Computer, IOT / Domoticz

Android and devices in your neighbourhood

When i play around with Arduino’s which i have flashed and start with their own access points. It’s sometimes not clear which remote IP is connected.

Applications like Tasmota,Wled and Easyesp startup with their own Access Point, which you can use to connect to and configure them to your real accesspoint.
So you connect to this temporary AP, and want to remote access it with your phone’s browser. Not all apps (certainly not my apps) have a captive portal. Most won’t .. Which ip to use to connect?

Install JuiceSSH of you don’t have it .. it’s a must have really

Select quick connect – local device

Enter command “ip neigh”, It wil show devices connected to your android phone or which where broadcasting in your network-neighbourhood

Most of the times it also your default gw .. which can be found in settings. But above gives you more information.

Computer

DrawIO

I used to draw my network using inkscape, or graphviz. But the last years i’ve been using DrawIO. A friend is drawing his. So i posted some tips.

When using inkscape, i liked the way that i could view more or less details using layers. But editing was hard.

Getting DrawIO:

There is a online version: https://app.diagrams.net/
You can download a AppImage
And .. install it in your nextcloud, which is the way i’m using it.
(Login as admin, click Apps and search for draw.io)

Some tips on using images ..
Below is a example of a Mikrotik switch with connector points.

Use a search engine to look for images, the ones with front facing connectors are easier to use.
I always look for images which have a transparent background.
Using google you can use below ‘trick’
google > images > tools > color > transparent
Just copy-paste into your DrawIO document, it is better to have a large picture which you can resize as the other way around.

Adding connection points:

Left click the image in DrawIO, right mouse and Edit connection points

Now you can place/remove edit connection points.

Due to security reasons i won’t be posting my complete network image ..

Another tip:

Network sheet a friend is working on

Device is not straight, so its harder to get the connections right. Besides that, the lines are below the device. Click line and select bring to front.

Computer, Tech

Keyboard leds sound reactive

How much fun …. just wanted to share my recording

I’ve written some tools for my keyboard like a mqtt client, but this is someone else’s. But it gave me some ideas …

My keyboard is a Razer BlackWidow V3

Computer

So i wasn’t being stupid designing a dual matrix keyboard thingy

As previously posted, i had an idea to create a dual matrix keyboard mashup using available components.

I mentioned that “it should theoretically work”. But only being using atf22v10c for a couple of days. It was a long shot.

I’ve put it to the test .. and it worked first time.

I can use above, to connect my extended matrix keyboard to a 6522 VIA chip using 5 pins and sending a data available signal to CA1.

This keyboard i was planning to use
Music

Spotify export

Nice .. you can request a data export from spotify, much like google’s takeout.

I wil export your streaming history, playlists, library and more.

Login spotify on a desktop, goto privacy settings and request data.

Nice to generate some statistics from this data.

For now the top 50 played artists (nr of times, artist)

790     "Rammstein"
507     "Fred Morrison"
478     "Lincoln Hilton"
437     "Avicii"
420     "Shooglenifty"
347     "Treacherous Orchestra"
323     "Battlefield Band"
321     "Breabach"
295     "Nightwish"
254     "The Fraser Shaw Trust"
236     "Michael McGoldrick"
207     "Peatbog Faeries"
207     "Calum Stewart"
203     "Lúnasa"
197     "Martyn Bennett"
194     "Jeff Wayne"
193     "The Prodigy"
173     "Kíla"
172     "Ross Ainslie and Jarlath Henderson"
170     "Buena Vista Social Club"
153     "Ross Ainslie"
150     "Dàimh"
138     "Bliss"
125     "Hans Zimmer"
124     "Rare Air"
118     "Michael McCann"
107     "Kyle Tuttle"
107     "Beinn Lee"
105     "Bourne & Macleod"
 89     "Wolfstone"
 88     "Ímar"
 83     "Afro Celt Sound System"
 81     "Gordon Duncan"
 81     "Armin van Buuren"
 80     "Face The West"
 79     "Tyurgen Kam"
 79     "Aly Bain"
 72     "Keltik Elektrik"
 71     "Duncan Chisholm"
 66     "Liz Carroll"
 63     "Project Smok"
 63     "Blazin' Fiddles"
 62     "Dagda"
 61     "Trail West"
 59     "Julian Winding"
 57     "Solar Fields"
 57     "Dougie McCance"
 56     "John McSherry"
 56     "AES DANA"
 52     "Gaelic Storm"

Get top 50 script

 cat  *json | grep artistName  | sort | uniq -c | sort -nr | head -50 | cut -f1,4,5 -d\" | sed s/,$//g
Computer

Generic matrix keyboard

In this case designed for my 6502, but it is a generic setup.

I it just a dual 16key matrix decoder merged together. You can probably use this with raspberries, arduinos etc.

I wanted to use 74C923 but these are nowhere to be found. And even then, the number of keys wil be 20.
So i am tying together two 74C922 using some logic in a PLD.

First draft

It wil be something like above. Using the data availabe signal i can combine both 16key matrixes. (In theory .. it is all untested)

PLD Code

GAL22V10
Address Decoder

PHI2 DA0 DA1 D01 D02 D03 D04 D11 D12 D13 D14 GND
NC D0 D1 D2 D3 D4 DA NC NC NC NC VCC

DA = DA0 + DA1
D0 = D01 & DA0 + D11 & DA1
D1 = D02 & DA0 + D12 & DA1
D2 = D03 & DA0 + D13 & DA1
D3 = D04 & DA0 + D14 & DA1
D4 = DA1 

DESCRIPTION
Key matrix merger

I’ve got my new keys of the keyboard in today!

  • 0-F – hex keys
  • G = Go
  • R = Reset
  • S = Step
  • M = Memory
  • Cursor keys (up/down for memory locations)
  • ??? I’ve got room for 8 more keys

My inkscape template (keys are 10/10mm)

Printed on white and red paper

https://media.henriaanstoot.nl/keyboardmatrix.svg

Art, Computer

Blender 360 degrees test

Next to try is a VR setup.

Another blender project i’m planning to do this week is a movie displaying my logo to overlay on my videos.
So i have to render a transparent movie for this.

Howto:

Open a scene, i took the liberty to get one from blenderkit.

Change output to cycles, eevee doesn’t work

Make x/y large enough in output tab. X = 2 * Y !

Next select your camera, and open camera tab

Change Type to panoramic and then you can change panorama type to Equirectangular

Position your camera and hit F12, it wil take a long time!

You get something like this

Use a proper plugin for your website, or view with your VR glasses!

Computer

6502 Update

New address decoder in place!
Connected RAM/ROM/SID/VIA1/VIA2 and ACIA

ROM8000-FFFF
SID7000-700F (sound)
VIA16000-60xx (Hex key matrix)
ACIA6800-68xx (serial)
VIA25000-50xx (led test at the moment)
RAM0000-3FFF

To plan: Bigger maxtrix keyboard and other displays

ACIA 6551

Got a serial connection working between the 6502 and my linux machine!

3 line serial – no hardware handshake

At the moment when a reset occurs , hello is being printed.
Text typed in the minicom terminal, is echo-ed back and displayed on the LCD display.

Things learned: Do not trust internet schematics blindly!

The crystal used for the ACIA (pin 6/7 1.8432Mhz needs a 1M ohm resistor parallel over the crystal, and a 30nF capacitor from pin 7 to GND

When using a terminal emulator, and using 3 wires. Disable hardware handshake.

Keyboard rewired.

What didn´t work as planned:

New amplifier schematic for the SID. There is too much noise.

Amplifier with a LM628

Bought a dual power supply (5V and 12V). But this one has a lot of signal noise on the SID part and even my battlestation speakers!

LED test 2nd via

PORTB = $5000 ; VIA PORTB
PORTA = $5001 ; VIA PORTA
DDRB = $5002  ; Data direction register
DDRA = $5003  ; Data direction register

LED  = %10000000

	.org $8000

reset:

	lda #%11100000 ; Set top 3 pins on port A to output
	sta DDRA

	lda LED 
	sta PORTA

loop:		; done loop until doomsday
	jmp loop

irq:
nmi:
	.org $fffa
	.word nmi
	.word reset
	.word irq

ACIA part

ACIA_RX = $6800
ACIA_TX = $6800
ACIA_STATUS = $6801
ACIA_COMMAND = $6802
ACIA_CONTROL = $6803

    lda #$00
    sta ACIA_STATUS
    lda #$0b
    sta ACIA_COMMAND
    lda #$1f
    sta ACIA_CONTROL
Hobby

Diorama’s progress

I like to work on mini models and diorama’s.
The fine miniature work helps me relax, it’s a zen moment for me.

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Computer

Address decoder in a ATF22V10

Whereas i needed to use several logical components to make a address decoder, below i only need one!

cat addressdecoder-fash.PLD 

ATF22V10 (GAL22V10)
Address Decoder

PHI2 A15 A14 A13 A12 A11 A10 A9  A8  A7  A6 GND
xx xx RAM ROM SID ACIA VIA1 VIA2 DEV0 DEV1 BANK VCC

/RAM = PHI2 * /A15 * /A14
/ROM = A15 * BANK
/SID = /A15 * A14 * A13 * A12
/VIA1 = /A15 * A14 * A13 * /A12 * /A11
/ACIA = /A15 * A14 * A13 * /A12 * A11
/VIA2 = /A15 * A14 * /A13 * A12

/DEV0 = A15 * /BANK

DESCRIPTION
Address decoder

galasm addressdecoder-fash.PLD # Generates below file which i can flash into the PLD

cat addressdecoder-fash.jed

Used Program:   GALasm 2.1
GAL-Assembler:  GALasm 2.1
Device:         GAL22V10

*F0
*G0
*QF5892
*L0924 11111111111111111111111111111111111111111111
*L0968 11100111111111111111111111111111111111111111
*L1496 11111111111111111111111111111111111111111111
*L1540 11111011011110110111111111111111111111111111
*L2156 11111111111111111111111111111111111111111111
*L2200 11111011011101111011101111111111111111111111
*L2904 11111111111111111111111111111111111111111111
*L2948 11111011011101111011011111111111111111111111
*L3652 11111111111111111111111111111111111111111111
*L3696 11111011011101110111111111111111111111111111
*L4312 11111111111111111111111111111111111111111111
*L4356 11010111111111111111111111111111111111111111
*L4884 11111111111111111111111111111111111111111111
*L4928 01111011101111111111111111111111111111111111
*L5808 01000101010101010100
*L5828 0100000101100100011001000111001001100101011100110111001100100000
*C50fa
*
b734
Only the left chip! .. The two on the right are 7Segment decoders

So one chip replaces schematic below!

"If something is worth doing, it's worth overdoing."