What did you build today (Pictures) ?

[hek]

I've been busy this week building my first native android app in (nativescript-vue). It will control my new car charging station (HALO Wallbox). The charging port will automatically turn on when I'm closing in to our house and turn off off when leaving the area.

[NeverDie]

@hek Is that to prevent others from using it?

[hek]

@NeverDie, yes, and to have a small project to learn app development.

[GertSanders]

One of three ongoing projects:

lasercut box
atmega1284p based
DS3231 rtc (very accurate and 2 alarms!)
LDR
20 by 4 LCD, two sizes of numbers, menu driven setup
buzzer
leds for moodlighting
doppler for proximity detection
encoder for scrolling through values (for setting time)
buttons with LED feedback for interactivity
mp3 player
most interface objects MySensorised :-)

This entry is to boost my energy, because we are still a long way from home (pcb is still not made, focus is now on prototype and software).

[NeverDie]

I love the design of the air vent on the righthand side of your laesrcut box. Does that pattern have a name?

[GertSanders]

@neverdie nope, but it is inspired by oriental frames, I just made that based on what I saw on one of my cabinets (which I bought while living in Singapore).

[GertSanders]

@neverdie I will publish the project once it has advanced a bit more (still need to design the PCB for this box).

[mickecarlsson]

@sundberg84 how is the rev10 progress going? I am about to order a batch of EasyPCB but want the new bells and whistles :-)

[NeverDie]

@gertsanders Cool. You might like this pattern also then:

[dbemowsk]

@neverdie That's cool. Kind of like an overlapping honeycomb design.

[sundberg84]

@mickecarlsson except I have not yet tested the new things on the back (signing and extra flash) the boards are working. I will try to test the last things before May is over and the publish.

If you want to order I can offcourse email you the Gerber's but on your own risk.

My first experience with the board is that it's performing better than Rev 9 with the new position if the hardware. Also the ground plane helps.

[GertSanders]

@neverdie that is a nice pattern. I found that these things need time to draw. If anyone has a DXF file, I would love to try it.

[mickecarlsson]

@sundberg84 thanks for the offer, I can wait for the final, no worries. Do you have a list of the new components added on the back?

[NeverDie]

@dbemowsk said in What did you build today (Pictures) ?:

@neverdie That's cool. Kind of like an overlapping honeycomb design.

Bingo! Looks like that's exactly what it is. A small honeycomb superimposed on a bigger one.

[dbemowsk]

@neverdie I created that basic pattern in OpenSCAD.

Here is the scad

 $fn = 6;
 fudge = 0.01;
 
 pi=3.1415926;
 large_diameter = 40;
 circumradius = large_diameter/2;
 inradius = circumradius/(2*tan(180/$fn))-1;
 
 height = 2;
 line_width = 1;

 rotate([0, 0, 0]) hollow_cylinder(large_diameter-line_width, height, line_width);
 
 for(i=[1:$fn]) {
     rotate([0, 0, (360/$fn*i)+30]) translate([inradius, 0, 0]) rotate([0, 0, 30]) hollow_cylinder(circumradius, height, line_width);
 }
 
 
 module hollow_cylinder(diameter=10, thickness=2, line_thickness=2) {
     difference() {
         cylinder(thickness, d=diameter);
         translate([0, 0, -fudge/2]) cylinder(thickness+fudge, d=diameter-(line_thickness*2));
     }
 }

[dbemowsk]

Expanding on that, I mapped it out further to give people an idea of how it's calculated.

And the scad based on my previous post.

 $fn = 6;
 fudge = 0.01;
 
 pi=3.1415926;
 large_diameter = 40;
 circumradius = large_diameter/2;
 inradius = circumradius/(2*tan(180/$fn))-1;
 
 height = 2;
 line_width = 1;
 
 for(i=[1:$fn]) {
    rotate([0, 0, (360/$fn*i)+30]) translate([inradius*2, 0, 0]) rotate([0, 0, 30]) honeycomb();
 }

 module honeycomb() {
     rotate([0, 0, 0]) hollow_cylinder(large_diameter-line_width, height, line_width);
     
     for(i=[1:$fn]) {
         rotate([0, 0, (360/$fn*i)+30]) translate([inradius, 0, 0]) rotate([0, 0, 30]) hollow_cylinder(circumradius, height, line_width);
     }
 }
 
 
 module hollow_cylinder(diameter=10, thickness=2, line_thickness=2) {
     difference() {
         cylinder(thickness, d=diameter);
         translate([0, 0, -fudge/2]) cylinder(thickness+fudge, d=diameter-(line_thickness*2));
     }
 }

[sundberg84]

@mickecarlsson - sure.
Signing: atsha204a (sot-32-3), R4: 1k-100k resistor (0805), C5 0,1uF capacitor (0805)
Flash: R7: 56k-100k resistor (0805), C7; 0,1uF capacitor (0805), U5: AT25DF512C or equivalent SPI Serial Flash Memory (8-lead SOIC). I bought this from Germany (but not tested)

[sundberg84]

Yesterday I tested the new EasyPCB with RFM radio and hardware signing. Worked out as expected and I'm going to release all files soon.

I haven't tested the flash part yet but I'm hoping this is working as well.

This picture will be a part of a new video with me building my new RFM69 serial gateway using signing.

Anyone they can guess which issue I had when I took the photo?

Rev9 vs Rev10 (inkl signing) rfm gw

[mickecarlsson]

@sundberg84 the RFM69 is soldered 180 degrees wrong on the new board :white_frowning_face:

[sundberg84]

@mickecarlsson interesting thought but no because the radio on rev9 isn't soldered in the image (but wrong rotated as you noticed). The hardware on that image is working. I added a HW radio without noticing so with the old code I just got no reply/Nack. I had to add the HW define.