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mini_flow [2018/12/27 12:50] – yairmini_flow [2018/12/31 12:45] (current) – [test setup] yair
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 +==== what ====
 +ceramic heaters just [[https://www.aliexpress.com/item/12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate-Heating-Element/32686074262.html|arrived]]. PTC is an [[https://en.wikipedia.org/wiki/Heating_element#Polymer_PTC_heating_elements|amazing material]]
 +
 +we are intrested in small reflow ovens for workshops, to remove the need for soldering smd with cheap irons. 
 +
 +mybe call it uBake ?
 +==== test setup ====
 +
 +{{:pasted:20181227-105028.png}}
 +
 +first tested on bench with no heat load.\\
 +it takes 12DCV 5A ramping up\\
 +when it reaches 410C (rated at 400c) it stabilize on 3A
 +this allows for relatively precise ramping using current control. 
 +using a benchtop psu or lm317(?) you can make a very simple reflow profile.\\
 +
 +{{::basic.mp4?700x500|}}
 +
 +placed the ceramic heater on top of a huge copper heatsink (idiot)
 +
 +
 +
 +{{:pasted:20181227-201019.png?400&direct}} {{:pasted:20181227-200604.png?400&direct}}
 +
 +then moved to a more suitable setup
 +
 +{{:2018-12-27_20-54-45_chrome_photo_in_ubake_-_google_photos_-_google_chrome.png?500}} {{:ubake.png?500}}
 +
 +i used microprint 2004p (Sn62 Pb36 Ag2, 20-38 µm (T4)) ({{ ::dsh.745-035.1.pdf |pdf}},{{ :bel.745-035.3.pdf |pdf2}})\\
 +with a claimed melting point of 179°C
 +
 +{{::bake-720p.mp4?700x500|}}
 +
 +{{:rec013_shrt.mp4?700x500|}}
 +
 +
 +==== omg ====
 +{{youtube>aqR4_UoBIzY?medium}}
 +==== to test ====
   * 12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate   * 12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate
     * [[https://www.aliexpress.com/item/12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate-Heating-Element/32686074262.html|aliexpress]]     * [[https://www.aliexpress.com/item/12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate-Heating-Element/32686074262.html|aliexpress]]
 {{:pasted:20181227-104344.png?400}} {{:pasted:20181227-104344.png?400}}
 +
  
  
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 {{:pasted:20181227-104729.png?400}} {{:pasted:20181227-104729.png?400}}
  
 +==== PID ====
  
 +https://electronics.stackexchange.com/questions/215418/smartest-way-to-use-current-limit-using-lm317
 +and polyfuse?