diff --git a/content/posts/desk-automation-big-arcade-buttons.md b/content/posts/desk-automation-big-arcade-buttons.md new file mode 100644 index 0000000..1777f51 --- /dev/null +++ b/content/posts/desk-automation-big-arcade-buttons.md @@ -0,0 +1,20 @@ +--- +title: "Big shiny arcade buttons" +date: 2019-11-05T08:20:43+01:00 +draft: true +summary: Adding buttons to my "smart desk" +images: [/static/img/buttons-aus.jpg, /static/img/buttons-switches.jpg] +--- +Last [post]({{< ref "/posts/desk-automation.md" >}}) i teased the next upgrade of my smart desk project which are some big arcade buttons to control the light even when my network is down. Well... + +I finished that part over the last few days: + +{{< figure src="/img/buttons-aus.jpg">}} + +The buttons i did choose for the desk are thous big arcade buttons[^1] as they produce this satisfying click when pressed. They come with an integrated LED and resistor, but -as they are not supposed to be driven by a 3.3 volt microcontroller- they need 12 volt supplied to be fully lit up. For the controller i use a normal USB power supply so i tried to power the LEDs with 5 volts. That made them bright enough so i went with that... +To up the 3.3V logic level from the GPIOs of the controller to 5V i just used a normal 2N2222 NPN-Transistor[^2]. Soldered together the switches + transistor + some cables the "thing" looks something like this: +{{< figure src="/img/buttons-switches.jpg">}} + + +[^1]: You can find them easily when you search ebay or any other site that sells electronics from china +[^2]: [Sparkfun](https://learn.sparkfun.com/tutorials/transistors/applications-i-switches) describes the basic circuit quite good \ No newline at end of file diff --git a/layouts/partials/footer.html b/layouts/partials/footer.html index 26f8620..49a5783 100644 --- a/layouts/partials/footer.html +++ b/layouts/partials/footer.html @@ -1,8 +1,10 @@ -