I bought one INA3221 break-out board as part of a Kickstarter project so that I could monitor the individual power consumption of three Raspberry Pis. The break-out board is supplied complete with male headers and is ready to use. It arrived well packaged and is a good quality board – no sharp edges and the soldering is sound. The PCB itself is labelled on the component side but if you use the board on a breadboard then the labelling will be underneath so you might want to make your own label to avoid mis-connections. SwitchDoc Labs have provided Python and C++ example programs on Github but since I prefer C, I wrote my own using Gordon Henderson’s wiringPi I2C library. I develop applications on both Raspberry Pi and Arduino and have the INA3221 running successfully on a Pi and Arduino Micro. I have subsequently bought three more INA3221 boards and I am building managed power supplies with configurable trip currents, liquid crystal displays and remote management using a web browser. The web interface shows a mimic diagram of the unit using SVG and AJAX. You can see my INA3221 project page at noveldevices.co.uk/rp-3-channel-i2c-monitor
The dual watchdog works as advertised but I think that the design could be improved.
I needed a watchdog for a current project. I could have designed and manufactured my own but, for two units this was a lower cost option. I only purchased the unit as I could not find any other units online.
Looking at the PCB layout what Tindie could have done is create a better product. With a subtle redesign of the PCB layout you could have a dual channel watchdog as now. Then, by dividing the board (pre-milled to break cleanly) you could have two single channel watchdogs. It's a win-win!
Used various individual voltage/current sensors in the past, have to say that this is one of the quickest I've integrated into a bespoke project. Quick delivery from the seller and good documentation from TI & seller lead to simple integration.