What you can build
Real boards Ohmni can design today, filed like a magazine: connected nodes, mains, motion, and music — analog, digital, and hybrid.
Connected
WiFi nodes, radios, and things that live in the field.
ESP32 sensor node
A WiFi sensor node is the classic first connected-hardware project: a microcontroller, a digital sensor, power, and a way to program it. With Ohmni you describe it in a sentence and get back a board you can send to a fab — no schematic capture, no footprint hunting, no routing.
Weather station
Battery designs add a charger, power-path, and careful power budgeting to the usual sensor-node recipe. Describe what you want to measure and how it should charge, and Ohmni delivers a compact board that runs on a cell and tops up over USB-C.
LoRa field node
Off-grid nodes live or die by their power tree. This board runs a real cascade — Li-ion cell, charger with power path, boost to 5 V, then a clean 3.3 V rail — and every stage is sized and simulated against the radio’s transmit bursts, not just its idle draw.
Modbus-to-LoRa gateway
This is the kind of board people assume AI cannot do: mains power, a galvanically isolated fieldbus, and a long-range radio on one PCB. Ohmni handles the domain discipline for you — mains, isolation barriers, and the SELV side are kept separate and checked, not left to hope.
GPS tracker
A position logger is two buses working together: a GPS receiver streaming fixes over UART and a flash chip recording them over SPI. Ohmni wires both to the ESP32, budgets the rail for the GPS receiver’s acquisition current, and hands you a board ready to track.
Mains & power
Boards that touch the wall — isolation included.
Motion
Motors, throttles, and the dirty 12 V domain.
Music
Analog-purist voices, digital grooveboxes, and hybrids.
Analog instrument
Analog builders want gain as a current, not a multiply in firmware. This board is a guitar-or-synth voice with no MCU: a high-Z instrument jack, a split-rail LM13700 VCA, a panel pot for volume, and a real headphone amp. Describe the voice; Ohmni wires the analog chain.
Analog synth
A complete analog voice with no firmware in the path: a triangle-and-square OTA oscillator, a voltage-controlled filter, an attack/release envelope from a gate jack, and an OTA VCA into headphones. Describe the voice; Ohmni wires the analog chain.
Analog drums
Hats and snares start as noise, not as samples. This board is a gated analog drum: a transistor noise source into an OTA filter, an attack/release envelope from a gate jack, and an OTA VCA into headphones. No MCU. Describe the hit; Ohmni wires the analog chain.
Pocket groovebox
Digital instruments live on I2S and MIDI, not on OTAs. This board is a USB-C ESP32 groovebox: TRS MIDI in and out, a stereo DAC into a real headphone amp, and a bank of panel pots on one ADC. Firmware owns the sound; Ohmni owns the hardware.
Guitar + MIDI mixer
The interesting boards sit between analog and digital. This one takes a high-Z guitar jack and an I2S DAC, sums them on an analog mix bus, and drives headphones — MIDI in so the firmware can play along. Mid-rail analog is AC-coupled into the amp so the jack stays quiet.