![\"\"\/](\"https:\/\/www.block.tw\/blog\/wp-content\/uploads\/arduino\/unoCapTest\/CapTest.svg\")
<\/figure>\n<\/div>\n\n\n\u539f\u7406<\/h2>\n\n\n\n
\u5229\u7528\u96fb\u5bb9\u5145\u96fb\u6642\u9593\u5e38\u6578 \u03c4=R\u00d7C\uff0c\u5229\u7528 arduino millis() \u8207 micros() \u8a08\u6642\u529f\u80fd\uff0c\u8a08\u7b97\u591a\u4e45\u6703\u5145\u96fb\u52301\u500b\u6642\u9593\u5e38\u6578 (\u5145\u96fb\u5230 0.632 * \u96fb\u58d3\u6700\u5927\u503c ) \u3002 <\/p>\n\n\n\n \u5f85\u6e2c\u96fb\u5bb9\u5f9e2200\u03bcF ~ 220pF \u90fd\u80fd\u6e2c\u91cf\uff0c\u5c0f\u65bc100pF\u6e2c\u91cf\u6703\u6709\u9ede\u554f\u984c\uff0c\u56e0\u70ba\u7528\u9eb5\u5305\u677f\u88fd\u4f5c\uff0c\u7576\u6c92\u6709\u5f85\u6e2c\u96fb\u5bb9\u6642\uff0c\u6e2c\u51fa\u7684\u96fb\u5bb9\u503c\u6703\u6709 40\u5e7epF\uff0c\u56e0\u70ba\u6307\u4ee4\u57f7\u884c\u672c\u8eab\u5c31\u9700\u8981\u6642\u9593\u3002\u56e0\u6b64\u6c7a\u5b9a\u4fee\u6b63\u7a0b\u5f0f\uff0c\u6e2c\u5f97\u7684\u57f7\u884c\u6642\u9593\u6703\u6e1b\u6389 420\u03bcS \u4f86\u4fee\u6b63\u8aa4\u5dee\u3002 \u7bc4\u4f8b\u7a0b\u5f0f\u662f\u5c07\u96fb\u5bb9\u6e2c\u91cf\u7d50\u679c\u50b3\u56de\u96fb\u8166\uff0c\u8acb\u7d50\u5408 OLED \u5be6\u7fd2\uff0c\u5c07\u6e2c\u91cf\u96fb\u5bb9\u5927\u5c0f\u986f\u793a\u5728 OLED \u4e0a\u3002\u7a0b\u5f0f\u4e2d\u4e26\u6c92\u6709\u5c0d\u7a7a\u63a5\uff0c\u6216\u6e2c\u8a66\u7aef\u76f4\u63a5\u77ed\u8def\u505a\u5224\u65b7\uff0c\u8acb\u81ea\u884c\u52a0\u4e0a\u5224\u65b7\uff08\u7576\u5f85\u6e2c\u7aef\u76f4\u63a5\u77ed\u8def\u6642\uff0c\u96fb\u58d3\u662f\u7121\u6cd5\u5230\u9054\u5145\u96fb\u96fb\u58d3\uff0c\u6240\u4ee5\u7576\u6e2c\u8a66\u6642\u9593\u8d85\u904e\u591a\u4e45\u4e4b\u5f8c\uff0c\u5c31\u53ef\u4ee5\u5224\u5b9a\u5f85\u6e2c\u7aef\u77ed\u8def<\/span>\uff09<\/p>\n\n\n\n micros()<\/a> Arduino \u7c21\u4ecb<\/a> \u99dd\u5cf0\u5f0f\u547d\u540d\u6cd5<\/a> Arduino \u9032\u5236\u8868\u793a<\/a> Arduino for \u8ff4\u5708<\/a> Arduino \u6578\u4f4dI\/O\u51fd\u5f0f<\/a> Arduino \u8f38\u51fa\u5be6\u7fd2<\/a>(\u55ae\u71c8\u9583\u720d) \u8a2d\u5099\u8207\u6750\u6599 \u500b\u4eba\u96fb\u8166 \u00d7 1arduino Uno \u00d7 1OLED 128*64 \u00d7 1PB \u6309\u9215 \u00d7 11\/… \u8a2d\u5099\u8207\u6750\u6599 \u500b\u4eba\u96fb\u8166 \u00d7 1arduino Uno \u00d7 1OLED 128*64 \u00d7 1PB \u6309\u9215 \u00d7 11\/4W 1k\u03a9\u00d7 11\/4W 1M\u03a9\u00d7 11\/4W 10M\u03a9\u00d7 1\u9023\u63a5\u7dda \u82e5\u5e72 \u5be6\u9ad4\u63a5\u7dda\u5716 …<\/p>\n","category_list":"Arduino \u5be6\u7fd2<\/a>, \u5fae\u8655\u7406\u6a5f<\/a>","author_info":{"name":"mcu","url":"https:\/\/www.block.tw\/blog\/author\/mcu\/"},"comments_num":"0 comments","featured_image_urls_v2":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":"","post-thumbnail":"","mesmerize-full-hd":""},"post_excerpt_stackable_v2":" \u8a2d\u5099\u8207\u6750\u6599 \u500b\u4eba\u96fb\u8166 \u00d7 1arduino Uno \u00d7 1OLED 128*64 \u00d7 1PB \u6309\u9215 \u00d7 11\/4W 1k\u03a9\u00d7 11\/4W 1M\u03a9\u00d7 11\/4W 10M\u03a9\u00d7 1\u9023\u63a5\u7dda \u82e5\u5e72 \u5be6\u9ad4\u63a5\u7dda\u5716 …<\/p>\n","category_list_v2":"Arduino \u5be6\u7fd2<\/a>, \u5fae\u8655\u7406\u6a5f<\/a>","author_info_v2":{"name":"mcu","url":"https:\/\/www.block.tw\/blog\/author\/mcu\/"},"comments_num_v2":"0 comments","_links":{"self":[{"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/posts\/4906","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/comments?post=4906"}],"version-history":[{"count":14,"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/posts\/4906\/revisions"}],"predecessor-version":[{"id":4939,"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/posts\/4906\/revisions\/4939"}],"wp:attachment":[{"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/media?parent=4906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/categories?post=4906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.block.tw\/blog\/wp-json\/wp\/v2\/tags?post=4906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
1k\u03a9\u5145\u96fb\uff1a<\/span>
\u8a08\u6642\u662f\u7528 millis()<\/span> \uff0c\u55ae\u4f4d\u662f ms
\u03c4 = 1k \u00d7 C
C = \u03c4 \/ 1k
C = \u03c4 \u03bcF
1M\u03a9\u5145\u96fb\uff1a <\/span>
\u8a08\u6642\u662f\u7528 micros()<\/span> \uff0c\u55ae\u4f4d\u662f =\u03bcs
\u03c4 = 1M \u00d7 C
C = \u03c4 \/ 1M
C = \u03c4 pF
10M\u03a9\u5145\u96fb\uff1a<\/span>
\u8a08\u6642\u662f\u7528 micros()<\/span> \uff0c\u55ae\u4f4d\u662f =\u03bcs
\u03c4 = 10M \u00d7 C
C = \u03c4 \/ 10M
C = \u03c4\/10 pF
<\/p>\n\n\n\n\u53c3\u8003\u7a0b\u5f0f<\/h2>\n\n\n\n
\/*\n * arduino \u96fb\u5bb9\u6e2c\u8a66\u7a0b\u5f0f\n * \n *\/\nint Out1k = 12; \/\/1k\u96fb\u963b\u7684\u5145\u96fb\u8173\nint Out1M = 11; \/\/1M\u96fb\u963b\u7684\u5145\u96fb\u8173\nint Out10M = 10; \/\/10M\u96fb\u963b\u7684\u5145\u96fb\u8173\nint ReadPin = A0; \/\/\u985e\u6bd4\u8b80\u53d6\u96fb\u5bb9\u96fb\u58d3\u8173\u4f4d\nint PB=9; \/\/\u6309\u9215\u958b\u95dc\n\nunsigned long runTime; \/\/\u8a08\u7b97\u57f7\u884c\u6642\u9593\nbyte step=12; \/\/\u57f7\u884c\u72c0\u614b 12 \u4e0d\u57f7\u884c\n\nvoid setup() {\n \n pinMode(PB,INPUT_PULLUP);\n pinMode(ReadPin,INPUT);\n \n \/\/\u958b\u555f\u4e32\u4f8b\u50b3\u8f38\n Serial.begin(9600);\n}\n\nvoid loop() { \n \n \/\/\u6aa2\u6e2c\u662f\u5426\u6309\u9215\uff0c\u5982\u679c\u6309\u4e0b\u5c31\u53ef\u4ee5\u6e2c\u91cf\n if(!digitalRead(PB)){\n \/\/\u958b\u59cb\u6e2c\u91cf\n step=0;\n }\n \n switch(step){\n case 0:\n \/\/\u5145\u96fb\u524d\u5148\u5c07\u96fb\u5bb9\u96fb\u58d3\u653e\u96fb \n\n \/\/Out1M Out1M \u9ad8\u7d44\u614b\uff0c\u4e0d\u5f71\u97ff Out1k \u5145\u96fb \n pinMode(Out1M,INPUT);\n pinMode(Out10M,INPUT);\n \n pinMode(Out1k,OUTPUT); \n digitalWrite(Out1k,LOW);\n step=1;\n break;\n case 1:\n \/\/\u6aa2\u6e2c\u653e\u96fb\u662f\u5426\u5b8c\u6210\n if(analogRead(ReadPin)<35){\n step=2;\n } \n break; \n case 2: \n \/\/\u7528 1k\u03a9 \u958b\u59cb\u5145\u96fb\n digitalWrite(Out1k,HIGH);\n runTime = millis(); \n step = 3;\n break;\n case 3:\n \/\/\u6aa2\u6e2c\u5145\u96fb\u96fb\u58d3 1023*0.632 63.2% \u662f1\u500b\u5145\u96fb\u6642\u9593\u5e38\u6578\n if(analogRead(ReadPin)>646){ \n runTime = millis()-runTime;\n if(runTime>2){\n \/\/\u6e2c\u91cf\u7d50\u675f\n Serial.print(runTime); \n Serial.println(\"\u03bcF\"); \n step=12; \n digitalWrite(Out1k,LOW); \n }else{\n \/\/\u6578\u503c\u592a\u4f4e\uff0c\u7528 1M \u96fb\u963b\u4f86\u5145\u96fb\n step=4; \n } \n } \n break; \n case 4:\n \/\/\u5145\u96fb\u524d\u5148\u5c07\u96fb\u5bb9\u96fb\u58d3\u653e\u96fb \n pinMode(Out1k,OUTPUT); \n digitalWrite(Out1k,LOW);\n step=5;\n break;\n case 5:\n \/\/\u6aa2\u6e2c\u653e\u96fb\u662f\u5426\u5b8c\u6210\n if(analogRead(ReadPin)<35){\n step=6;\n } \n break; \n case 6: \n \/\/Out1k \u9ad8\u963b\u614b\uff0c\u4e0d\u5f71\u97ff Out1M \u5145\u96fb\n pinMode(Out1k,INPUT); \n \n pinMode(Out1M,OUTPUT); \n digitalWrite(Out1M,HIGH);\n runTime = micros(); \n step = 7;\n break;\n case 7:\n \/\/1023*0.632=646 \n if(analogRead(ReadPin)>646){ \n runTime = micros()-runTime-420; \n if(runTime>1000){ \n \/\/\u6e2c\u91cf\u7d50\u675f\n Serial.print(runTime); \n Serial.println(\"pF\"); \n digitalWrite(Out1M,LOW);\n step=12;\n }else{\n \/\/\u6578\u503c\u592a\u4f4e\uff0c\u7528 10M \u96fb\u963b\u4f86\u5145\u96fb\n step=8; \n }\n } \n break;\n \n case 8:\n \/\/\u5145\u96fb\u524d\u5148\u5c07\u96fb\u5bb9\u96fb\u58d3\u653e\u96fb \n pinMode(Out1k,OUTPUT); \n digitalWrite(Out1k,LOW);\n step=9;\n break;\n case 9:\n \/\/\u6aa2\u6e2c\u653e\u96fb\u662f\u5426\u5b8c\u6210\n if(analogRead(ReadPin)<35){\n step=10;\n } \n break; \n case 10: \n \/\/Out1k Out1M \u9ad8\u963b\u614b\uff0c\u4e0d\u5f71\u97ff Out10M \u5145\u96fb\n pinMode(Out1k,INPUT); \n pinMode(Out1M,INPUT); \n pinMode(Out10M,OUTPUT); \n digitalWrite(Out10M,HIGH);\n runTime = micros(); \n step = 11;\n break;\n case 11:\n \/\/1023*0.632=646 \n if(analogRead(ReadPin)>646){ \n runTime = micros()-runTime-420; \n Serial.print(runTime\/10); \n Serial.println(\"pF\"); \n digitalWrite(Out10M,LOW);\n step=12;\n } \n break; \n } \n}<\/code><\/pre>\n\n\n\n\u8f38\u51fa\u756b\u9762<\/h2>\n\n\n
![\"\"\/](\"https:\/\/www.block.tw\/blog\/wp-content\/uploads\/arduino\/unoCapTest\/CapTestOutput.jpg\")
<\/figure>\n<\/div>\n\n\n\u6e2c\u8a66\u7d50\u679c<\/h2>\n\n\n\n
\u4fee\u6b63\u524d\u62ff1\u500b10pF\u7684\u96fb\u5bb9\u5668\u53bb\u6e2c\u91cf\u6642\uff0c\u6e2c\u51fa\u7684\u7d50\u679c\u7d0450\u5e7epF\uff0c\u8aa4\u5dee\u6709\u9ede\u5927\uff0c\u4fee\u6b63\u5f8c\u7d50\u679c\u6bd4\u8f03\u6b63\u5e38\u3002<\/p>\n\n\n\n\u529f\u80fd\u8981\u6c42<\/h2>\n\n\n\n
\u76f8\u95dc\u77e5\u8b58<\/h2>\n\n\n\n
millis()<\/a><\/p>\n\n\n\n
\u6e96\u5099\u4f60\u7684 Arduino \u958b\u767c\u5de5\u5177<\/a>
\u6e96\u5099\u4f60\u7684 ESP12E\/F \u958b\u767c\u5de5\u5177<\/a>
Arduino Uno \u786c\u9ad4<\/a>
Arduino nano \u786c\u9ad4<\/a>
ESP-12F(ESP8266)\u786c\u9ad4<\/a>
Arduino \u7a0b\u5f0f\u8a9e\u6cd5<\/a>
\u532f\u5165 zip \u7a0b\u5f0f\u5eab<\/a>
<\/p><\/div><\/div><\/div>
UART \u4e32\u5217\u901a\u8a0a<\/a>
PWM\u63a7\u5236<\/a>
\u9375\u76e4\u6383\u63cf<\/a>
ThingSpeak \u96f2\u7aef\u8cc7\u6599\u5eab \u5e33\u865f\u7533\u8acb<\/a>
ThingSpeak \u96f2\u7aef\u8cc7\u6599\u5eab \u8a2d\u5b9a<\/a><\/p><\/div><\/div><\/div>
Arduino \u9663\u5217<\/a>
Arduino \u5e38\u6578\u8207\u8b8a\u6578<\/a>
Arduino \u7b97\u6578\u904b\u7b97\u5b50<\/a>
Arduino \u8907\u5408\u904b\u7b97\u5b50<\/a>
Arduino \u5e03\u6797\u904b\u7b97\u5b50<\/a>
Arduino \u6bd4\u8f03\u904b\u7b97\u5b50<\/a>
Arduino IDE \u932f\u8aa4\u8a0a\u606f<\/a><\/p><\/div><\/div><\/div>
Arduino if \u689d\u4ef6\u5224\u65b7<\/a>
Arduino switch \u9078\u64c7\u6307\u4ee4<\/a>
Arduino while \u8ff4\u5708<\/a>
Arduino do while \u8ff4\u5708<\/a><\/p><\/div><\/div><\/div>
Arduino \u985e\u6bd4I\/O\u51fd\u5f0f<\/a>
Arduino \u6642\u9593\u51fd\u5f0f<\/a>
Arduino \u6578\u5b78\u51fd\u5f0f<\/a>
Arduino \u901a\u8a0a\u7269\u4ef6\u51fd\u5f0f<\/a>
Arduino \u767c\u97f3\u51fd\u5f0f<\/a>
Arduino \u81ea\u5b9a\u51fd\u5f0f<\/a><\/p><\/div><\/div><\/div>
Arduino \u8f38\u51fa\u5be6\u7fd2<\/a>(\u8dd1\u99ac\u71c8-\u611a\u516c\u79fb\u5c71)
Arduino \u8f38\u51fa\u5be6\u7fd2<\/a>(\u8dd1\u99ac\u71c8-for\u8ff4\u5708)
Arduino \u6578\u4f4d\u8f38\u5165\u5be6\u7fd2<\/a>
Arduino \u6578\u4f4d\u8f38\u5165\u5be6\u7fd2(INPUT_PULLUP)<\/a>
Arduino \u985e\u6bd4\u8f38\u5165\u5be6\u7fd2<\/a>
Arduino PWM <\/a>\u5be6\u7fd2<\/a> (\u547c\u5438\u71c8)
Arduino PWM \u5be6\u7fd2<\/a> (\u5149\u611f\u61c9\u8abf\u5149\u71c8)
Arduino 8×8 LED Matrix MAX7219 \u5be6\u7fd2<\/a>
Arduino \u7d05\u7da0\u71c8\u5c0f\u7da0\u4eba \u5be6\u7fd2<\/a>
Arduino \u8a08\u6642\u5668 \u5be6\u7fd2<\/a>
Arduino \u97f3\u6a02\u76d2<\/a>
Arduino \u96fb\u5b50\u7434(\u9375\u76e4\u6383\u63cf)<\/a>
Arduino DHT11 \u6eab\u6fd5\u5ea6\u611f\u61c9\u5668<\/a>
Arduino OLED \u986f\u793a<\/a>
Arduino \u8d85\u97f3\u6ce2\u6e2c\u8ddd\u6a21\u7d44 HC-SR04<\/a><\/span>
Arduino \u57f7\u884c\u6642\u9593\u5be6\u7fd2<\/a>
Arduino \u96fb\u5bb9\u6e2c\u8a66\u5668<\/a>
Arduino \u7d05\u5916\u7dda\u63a5\u6536\u5be6\u7fd2<\/a>
Arduino \u7d05\u5916\u7dda\u767c\u5c04\u5be6\u7fd2 EPSON \u6295\u5f71\u6a5f\u63a7\u5236 <\/a>
ESP-12F \u7db2\u8def\u667a\u6167\u958b\u95dc(MQTT)<\/a>
ESP-12F \u96f2\u7aef\u8a18\u9304\u578b K-Type \u6eab\u5ea6\u8a08(MQTT ThingSpeak)<\/a>
ESP-12F \u624b\u6a5f\u96f2\u7aef\u7d05\u5916\u7dda\u63a7\u5236<\/a>
ESP-12F \u7db2\u8def\u96fb\u53f0\u6536\u97f3\u6a5f<\/a>
ESP-12F \u96fb\u5b50\u9f13<\/a><\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"
Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[70,3],"tags":[],"class_list":["post-4906","post","type-post","status-publish","format-standard","hentry","category-internship","category-mcu"],"gutentor_comment":0,"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":"","post-thumbnail":"","mesmerize-full-hd":""},"post_excerpt_stackable":"