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| Best CHEAP LCR meter for small capacitors and inductors? |
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| iMo:
--- Quote from: pqass on November 23, 2022, 02:35:16 am ---I know you're probably not looking for a DIY LC meter now, but in case you've hit a wall, consider the LC-meter project below (or at least the oscillator part). I'm currently implementing the LC+LM311 oscillator [on perf-board] just to validate the approach before committing further. --- End quote --- I built that famous LC meter myself some 20y back, wrote my own fw at that time. It works great.. The lowest C and L values are measured at something like 500-700kHz frequency. PS: I would definitely use a relay with the 1n reference capacitor (not the npn transistor as you do).. PPS: And do not forget the "Null" button where you measure the L or C of the probe wires before the actual measurement :D |
| ranchero:
Just ordered ET432 with Kelvin clip while Black Friday sale is going on (about $130US with all discounts). Will compare with ET-5000 when I will receive it. |
| hgjdwx:
LQ-9101 is better than DE-5000 |
| ledtester:
About the LM311-based LC meter... I found another design which uses a 74HCU04D instead of the LM311: https://www.pcbway.com/project/shareproject/LC_meter_of_using_the_franclin_oscillator_9b1ebd81.html The description there mentions a "Dr. Hegewald" and I was able to find this discrete LC-tank exciter circuit credited to him: https://home.kpn.nl/a.van.waarde/lc.htm |
| mawyatt:
Here's a post on using a cheap SMD Fixture connected to the DE-5000, well more kludged that "connected" ::) Please note the entire thread and the earlier reference SMD 4.7pF cap used with the two SMD Fixtures and the Lab Grade LCR Meters for measurements. https://www.eevblog.com/forum/testgear/cheap-smd-lcr-fixture-the-good-bad-and-ugly!/ Best and Happy Thanksgiving!! |
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