Hello everyone!

It has been another long hiatus here at Hallman Labs, however I promise you this was essential in me graduating from Computer Engineering with Cum Laude honors!


Hallman Labs at Graduation for a B.S. in Computer Engineering and a minor in Mathematics.

In the last two semesters, I was taking 33 hours of all Engineering courses, so there was absolutely zero free time to write. I have now re-opened the stores, so we are selling capacitors again.

Speaking of the Capacitor store, below is the updated progress on creating the S. Groner (Linear Audio) Quad Bridge for measuring THD of capacitors down to -170 to -180dB! (My post on this is here)


First pass at my QuadBridge THD device.

Note: I am actually working on this to practice for my new position. I’ll mainly be doing PCB design in Eagle!



I apologize about the long delay on the Sparkos SS2590 Review. I am now in the process of creating this review and I expect to have this done in the next month or so. It would be earlier, but I’m starting a new job for an Engineering firm, focusing on PCB design work and firmware.

The reason it’s still going to take a bit, is because I want to try and create my first video review for this!

I just want to thank all the readers out there who have been in contact with me over the past year and some change. I have heard some interesting product ideas and have talked to some new companies. I have also been in talks with a few guest writers; they are currently working on projects which may get published on here in the future.

Stay tuned for more!

Keith H.
(Owner-Operator of HL)

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