Prototype battery board with a second expansion slot
hdknstn's hand-built battery board adds a second card slot so an Ethernet/USB 3.0 card and a KVM card can live in one console.
What it takes
- Disassembly
- Soldering
- Purchase required
Difficulty 3 of 3 — advanced.
Details
Intended as a board with one connector and two traces, it grew into a working — if, in the author's words, rather scary — battery board with an extra expansion connector, on a HackerGadgets CM5 adapter. The build also carries an Airspy SDR, GPS, LoRa and a 10 Ah battery. A prototype, not a product.
Links
Open at Forum threadRelated mods
Zucker's open KVM card based on the yuzuki-hcc HDMI capture design; standard or micro-HDMI input, recessed to fit the case.
A community PCB that replaces the 4G modem with four extra USB ports — schematic and layout on Codeberg.
An open expansion card with a LoRa radio (RFM98-class module) and a GNSS receiver, designed for Meshtastic-style use.
A DigiRig 1.9 clone on an expansion card: audio interface with PTT and a UART, both on 2.5 mm jacks, plus an RTC — for portable digital modes.
Zucker's minimal card: a microSD slot, an internal-facing USB port and every GPIO from the PCIe-style connector broken out.
AleReb's card adds more GPIO, a camera connection and several I²C headers, built on PotatoMania's KiCad template.