DOGS² — Dual Output Generator Supply Station

They look pretty good and there aren't any major mistakes.

 The only thing is it took a really long time – they took about a week to print and then nearly another week to get to me.
Anyway – take a look at how they turned out.

The DOGS² enclosure design has been completed as a 3D model. The images show the enclosure with the boards installed inside, along with two versions of its exterior design.

The overall dimensions and internal layout are the same in both versions. The only difference is the treatment of the outer edges: the first version retains sharp corners, while the second adds fillets.

I have not yet decided which version suits DOGS² better. I would like to hear the community’s opinion: which enclosure would you choose—one with sharp edges or one with rounded corners?

 DOGS² v1 is working engineering hardware, and the current prototype runs the latest firmware. This is not a finished product yet, but most of the functions that define the instrument are already operational.

Working now

• Channel A: low-noise linear output up to 20 V / 1.5 A, with a current-measurement LSB of 12.5 µA below 400 mA and 50 µA above 400 mA.
• Channel B: switching output up to 48 V / 3 A continuously or 5 A for short periods, with a current-measurement LSB of 125 µA.
• Logic probe and voltmeter with measurement up to 25 V.
• Frequency counter up to 100 kHz.
• Square-wave generator from 1 Hz to 100 kHz, with 1–99% duty cycle and an output of up to 20 V / 1 A through Channel A.
• UART and RS485 terminals.
• Reception, filtering and transmission of 11-bit CAN frames.
• I2C master and passive I2C sniffer with address filtering.
• Bluetooth SPP for phone terminals and current-consumption graphs.

Still under development

• LIN sniffer and 1-Wire decoder.
• Adjustable sweep speed for the current graph.
• Output-resistance estimation for the probe.

Current work

I am tuning the DC/DC compensation networks, measuring the actual operating limits and minimum output voltages, running thermal tests, refining the firmware, preparing beta-test documentation and designing a transparent-plastic enclosure. A dedicated mobile application is also may be possible later.