Rigid-flex smart ring for Islamic prayer companion use, with compact BLE SoC, capacitive swipe electrodes, haptic feedback, rechargeable battery power, and body-worn BLE antenna constraints.
Custom 4S CATL NCM module BMS/CMU sampling and passive balancing board for a Toyota Prius hybrid battery retrofit using BM3451SMDC-T28A with isolated CO/DO fault outputs and M4 sense studs.
Custom 4S CATL NCM module BMS/CMU sampling and passive balancing board for a Toyota Prius hybrid battery retrofit using BM3451SMDC-T28A with isolated CO/DO fault outputs and M4 sense studs.
Custom 4S CATL NCM module BMS/CMU sampling and passive balancing board for a Toyota Prius hybrid battery retrofit using BM3451SMDC-T28A with isolated CO/DO fault outputs and M4 sense studs.
Custom 4S CATL NCM module BMS/CMU sampling and passive balancing board for a Toyota Prius hybrid battery retrofit using BM3451SMDC-T28A with isolated CO/DO fault outputs and M4 sense studs.
Cyberdeck power distribution hub using a TP4056 Type-C Li-ion charger module, MT3608 boost converter module, switched output rail, voltmeter, servo, Arduino VIN, button signal header, and battery terminal on a 50 mm × 70 mm PCB.
Solar-powered dashboard compass for an FJ Cruiser with rechargeable battery backup, retro orange three-digit 7-segment direction display, and rotary brightness/off control.
ESP32-centered controller PCB with 14.8 V battery bus, external 3.3 V and 12.2 V buck converter interfaces, motor logic headers, and servo driver connections.
High-current 12V to 5V robot power distribution PCB with XT60 battery input, inline fuse protection, switched 12V rail, 5V/5A buck regulation, dedicated outputs for Raspberry Pi, sensors, USB hub, fan, and motor power distribution.
Solar-powered dashboard compass for an FJ with a 3-digit seven-segment direction display, magnetometer sensing, low-power MCU control, rechargeable battery storage, and solar charging.
100 mm x 140 mm ESP32-based 18650 battery state-of-health analyzer prototyping board with active MOSFET discharge switching, current/voltage measurement, OLED UI, DS18B20 temperature input, and fan control.
24 V DC powered ESP32-C6 Matter/Thread WiFi/BLE environmental presence sensor with USB-C programming, mmWave/PIR motion sensing, temperature, humidity, light and air-quality sensing, plus optional Li-ion battery and solar charging power path.
Automated NiCad battery tester for calibration lab. Tests all 12 cells of a meter's battery pack in situ (no disconnect) under a 150
▎ Ω / 15-min timed load. Per-cell measurement via 13 pogo contacts (7 rail + 6 V-gap junctions) into 4× ADS1115 over I²C. ESP32-S3 controls a logic-level MOSFET for load
▎ switching. Wirelessly prints PCL5 reports to an HP printer and ZPL labels to a Zebra. Production target: 10–12 units. Bench rig already validated; this is the production PCB.
A buck converter that can be powered from a Li-ion battery and output 3.3V @ 500mA .
Powered by the TPS63051YFFR and in the same package as a converter.
Input Voltage Range 2.5V to 5.5V.
