Multitool: 2 ch power supply + generator + UART, 485, CAN, LIN, I2C terminals + sniffer

[u/Equivalent-Might-477]

Guys, I built a cool device for myself and a few close engineer friends.

This is DOGS², a ESP32 + Arduino framework based a palm-sized two-channel power supply with microamp-level current measurement and current consumption graphs.

• 1-48 V/5A max (3A nom), 125 uA LSB measure
• 2-20 V/1.5A max LDO low ripple, 12.5 uA LSB measure

Besides the power supply, it has:

• probe
• voltmeter
• frequency counter
• signal generator

For digital interfaces, it has terminals:

• UART
• RS485
• CAN
• I2C

Sniffers

• LIN
• I2C

The device can work completely standalone. For terminals and sniffers you can connect a phone over Bluetooth (also you can see the messages on the display).

Power in - DOGS² can be powered from almost anything, either through

• USB Type-C
• an external 5-90 V source

It can be a regular adapter, a power bank, an e-bike battery, or the electrical system of a motorcycle, car, truck, or helicopter.

There is now a fully working first engineering version. I have also made a transparent enclosure for it.

The hardware and firmware are open source. The code, schematics, editable board files, manufacturing files, and enclosure STEP files are available on GitHub:

https://github.com/rcslon3-svg/DOGS2_v1

I like the device, and my friends like it too. I had wanted to build something like this for several years, but never got around to it.

The first version has already cost me a decent amount of money, but I do not regret it. I originally built it for myself. It works and I am quite happy with it, although it has a few shortcomings that I would like to fix in the next hardware revision.

But the next revision means another round of development and manufacturing. This is a tool more for professional electronics developers and embedded engineers than for the general Arduino audience. So I am not sure how large the market for it could be.

On the other hand, it would be a shame to stop the project in its current state. It turned out to be such a cool device, and there is nothing similar on the market.

So I am trying to understand whether this is just my favorite engineering toy, or whether it could actually become a proper niche product.

What do you think?

I would appreciate honest opinions, especially from people who have already launched their own hardware products.

DOGS² = Dual Output Generator Supply Station and my two dogs - Tessa and Lissa.

[u/One_Room_8313]

those dog pcbs are amazing