Adom Custom Electronic Load
Public Made by Adomby adom
Independent compact digitally controlled load design for 3rdPartyFab; research and AIFlow evidence in progress
10054d3
55m ago
Adom custom electronic load
R0 engineering prototype — not released for fabrication. A digitally controlled, fan-cooled constant-current load designed as an Adom molecule for the probing workcell.
The provisional target is 25 W, 24 V and 3 A with simultaneous limits; the first acceptance DUT is the 12 V-to-5 V, 1 A buck molecule. The lower-cost pass transistor targets 5–24 V loading. USB CDC is the preferred control-panel link, with 3.3 V UART contacts for future automated wiring. Auxiliary 5 V powers the fan and logic independently of the DUT.
The architecture uses an IXTP15N50L2 linear MOSFET, four-terminal 20 mΩ shunt, OPA189 servo, DAC60501 setpoint, INA226 telemetry and STM32G0B1 supervisor. Hardware comparators, an asynchronous fault latch and an external watchdog hold the gate off on faults. Cooling and the complete measurement error budget remain under review.
Current evidence
- A 102-component hierarchical schematic passes native KiCad ERC; all 52 intended nets match the native exported netlist.
- Six limited current-servo sensitivity cases pass using TI's amplifier model and an approximate MOSFET. This is not full circuit or hardware validation.
- The portable C safety-policy core passes host tests. Flashable MCU firmware and USB integration are not complete.
- A native molecule PCB and portable component models exist. Placement review is active; routing and fabrication outputs are not complete.
- Build footage is being collected. Failed/static captures are identified in the shot log rather than included as action footage.
Read the engineering status, placement review, cost breakdown, firmware/control-panel contract, and raw clip log. The AI Flow report records the run.
The 3rdPartyFab two-layer rules are loaded. Native DRC, current/thermal analysis, the cooling assembly, physical calibration and industrial qualification must pass before production use. No hardware has been built or ordered.
# Adom custom electronic load
**R0 engineering prototype — not released for fabrication.** A digitally controlled, fan-cooled constant-current load designed as an Adom molecule for the probing workcell.
The provisional target is 25 W, 24 V and 3 A with simultaneous limits; the first acceptance DUT is the 12 V-to-5 V, 1 A buck molecule. The lower-cost pass transistor targets 5–24 V loading. USB CDC is the preferred control-panel link, with 3.3 V UART contacts for future automated wiring. Auxiliary 5 V powers the fan and logic independently of the DUT.
The architecture uses an IXTP15N50L2 linear MOSFET, four-terminal 20 mΩ shunt, OPA189 servo, DAC60501 setpoint, INA226 telemetry and STM32G0B1 supervisor. Hardware comparators, an asynchronous fault latch and an external watchdog hold the gate off on faults. Cooling and the complete measurement error budget remain under review.
## Current evidence
- A 102-component hierarchical schematic passes native KiCad ERC; all 52 intended nets match the native exported netlist.
- Six limited current-servo sensitivity cases pass using TI's amplifier model and an approximate MOSFET. This is not full circuit or hardware validation.
- The portable C safety-policy core passes host tests. Flashable MCU firmware and USB integration are not complete.
- A native molecule PCB and portable component models exist. Placement review is active; routing and fabrication outputs are not complete.
- Build footage is being collected. Failed/static captures are identified in the shot log rather than included as action footage.
Read the [engineering status](docs/status.md), [placement review](docs/placement-review.md), [cost breakdown](docs/cost/README.md), [firmware/control-panel contract](docs/firmware-contract.md), and [raw clip log](videos/shotlog.json). The [AI Flow report](docs/runs/board-codex-20261007-1749/README.md) records the run.
The 3rdPartyFab two-layer rules are loaded. Native DRC, current/thermal analysis, the cooling assembly, physical calibration and industrial qualification must pass before production use. No hardware has been built or ordered.