Hello everyone. I’ve been tinkering with electronics most of my life, do a bit of design in my day job, and have been doing some consulting as well recently. This year I’m also hoping to branch out into a bit of product design of my own. Here are a couple of things in progress:
- Home security system. Currently we pay $50/mo for a security system gives me very little peace of mind or convenience, I’m hoping that by designing my own hardware I can get something secure, affordable and easy to extend. Currently have a PIR and hall switch sensor, but plan to add cameras, audio and glass break. Goals are to keep unit cost to a few $, and battery life at least 1 year. First attempt was based on nrf52832 BLE modules, but after learning Nordic’s SDK and coding some firmware, I realized range wasn’t going to be sufficient. Now using nrf24l01+atmega, with designs optimzed for JLCPCB assembly.
- Spelling Cube. Toy idea for toddlers learning to read, still in the very early prototyping stage. So far I just have these custom mini neopixel arrays which will be arranged into cubes, need to design the guts which will have BLE, accelerometer, speaker, battery/inductive charging…
- USB3 DAQ. Trying to create a low-cost data acquisition tool that can sample 2x14b ADC at least 40MSPS. FT600 for USB3 and Ice40 FPGA to interface with ADC, I’m planning to use this digilent board until I get the digital side figured out. Thought I could save time starting with the Manila Ice board but I had to rip out most of the interesting parts to free up pins… this layout is super quick and dirty (2 layers!) as I didn’t want to wait till the end of CNY, so it will be interesting to see if it works regardless.