dianyuankongzhiban，caiyongmonikongzhi，shuzidianyuanduiqijianjingduyaoqiugao，qijiandelaohuaduizhibiaojingduyouyingxiang，bingqieshijitiaoshidianluxuyaodafanweilianxutiaojiebufangbian。dajiaDIY時一定不要忽略電阻的重要性，特別是電位器
，關係到電路的穩定精度。

 

一般碳膜電位器溫度係數很大，產生電壓漂移比較大，pcb設計要注意地電位的影響，熱耦合，銅箔載流量和一些信號走線分布電感電容的影響
，手頭好點的器件都用上了，op27，正品lm336jizhun
，wanfenzhiyipeiduidanidianzu
，tandianrong
，caiyongkangtongdianzuzuodianliucaiyang
，caiyongmengtongjingduhuigenghaodian，danshimianwuciguige，kangtonghemengtongwendingxingchabuduo，zhuyaochajushirediandongshi，jiyutonglianjiechuxianwenchahou，kangtongchanshengderediandongshidianyayaobimengtongdaxie，suoyizhelicaiyong2個康銅電阻以降低大電流下產生的溫升。

 

大家DIYdianyuan，yinshoutoutiaojiansuoxianwangwangzhinengjinxingjiandandejingtaizhibiaoceshi
，erdongtaixingnengqueshiyouxiudedianyuandezhongyaozhibiao，daizaitiaozhenglv
，jidangdianyuanjiazaifuzaishidianyahuixiachongranhouhuifu
，xiachongfuduyuexiaohuifushijianyueduanyuehao，erchadianyuankenenghaihuichanshengdianyashangchong，tongshidianyuanshangdianduandianyebunengchuxiandianyashangchong，zheyeshiyixieshejibuhegedianyuandaizaisunhuaifuzaidegenyuan。muqiancaiyongshiboqiceshikaiguanji，junwudianyashangchongwenti
，hengyahengliuqiehuan，hengyadaizai，hengliudaizaiyiwudianyashangchong，wenboceshishoushebeihuanjingsuoxianwufajingqueceshi，kongzaidaizaidoushiyitiaocuxian，dianyaquyangweilediy方便直接設計在pcb接線端子上，10a帶載取樣點測試壓降小於0.1mv。

 

 

  

功率板

 

 

 

 

 

電壓切換板，為了防止電壓切換臨界點繼電器抖動要設計成施密特比較電路。

 

 

目前配上散熱器的組合
，後邊待續。