoff.

StatusShipped
Period2026
StackESP32 · Thermocouple · 3D-printed enclosure · Embedded web UI

Reflow oven controller

Converted a toaster oven into a controlled reflow oven driven by an ESP32, with a thermocouple, local LCD and encoder, and a web interface for profile control. Brought board assembly in-house instead of waiting a week on an assembly house.

A Black & Decker Toast-R-Oven Plus with NO FOOD written on the glass door, wired to a black 3D-printed controller box whose LCD reads 126.2 degrees, stage HEAT, on the Leaded profile.
Shipped 2026
StatusShipped
Period2025–2026
StackESP32 · Custom PCB · TMC2209 · NEMA 17 steppers · AS5600 encoders · Embedded web UI · Daly BMS · Autodesk Fusion 360

Dual-axis star tracking mount

Built a battery-powered dual-axis (alt-azimuth) star tracking mount — NEMA 17 steppers through 71:1 planetary gearboxes, closed-loop encoders, a custom ESP32 board and a Wi-Fi web UI — and validated tracking with a GoPro and an iPhone.

The assembled dual-axis mount — a 3D-printed altitude fork on an azimuth base, driven by a stepper motor through a planetary gearbox labelled 1:71.
Assembled dual-axis mount — 1:71 planetary gearbox
ESP32 Wi-Fi2× NEMA 1771:1 planetaryTMC2209AS5600 closed-loopSamsung 50E + Daly BMS
Read the write-up
StatusShipped
Period2025
StackFusion 360 · 3D printing · Altium Designer · ESP32 · DC-motor anemometer
My partCAD-modelled and 3D-printed the prototype and the anemometer, designed the test-setup electronics, and laid out the anemometer PCB in Altium.

Microfarm prototype & anemometer

A first-year ENED team project for the Pine Ridge Reservation — a 3D-printed microfarm that breaks the wind for a small garden. I did the CAD and printing and built the test rig, including an anemometer I made from scratch (my own Altium board and a printed impeller) to measure how much the wind dropped inside.

The finished project on a windowsill — the 3D-printed microfarm with black wind mesh on its frame, and the printed anemometer beside it.
The printed microfarm and the finished anemometer

// Instruments & processes

What I actually use

// Contact

Seeking a spring co-op

Location
Cincinnati, Ohio