# data[].attributes.body
http://oa.jlu.edu.cn/cache/20133/show193002.html

# data[].attributes.body
按原例子用arduino做一遍，保底。

laser diode driver

code transplant

easyDriver testing

买大功率20欧姆电阻一枚，100欧姆电位器一枚。

写报告啊

# data[].attributes.body
ATmega128

# data[].attributes.attachment_link.title
ATmega128 - 8-bit AVR Microcontrollers - Microcontrollers and Processors

# data[].attributes.body
Apr25/EasyDriver 测试过了，12V的电压会导致电机和芯片严重发热，降到5V可以正常工作，不知道最大稳定电压是多少。激光头太弱了，貌似被又我烧了。

Apr24/EasyDriver到了，电阻买回来了。EasyDriver简单测试了一下虽然没跑起来但是应该问题不大。laser diode driver做完了就是不知道电流是多大。真怕做不完了。

Apr23/下了一天雨，电阻没买成。

Apr22/錢不是白掙的啊，累慘了。EasyDriver拍下來了，後天到。

Apr20/今天LT1121CN8終於到了，小爺還得掙錢去啊買板子啊進度就先暫停兩天吧。

Apr19/小爺我明天去掙錢，掙了錢買EasyDriver。

Apr19/開始碼農。LT1121延期。

Apr18/爲啥windows下和ubuntu下進度不一樣呢？？

Apr17/用arduino簡單測試了一下EasyDriver不好使。煩。

Apr17/木有進度更新好拙計。

Apr13/激光頭的殼斷了，得買一個去。電機排線焊起來太麻煩了。穩壓管還需要一些散件。爭取下週末之前機械部分用arduino跑起來一次。

Apr13/穩壓管問題解決了，大元哥威武！官方網站也有錯誤數據啊你大爺的。

Apr13/ATmega128到了。

Apr12/Easydriver 一塊已經焊完了，沒有測試。

Apr11/Easydriver一塊基本焊完成了，明天把地線和Vcc好好走一下就可以了，兩個V+就用跳線吧。LM317的regulator還是有問題需要修改或者調試，激光二極管的驅動也需要仿真，但是估計激光二極管的等效模型有問題，不測試直接做eLABZ的設計應該也沒有太大問題。

Apr11/還在焊電路不過快完成了，準備換CPU，ATmega128，已經下單走的順豐。LT1121CN8現在途中。

Apr08/焊接電路中

Apr07/芯片處理完了，明天找老師要散件。

Apr07/開始製作easydriver

# data[].attributes.headline
Tony/激光二极管供电

# data[].attributes.subject
Tony/激光二极管供电

# data[].attributes.body
找一找开关电源。圖片是老黃給畫的。

# data[].attributes.headline
Tony/激光二极管的驱动电路【更新】

# data[].attributes.subject
Tony/激光二极管的驱动电路【更新】

# data[].attributes.body
LT1121，貌似这个芯片不错。

跟LM317一样，都会有发热问题，得换。

這個驅動電路有更新，而且測試可用。

擦，這個芯片在國外漲價了。

# data[].attributes.attachment_link.readable_text
This is another one of my belated updates. It has been about 3 months now since I've received the boards for the updated version of the laser diode driver from Olimex. However, I haven't had a chance to work on any project that required a laser driver until just recently and so the boards were not populated and tested for the longest time. Finally, I can report that the design works, here are some pictures and there's the Eagle board file for the PCB later in the post.

The board was designed with breadboard use in mind and so I spaced the headers for the inputs and the outputs accordingly, see the picture on the left. I don't know if installing the 90 degree headers to stand the board up was such a good idea, I'll probably do other boards with simple straight up headers.
I haven't installed the potentiometer (R1, space indicated on the board) because the project I'm using it for, the DVD CNC laser cutter, does not really require much current adjustment, which is what R1 is doing. I'm powering all parts of the CNC laser cutter, including the laser diode driver from a +5V power supply and it just happens that the 2 Ohm resistor R2 gives me just the right current, approximately 150mA, needed for the red laser diode I've harvested from a DVD burner drive. If you did really need current adjustment, the power supply would have to be raised to about +9V , the R2 would have to be 10 Ohm or just about and the 100 ohm R1 potentiometer would need to be installed.

The R3 resistor which pulls the control input of the LT1121 chip to supply voltage has not been installed either. If you need the driver normally ON, install R3 and don't install R4. If you need it normally OFF, don't install R3 and install R4, which is what I've done here.

It may just be my luck or it may be a temporary situation, but when I started to design this driver back in late 2010, the LT1121 power regulator chip was very common and very cheap, about $0.40 each, delivered from China. It was one of the most important reasons I based the design on LT1121, actually. It took me a while to get a final usable design and have the boards manufactured, so fast forward to July 2012 - the LT1121 chip is nowhere to be found for less than$5 EACH! I still have 3 or 4 of these chips left laying around the bench, and I'm obviously on the lookout for a good source. If anyone knows a good source, I would appreciate a tip!

And last but not least: the Eagle board and schematics files are here:
Laser Diode Driver V2 Eagle schematics and board files

# data[].attributes.attachment_link.title
Laser Diode Driver with TTL Control. PCB V2.0 is ready.

# data[].attributes.attachment_link.description
This is another one of my belated updates. It has been about 3 months now since I've received the boards for the updated version of the laser diode driver from Olimex. However, I haven't had a chance to work on any project that required a laser driver until just recently and so the boards were not populated and tested for the longest time.

# data[].attributes.attachment_link.title
手工制作激光雕刻机:废旧光驱的涅盘之路 - 电子制作 - 电子发烧友网

# data[].attributes.attachment_link.description
手工制作激光雕刻机:废旧光驱的涅盘之路-你愿意亲手制作一台小型激光雕刻机么？其实也不难：拆两台DVD，来回倒腾几遍就能搞定。200毫瓦的激光发射器不算犀利，但足够闪瞎你的双眼

# data[].attributes.body
EasyDrive v4.4

一定要看下面的文檔: Schematic A3967 Datasheet EasyDriver Website Bildr Tutorial Quickstart Guide Replaces: ROB-09402

# data[].attributes.attachment_link.title
EasyDriver - Stepper Motor Driver - ROB-12779 - SparkFun Electronics

# data[].attributes.attachment_link.description
The EasyDriver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or 0 to 3.3V pulse if you solder

# data[].attributes.body
原网址找到了

# data[].attributes.attachment_link.description
I have been trying to get my hands on a laser cutter for some time but they always seem out of reach. All the great things that can be done with a real laser cutter...

# data[].attributes.body
GitHub help in Chinese

# data[].attributes.attachment_link.description
让我最终决定动笔，是源于CSDN蒋总在美国拜访GitHub总部后告诉我的一些见闻，我对GitHub如此成功运作产生了兴趣，于是开始研究GitHub的博客，愈发发现GitHub是一群有趣的人在做的有趣的事，如果只把GitHub当作一个Git服务器，实在是暴殄天物。GitHub已经并将继续获得成功，若真能凭借此书把GitHub尽量全面地展现，让每一个Git使用者用好GitHub也是一件幸事。

# data[].attributes.body
Try GitHub

# data[].attributes.attachment_link.description
GitHub is where over 100 million developers shape the future of software, together. Contribute to the open source community, manage your Git repositories, review code like a pro, track bugs and features, power your CI/CD and DevOps workflows, and secure code before you commit it.