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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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