tag:blogger.com,1999:blog-7057630065429233264.post5375183910955081532..comments2024-03-28T10:51:44.181+01:00Comments on Paul's DIY electronics blog: Building a Kelvin-Varley Dividerpaulvhttp://www.blogger.com/profile/11421488581167758443noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-7057630065429233264.post-64078034273391346492020-01-22T08:50:05.543+01:002020-01-22T08:50:05.543+01:00Dear Unknown,
Your method is correct, mine isn'...Dear Unknown,<br />Your method is correct, mine isn't. It just worked out that way with the tolerances and precision of my equipment.<br />Thanks for pointing this out, I will change the posting.<br /><br />Paulvpaulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-81598358163845674892020-01-21T23:34:36.948+01:002020-01-21T23:34:36.948+01:00Thanks for taking the time to write this interesti...Thanks for taking the time to write this interesting article, however I have one question regarding the following:<br /><br />"The KVD decades were set at minimum subtraction or division with 9-9-9-9-9-10. My DMM showed 10,007V at the output which is the best it can do.<br /><br />I then "subtracted" the "excess" of 6,73 millivolt by changing the setting of the KVD from 9-9-9-9-9-10 to 9-9-9-4-3-7 and low and behold, the output of the DVM now showed 10.000V."<br /><br />Can you please explain your methodology here?<br /><br />My assumption would be that the "correct" process to obtain 10.00000V (+/- error margin of course) from a 10.00673V reference would be to set the KVM settings to:<br /><br />10.00000 / 10.00673 = 0.999327 = 9-9-9-3-2-7<br /><br />This sets the divider ratio to 0.999327 and the output voltage would therefore be:<br /><br />10.00673 * 0.999327 = 9.99999547071<br />Anonymoushttps://www.blogger.com/profile/14952926545531173101noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-3131561361998277652019-01-09T03:52:42.026+01:002019-01-09T03:52:42.026+01:00I'm going to reread your article then dig out ...I'm going to reread your article then dig out my zm-4b resistance bridge and voltage reference. Anonymoushttps://www.blogger.com/profile/02595346667175597546noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-20518386116211589372018-11-18T16:05:04.231+01:002018-11-18T16:05:04.231+01:00Hi Tommy, from what I've learned in the proces...Hi Tommy, from what I've learned in the process, you can use any value resistors for the decades, as long as they adhere to the ratio's. In my opinion, and I've done that myself, it's easier to purchase a lot of the same values and then sort them by closely matching values. I suspect that's where the equal values for all of them come from.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-65256127742137669812018-11-18T15:09:14.569+01:002018-11-18T15:09:14.569+01:00Im currently trying to homwbrew my own kvd. I have...Im currently trying to homwbrew my own kvd. I have a question as far as resistor values as im currently matching 10.2k resistors for the first decade. I have read that i can use same value for all decades or go no lower than 1/5 of resistor value for subsequent decades. I see most diagrams are divided in 1/5 increments so when i run out of matched 10.2k would anything stop me from using maybe a random value above 2.04k resistor?Tommyhttps://www.blogger.com/profile/08240705877059136623noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-59370757932237965452018-09-10T15:15:25.980+02:002018-09-10T15:15:25.980+02:00Ohm's Law in essence says the immunity of some...<a href="https://play.google.com/store/apps/details?id=com.ohms.law.calculator&hl=en_US" rel="nofollow">Ohm's Law</a> in essence says the immunity of some factor (usually a resistor) is corresponding to this voltage fell across the resistor divided from the existing proceeding right through it.This regulation tends to make it not too difficult to get certainly one of 3 principles: voltage along a resistance, so the immunity value , or even so the current flowing through the immunity.Patrice Britthttps://www.blogger.com/profile/04342306232028095136noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-73137353821441772312018-08-16T12:52:25.192+02:002018-08-16T12:52:25.192+02:00Electrical immunity in a D.C. circuit has been qua...Electrical immunity in a D.C. circuit has been quantified in OHMS (Ω) along with also a substance will possess a worth of one ohm when a potential of one volt produces a current of one ampere. Then Ohms may also be considered as volts/amps. The more resistance a materials or circuit owns the current will stream.Try this <a href="https://play.google.com/store/apps/details?id=com.ohms.law.calculator" rel="nofollow">ohm</a> law calculator app through which you can easily came to know about the calculations of voltage,current and resistance.Romen Whitehttps://www.blogger.com/profile/06510938812488601309noreply@blogger.com