Anycubic Mega-S Cura Settings 列印機設定

In order to slice the stl model correctly and use full functions in Cura for my new Anycubic i3 Mega S, I need to modify the settings from the original default settings of "Anycubic i3 Mega" in the "Add Printer" menu. Most of the default settings are incorrect for my new Mega-S, need to be corrected.

Cura 新增列印機的選單中,有個現成的設定,但是裡面的設定不對,需要改動。選用多模型各別完成列印 (One at a Time) 的功能(在列印順序,Print Sequence 選項),設定錯誤,會造成模型撞機,擺放會造成撞機的狀況,Cura 會自動警告,而且不會執行切片工作。

Print Sequence selection in Cura

Anycubic Mega mainboard pinout 3D列印機主板腳位

I've used my first 3D printer, Dreamaker, for more than 5 years. After upgraded the firmware to Marlin 2.x.x for weeks, the power supply was damaged last week. Luckily, I found the same 24V 10A power supply from a Taiwanese Shopee seller, and it was repaired. However, there are still some small issues left, such as noisy fan, dirty bearing, wore rod sleeve, dirty bearing... It needs overhaul, although it will be a nightmare..., when I cannot forget how it was assembled by my hands. Honestly speaking,  a Ultimaker-like 3D printer is not really good design for maintenance.
Buying a new 3D printer was planed in my mind for a period due to the above reasons. Last week, I purchased a new 3D printer, Anycubic i3 Mega-S, which is a Prusa i3-like 3D printer with wonderful price. There are many Youtuber reviews as well as the printed samples, so, I selected this one as my second 3D printer.
Anycubic i3 Mega

用 Arduino 寫 NodeMCU V3 的 Blink 程式但 LED 不會閃

NodeMCU 是一款基於 ESP-12E WiFi 無線微控制器的開發板,本身已經內建了USB To TTL 晶片,因此在開發的時候,直接連接板子上的 Micro USB 接頭到電腦,就可以直接燒寫,而且支援 Arduino IDE 開發環境,對於原本就熟悉 Arduino 的開發者來說,拿到就可以直接上手。
拍賣網上,可以找到好幾款不同版本的 NodeMCU,價格不一。我買到的這個版本,叫做「NodeMCU V3 Lua WiFi 開發板」,不到 NT$70 就能買到(作為數位 I/O 控制,你說,這個價格,要我選擇 Arduino Nano 還是它?)。

台股理財行事曆

[2022.01.02]

下週新年開市後的行事曆很熱鬧,包含多家增資上市,以及股東會、法說會。

增資:4542科嶠, 2609陽明, 2327 國巨, 5608四維航, 6414樺漢

除權息:3680家登, 5287數字, 6488環球晶

新股掛牌:6691 洋基工程, 6840 東研信超-新, 3308聯德(減資), 1438三地開發(增資), 3592瑞鼎

中止掛牌:2456奇力新

法說會:8454富邦媒, 2308台達電, 1590 亞德客-KY, 2497怡利電, 8299群聯, 8454富邦媒

股東會:1785光洋科, 6414樺漢, 6130 星寶國際

ATtiny85 的 DigiSpark山寨可插拔開發編程板

在蝦皮購買電子零件的時候,意外發現這個小工具,上面有 USB 插槽供電、連線電腦,以及 8-DIP 的IC插槽,可以安插 ATtiny 85/45/25 這幾種的8隻腳的MCU,而且旁邊還有引出8支排針,看起來很方便,價錢也超便宜,就順便買了。 
DigiSpark 山寨可插拔開發板
原本以為有了這個工具,可以用USB來編程測試,邊寫邊試,完成後可以直接把 IC 拔起來,焊上去麵包板、PCB板就能用了,以後還可以當燒錄器重複燒錄,這樣豈不太方便了?
買來後仔細看一下電路板,才發現不是這麼一回事,不但板子上沒有看到任何 USB 控制 IC,裝上 ATtiny85 連接 USB之後,電腦根本認不到這片板子。

Install Marlin 2.0.x to A 3DYMY RAMPS 1.4 Plus Controller

I bought a 3D printer, Dreamaker, from a Chinese company in Taobao some year ago. It came with a DIY kit with a 3DYMY RAMPS 1.4 Plus controller board. It surprised me with its printing quality and performance, as well as the US$290 price (~NT$8700). After years goes, it still works pretty good without problems, except the getting worse finishing quality due to the nozzle wear. After replaced it with a new cheap $0.5 nozzle from a Taiwanese supplier, it looks better, and I've just cease my desire of buying a new printer. But I did expected to upgrade it with some new fancy functions, and actually I can take this risk now even I screwing it up finally, because I can have good reason to buy a new one then :)

替 Arduino Nano 開無線外掛 (一) 接一片ESP-01

Arduino Nano 是一片蠻理想的 MCU,功能跟 Arduino Uno 一樣多,面積、體積卻小很多,是開發物連網應用、實踐一些有趣想法的好工具。美中不足的是,它沒有無線功能,不能實現遠端監控。直覺的想法,是把手上現成的 ESP8266模組,ESP-01 ,接上 Arduion Nano,弄成像下圖的架構,這樣就可以接上無線路由器,透過家裡的ADSL實現遠端控制了,甚至架一個有資料庫的小伺服器 (Raspberry+SQLite):

跟早年利用市話的複頻電話信號 (DTMF) 的音調,透過一個解碼器,從遠端撥電話,來控制家裡某個東西的裝置。這樣就能在家裡以外的地方,從遠端對 Nano 下命令,或者讓  Nano蒐集一些感測器的資料回來,甚至更進一步存進去資料庫。

當然,買一片 NodeMcu 比較快,不過手頭現成的東西,可以物盡其用,並順便研究一下 ESP8266 的功能。