Editor Version ×
Standard

1.Easy to use and quick to get started

2.The process supports design scales of 300 devices or 1000 pads

3.Supports simple circuit simulation

4.For students, teachers, creators

Profession

1.Brand new interactions and interfaces

2.Smooth support for design sizes of over 5,000 devices or 10,000 pads

3.More rigorous design constraints, more standardized processes

4.For enterprises, more professional users

Ongoing

STD test 2

License: Public Domain

Mode: Editors' pick

  • 971
  • 0
  • 0
Update time: 2024-02-21 18:30:58
Creation time: 2019-10-19 17:22:57
Description
My first PCB Design. It will be used in my learn to solder classes at my local public library. Many thanks to Ralph Bacon for the great YouTube tutorials to get me started. - Part 1 [https://www.youtube.com/watch?v=wu2YcZDzzCY](https://www.youtube.com/watch?v=wu2YcZDzzCY) - Part 2 [https://www.youtube.com/watch?v=JdqQD-QMHfE](https://www.youtube.com/watch?v=JdqQD-QMHfE) The circuit uses a 555 timer IC in astable mode creating a high / low pulse on the pin 3 output. Using this calculator [https://ohmslawcalculator.com/555-astable-calculator](https://ohmslawcalculator.com/555-astable-calculator) I was able to design the circuit to have an on / off period of between 650 ms and 1350 ms using the trim pot to vary the period. I designed the output circuit so that half of the LEDs light on the high pulse using the 555 to source the current. The other half of the LEDs light on the low pulse with the 555 sinking the current. This takes advantage of the 555's ability to source as well as sink current on its pin 3 output and the LEDs unidirectional flow property to make the circuit work. I have a Blog post on the board [here](https://keithlohmeyer.blogspot.com/2020/01/adventures-in-printed-circuit-board.html) This circuit is based on other similar circuits found in books and on the internet. I take no credit. ### Assembly Notes I use this board for my learn to solder classes. Here are the steps I usually recommend. Start with the components closest to the board. * Resistors (check values, no polarity) * 555 timer IC (look for pin 1 dot or half moon notch) * potentiometer * LEDs (all single rings one color. all double rings the other color. long leg in the + hole) * capicitor (long leg + hole) * switch (either way) * battery connector (insert wires from back. Red +) I use 2 velcro dots as double sided tape to mount the 9v battery to the back of the PCB. if you have the bottom of of the battery near the bottom of the PCB it will act as a stand for the board ![wreath 2.jpg](//image.easyeda.com/pullimage/oyt70afhFk9kfYsgnlmMMo69RK1tMTTqkaQGF3Hh.jpeg)
Design Drawing
schematic diagram
1 /
PCB
1 /
The preview image was not generated, please save it again in the editor.
Project Attachments
Order File name Download times
1

first board.png

1
Project Members
Target complaint
Related Projects
Change a batch
Loading...
Add to album ×

Loading...

reminder ×

Do you need to add this project to the album?

服务时间

周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
  • 立创EDA微信号

    easyeda

  • QQ交流群

    664186054

  • 立创EDA公众号

    lceda-cn