Products > Test Equipment
Show the homemade equipment you are using now.
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ccktek:
Latest addition to the brood:

Variable isolation transformer (2023) 

https://www.eevblog.com/forum/testgear/show-the-homemade-equipment-you-are-using-now/msg4498885/#msg4498885



fable:
Here are some of the tools i have made and use every day

First picture from top to bottom
Dummy Load
PSU ac/dc
vacuum pump pickup tool
triple soldering iron controller

2.  PSU 2x24v 2A
3.  Soldering iron and desoldering gun controller
4. Differential probe
KungFuJosh:
This is my vacuum tube curve tracer.

In my current unit, I added a step up converter for the heater voltage. Now I can run heater voltages at 20V easily (or higher, but I don't have any need for that).
py-bb:

--- Quote from: MiroS on February 07, 2023, 12:33:58 pm ---
--- Quote from: MrYakimovYA on January 28, 2023, 07:25:42 am ---A bit of horror is inside.

--- End quote ---

I fully agree.

--- End quote ---

But totally worth posting - I learn a lot from just seeing how some of these are assembled.

Never be afraid to post a monstrosity, if we only posted perfection there would be no posts!
Hexley:
This device tests batteries of various types -- button cell, AAA, AA, C, D, and N; coin cell lithium; and 9 volt packs. It supports battery chemistry of alkaline or NiMH types for most cells.

The knob selects the cell size and chemistry, then is clicked to start a load test with the appropriate current. The voltage under load is measured, and the display shows "New/Good/Weak/Dead" according to the corresponding voltage threshold. The estimated charge level is displayed, as is the voltage under load.

It is built around an adjustable current sink with a range of 10 uA to 200 mA, controlled by a small ARM Cortex processor that also handles the rotary encoder input and LCD output.

The battery holder is a "BF-2A", found on Banggood. Henrik Jensen (forum user HKJ) put me on to it.

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