I gathered this list of investors who are hardware specialists or have expressed their interest for hardware startups. Most of them are consumer oriented. Be warned that their position regarding open source hardware might still be unclear. Gather your best convincing skills, and rock on!
At Adafruit we received the most offers for funding as word got out we are a profitable self-funded company making hardware in NYC, so that’s another way to roll too.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.