Merge branch 'master' of GIT-ENBEWE:eNBeWe.de/Blog
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commit
11403ee95c
4 changed files with 80 additions and 1 deletions
24
config.toml
24
config.toml
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# Main page title
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title = "eNBeWe.de"
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# Main base url
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baseURL = "https://blog.enbewe.de/"
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# Enable default menu
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# sectionPagesMenu = "main"
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# Privacy Settings
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[privacy.disqus]
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disable = true
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[privacy.googleAnalytics]
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disable = true
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[privacy.instagram]
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disable = true
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[privacy.twitter]
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disable = false
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enableDNT = true
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simple = false
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[privacy.vimeo]
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disable = false
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simple = true
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[privacy.youtube]
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disable = false
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privacyEnhanced = true
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[Author]
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name = "eNBeWe"
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# bio = "John Doe's true identity is unknown. Maybe he is a successful blogger or writer. Nobody knows it."
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# avatar = "img/avatar.png"
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[Params]
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# Subtitle of your site. Used in site header
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subtitle = "Coding, Life and more ..."
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description = "eNBeWe.de - Coding, Life and more ..."
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# Enable OpenGraph if true
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opengraph = true
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opengraph = false
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# Show "Read more" button in list if true
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readmore = false
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57
content/posts/2018-07-10-Saike-858DPP-Block-Diagram.md
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content/posts/2018-07-10-Saike-858DPP-Block-Diagram.md
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---
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title: "Saike 858D++ - First Block Diagram"
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date: 2018-07-10T10:45:00+02:00
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author: eNBeWe
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type: post
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categories:
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- Allgemein
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- Bastelkram
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tags:
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- 858D
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- DIY
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- Arduino
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---
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After a short break, here is the first part about the redesign of the Saike 858D rework station ([Overview][1]).
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Let's talk about a rough block diagram for the new design.
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<!--more-->
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[![Saike 858D++ Block Diagram](/posts/images/858D/Concept-New-Design_V1.png)](/posts/images/858D/Concept-New-Design_V1-big.png)
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Let's have a look at the general structure and first follow the path of the power supplies.
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Twe build a mains powered device so we start with that at the top left.
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The mains power is fed into the heater control circuit as well as a 24V switch mode power supply,
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which I will use to replace the transformer.
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The 24V power supply is connected to the fan control circuit and another switch mode supply,
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this time providing a 5V rail.
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The 5V supply is used for an Arduino board,
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which will be plugged on the main PCB. I have not yet decided which model I want to use,
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but it will probably be one of the Pro Micro or Nano boards I have lying around.
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Additionally, the 5V supply is used for the other logic level components,
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like the display and the sensors.
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The Arduino is connected to the heater and fan control circuits,
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both regulated through some form of PWM.
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The heater control will use more or less the same design as the original,
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regulating the heater through a optocoupled triac.
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The fan control will use regular PWM to switch a power mosfet that
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can in turn regulate the fan supply.
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Additionally, there will be a form of monitoring of the fan speed.
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I am currently pondering which way I want to go there.
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The display will be replaced by two 7-segment displays with 4 digits each.
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The displays are controlled by a MAX7219 IC,
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which is connected to the Arduino through SPI.
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The sensor inputs from the handle sensor and the thermocouple
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are fed into the Arduino directly and are used in the control loop.
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That's about it. There is still some uncertainty about some desin points,
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but I am feeling confident that this should, at least roughly, work.
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[1]: {{<relref "2018-06-20-Reverse-Engineer-a-Saike-858D.md">}}
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content/posts/images/858D/Concept-New-Design_V1-big.png
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content/posts/images/858D/Concept-New-Design_V1.png
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