Beeper on programmable resistance - Page 1
Forum section: electronics / testgear

author: arduic
author_rank: Contributor
timestamp: January 18, 2025, 07:05:43 am
content: There have been times in the lab where I've been looking for a set resistance on a pcb (say 10k). I would love a meter that beeps like a continuity check but for a programmable resistance so I can quickly check for a variety of values. Does such a piece of equipment exist? Bonus points if the equipment can beep on other things like voltage.

author: Someone
author_rank: Super Contributor
timestamp: January 18, 2025, 07:38:21 am
content: There are some multimeters with that sort of open ended programmability which can be used for "canned" test procedures:https://www.tek.com/en/solutions/application/test-automation/tsp-for-test-automationhttps://community.element14.com/technologies/test-and-measurement/b/blog/posts/keithley-dmm6500-software-control-options-pt-2---test-commands-with-communicator

author: 2N3055
author_rank: Super Contributor
timestamp: January 18, 2025, 11:20:05 am
content: There are many meters where you can set threshold for continuity.Also there are meters that have pass/fail function where you set limits and meter signals Ok/not Ok

author: Aldo22
author_rank: Super Contributor
timestamp: January 18, 2025, 01:50:32 pm
content: Quote from: 2N3055 on January 18, 2025, 11:20:05 am“Pass/fail” gave me an idea.I wanted to see if I could do this with my cheapie scope.For measuring 10k I used a 100R “shunt” resistor.Then put 1VDC on it.Since the scope beeps at a pass (or fail), it actually works.The accuracy is not very high, but that is clear.With Math Div and Track Cursors I managed to display the value of the resistor (AY or BY, V = kΩ).Figure 1 shows the 10k resistor (pass).Figure 2 shows a 5.1k resistor (fail).This is of course very impractical, but it works.Sorry for the disturbance! I'm just playing.

author: arduic
author_rank: Contributor
timestamp: January 18, 2025, 02:41:49 pm
content: Hmmm guess I should have specified. I was really hoping for a portable meter. Bench top would work but is not ideal given how far I sometimes need to move during testing.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: January 18, 2025, 03:57:06 pm
content: most of the cheap portable milliohm meters (many labelled as batterytester) have an adjustable pass/fail-mode.Like the AC or DC models from Yaorea YR1030/35 (AC) or YR2050 (DC) same with the models from Fnirsi HRM10. (prices from 20 to 40 bucks)Havent tested them for sorting purposes for passive components, and to what extent they need a voltage, as the main use case for a few of the models is batteries.

author: arduic
author_rank: Contributor
timestamp: January 18, 2025, 06:31:55 pm
content: Most of those only work up to a few hundred ohms so they won't work but clever idea. It's often things like checking for 10Kohms at multiple locations on a PCB.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: January 19, 2025, 12:22:03 am
content: Your right..10K gonna be a challenge ..even though a YR2050 got a dedicated 1K range (120.000 count) it will max out at [1200.00Ohm] so 10K no dice.

author: ledtester
author_rank: Super Contributor
timestamp: January 19, 2025, 12:51:27 am
content: The DE-5000 LCR meter has a pass/fail mode (which they call sorting). You can set the target value and tolerance from one of: ±0.25% ±0.5%, ±1%, ±2%,±5%, ±10%, ±20%, and -20%+80%.And it will beep when a component passes.

author: shabaz
author_rank: Frequent Contributor
timestamp: January 19, 2025, 03:12:38 am
content: One other portable option, requires a tiny bit of coding though, would be to get a Bluetooth enabled Multimeter. Then it's possible to add all manner of custom functions to run from a mobile phone.Example of a low-cost Bluetooth meter here (the code is on GitHub if anyone wanted to add a custom feature):https://youtu.be/vf-02j6GisY