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Using Euro coins as weights (2004)
(www.rubinghscience.org)
180 points
Tomte
| 1 comments |
20 Oct 24 10:18 UTC
|
HN request time: 0.318s
|
source
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rchowe
◴[
20 Oct 24 12:11 UTC
]
No.
41894824
[source]
▶
>>41894359 (OP)
#
I built a computer vision device that used the top-down area of a penny as a calibration standard. Coins are useful, easy-to-get items that have relatively tight manufacturing tolerances.
replies(2):
>>41894944
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>>41895122
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cassepipe
◴[
20 Oct 24 12:35 UTC
]
No.
41894944
[source]
▶
>>41894824
#
What about wear ? Were they only new coins ?
replies(3):
>>41894957
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>>41895107
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>>41895171
#
Retric
◴[
20 Oct 24 12:37 UTC
]
No.
41894957
[source]
▶
>>41894944
#
I’ve never seen significant ware on a coin in circulation.
Have you?
replies(4):
>>41895028
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>>41895428
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>>41897412
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>>41898161
#
1.
xboxnolifes
◴[
20 Oct 24 18:24 UTC
]
No.
41897412
[source]
▶
>>41894957
#
I have coins that originally had milled edges that are now completely smooth.
ID:
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