一颗电容导致的血案
这一颗电容导致ADC读取电压数值更新慢了超过100ms,导致USB-PD切电压总是超时,花了两周摸鱼时间改代码怎么调都没用,最后还是硬件问题(
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Soybean (soybean@mastodon.ktachibana.party)'s status on Saturday, 30-Mar-2024 21:17:00 JST Soybean
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Roy Tam (roytam1@miniwa.moe)'s status on Saturday, 30-Mar-2024 21:16:59 JST Roy Tam
@Soybean 來問點別的,現在的ATX電源都是以12V為主,能不能在當中加降壓電路來提高5V和3.3V的輸出? -
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Roy Tam (roytam1@miniwa.moe)'s status on Saturday, 30-Mar-2024 21:56:20 JST Roy Tam
@Soybean 所以像這樣是沒問題的?(下圖僅作示意用)
220V--->PSU內各種轉換-+->12V-->自己的降壓板-->3.3V&5V-+->高3.3V&5V需求設備-->GND | | +->3.3V-------------------------+ +->5V---------------------------+ -
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Soybean (soybean@mastodon.ktachibana.party)'s status on Saturday, 30-Mar-2024 21:56:21 JST Soybean
@roytam1 现在ATX电源的5V和3.3V不都是一块双路buck子板出的吗,再加一块板当然不影响
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Roy Tam (roytam1@miniwa.moe)'s status on Sunday, 31-Mar-2024 00:29:39 JST Roy Tam
@Soybean 對啊,市面沒看到類似的板子我就知道難度高了… -
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Soybean (soybean@mastodon.ktachibana.party)'s status on Sunday, 31-Mar-2024 00:29:40 JST Soybean
@roytam1 emmmmm您要怎么做这个降压板是个大问题
PC的供电的特点是高瞬态,强调响应速度,comp通常都拉很高(尤其是fc),不是专门干这个活的模块很容易硬盘都转不起来,曾经试制过几个,反复算参数测瞬态搞到最后脑壳疼
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