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嗨,我用MCP42010。它的工作正常,但我想知道,我怎样才能提高同样的分辨率。我想把这个壶换成1欧姆。请帮忙。
以上来自于百度翻译 以下为原文 hi, curently i am using mcp42010. its working properly but i want to know , how i can increase the resolution of same. i want to vary the pot by 1ohm. please help thanks |
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7个回答
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你看过数据表了吗?总阻力除以步数是…?如果阻力只是其他变量的代理,那么你可以通过调节刮水器的输出来做你想要的。不知道你想做什么,很难提供任何帮助。
以上来自于百度翻译 以下为原文 Have you read the data sheet? Total resistance divided by number of steps is...? If the resistance is just a proxy for some other variable then you may be able to do what you want by conditioning the wiper output. Without knowing what you are trying to do, it's difficult to offer any help. |
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我知道每一罐的步骤是255。但是如何进行串联和并联组合,这样我可以把锅换成1或10欧姆。
以上来自于百度翻译 以下为原文 i know the steps are 255 for each pot. but how make the series and parallel combination so that i can vary pot by 1 or 10 ohms. |
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可能是好的,我想知道,有时也不确定你能怎么做…
以上来自于百度翻译 以下为原文 Could be nice, I wondered that as well at times Not sure how you can do... |
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可能不太实用:串联连接会增加最大值BOT而不影响分辨率,并联会增加有效分辨率,但会非常非线性。通常,改变电路中的增益以补偿步长和使用较大的最大值(不同部分)或串联连接更简单。
以上来自于百度翻译 以下为原文 Probably not very practical: series connection will increase maximum value bot not affect resolution, parallel connection will increase effective resolution but will be VERY non-linear. Usually it is simpler to change the gain in the circuit somewhere to compensate for the step size and use a larger max value (different part) or a series connection. |
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只有并联连接会减小有效的步长,但正如杰克所说的那样,这是一种高度非线性的方式。我已经使用电阻串联在“上面”和/或“下面”一个锅上,以降低分压器的控制范围,但这并不影响壶的步长。如果你把一个1K电阻与Pb和PW并联,例如,在低端的步骤是38欧姆,而在高端步骤是0.3OHMs。从2到1欧姆之间会有一个从88到135的甜点,最终取决于应用电路和要求,在这一点上是神秘的。
以上来自于百度翻译 以下为原文 Only a parallel connection will reduce the effective step size, but as Jack said in a highly non-linear fashion. I've used resistors in series "above" and/or "below" a pot to reduce the control range for a voltage divider, but that doesn't affect the pot step size. If you put a 1K resistor in parallel with PB and PW, for instance, at the low end steps are 38 ohms while at the high end steps are 0.3ohms. There will be a sweet spot from to 88 to 135 where steps are 2 to 1 ohm. Ultimately it all depends on the application circuit and requirements, which are mysterious at this point. |
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我可以想出一个10K锅和1K一个串联:但是接地可能是个问题,然后我不确定微芯片或其他品牌是否如此)重新安排电路的其余部分,让“更大的步骤”仍然是一个更容易的解决方案,对我来说也是如此。
以上来自于百度翻译 以下为原文 I could think of a 10K Pot in series with a 1K one: but grounding could be an issue, and then am not sure if Microchip or other brands make such of them) Rearranging the rest of the circuit to allow for "bigger steps" remains an easier solution, for me too. |
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是的,如果你能获得一个总价值足够小的版本,串联可以增加有效的分辨率。模拟设备使一系列(AD840X)可用在1K,10K,50K和100K的值,串行接口,单,双或四边形。只有1K设备我知道。
以上来自于百度翻译 以下为原文 Yep, series connection could increase effective resolution if you can obtain a version with a small enough total value. Analog Devices makes a series (AD840x) available in 1K, 10K, 50k AND 100k values, serial interface, single, duals or quads. Only 1K device I am aware of. |
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