This Is a DIY Power Supply… and Signal Generator… and Logic Probe… and...

You can go surprisingly far in the world of hobby electronics with just a basic multimeter and a soldering iron. But as you progress, you’ll likely begin to accumulate more and more equipment. Then, one day, you’ll look down and find that half your workbench is filled with instruments. Sergei solved that problem by cramming so many of those into one compact device called DOGS² (Dual Output Generator Supply Station).

DOGS² is small enough to fit in the palm of your hand, so it won’t take up much space. But it includes a whole suite of tools and instruments, like:

• A dual-channel programmable power supply
• A logic probe
• A frequency counter
• A signal generator
• Sniffers for several digital interfaces (UART, RS485, CAN, I2C, and more)

It isn’t missing much, other than maybe an oscilloscope (no device is perfect).

For input power, DOGS² will accept 5-90V DC or USB-C. There is protection for overvoltage, reverse polarity, and inrush current. The first output channel has a low-noise linear regulator and can pump out up to 20V 1.5A. The second output channel has a DC-DC converter and can handle continuous delivery of 48V 3A (or as much as 5A for brief periods). Both channels have current-monitoring.

The logic probe can work with up to 25V. The frequency counter can keep up with up to 100kHz. The signal generator produces square waves from 1Hz to 100kHz, at up to 20V 1A.

The complete device consists of the main power board and a control panel board. The latter is built around an ESP32-WROOM. It contains an LCD screen with physical controls and also supports Bluetooth control. Both boards have sweet dog-themed printed graphics.

Sergei has completed the first version of DOGS² and it is functional. But he anticipates iterating on that to incorporate improvements after thorough testing. All of the current files are on GitHub if you’re like to build this version.