Great timer and shipping time was quick! If you are unfamiliar with python programming, running the test code will fail w/ I/O error if your boards EEPROM i2c address is 0x57. Just change the "at24c32_addr" variable to the correct one; in file SDL_D3231.py. A code comment would be helpful at line 79. You will also get another I/O error if you enable the timer as a RTC for the Raspberry pi and run the test code. If you use the tool i2cdetect -y 1 and the 0x68 address is shown as UU, it is blocked from access. I did not test it with Arduino library, wanted it as a rtc for the Pi. Thanks Switchdoc Labs.
I needed an I2C expander for my project, with multiple identical sensors that have set i2c addresses. I have seen other muxes, but this one fit the bill perfectly, just to be able to power the individual channels separately was the deciding factor. Connecting 3.3v and 5v sensors to an Raspberry Pi without much fuzz has made things easier.
I bought two of these and I am considering buying some more, the version with the grove connectors looks tempting....
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.
Time adjustment pot difficult to set since no markings. Board is large for number of components. When connecting to a Pi need to ensure that you use a GPIO that is high impedance or OV on power up (not all of them are !). Otherwise the Watchdog works fine for me.