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interfaces:adda [2016/03/29 12:08] – [YL-40 A/D D/A Converter Module] darroninterfaces:adda [2016/03/30 20:40] (current) – darron
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 The YL-40 is a cheap analogue I/O device based on the PCF8591 I2C interface chip. The YL-40 is a cheap analogue I/O device based on the PCF8591 I2C interface chip.
-There is at least one variant of this board not named YL-40 on but instead says+There is at least one variant of this board not named YL-40 on but instead named
 QiFEi on the reverse. QiFEi on the reverse.
  
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 found. found.
  
-^Board ^LDR @ 10lx ^NTC @ 25'C  ^ Earth fault ^ Jumpers | +^Board   ^LDR @ 10lx ^NTC @ 25'C  ^ Earth fault ^ Jumpers | 
-|1     | 10K       | 4K7 / 3977 | No          | RED     |     +|YL-40 #1| 10K       | 4K7 / 3977 | No          | RED     |     
-|2     | 5K        | 6K8 / 3977 | Yes         | BLACK   | +|YL-40 #2| 5K        | 6K8 / 3977 | Yes         | BLACK   | 
-|3     | 10K       | 10K / 3977 | Yes         | NONE    |+|YL-40 #3| 10K       | 10K / 3977 | Yes         | NONE    | 
 +|QiFEi   | 10K       | 4K7        | No          | BLACK   |
  
 As we can see, the components vary, plus there is a massive variation As we can see, the components vary, plus there is a massive variation
-in response for the LDRs so they must be considered unique.+in response for the LDRs and they may be considered unique.
  
-The LDRs are likely to be the GL/PGM 5516 (5K) and 5528 (10K).+The LDRs are likely to be the GL/PGM 5516 (~5K) and 5528 (~10K).
  
 === PCF8591 === === PCF8591 ===