Tag Archives: electronics

Started to build a Drawbridge

For my amiga i started to build a floppy disk reader/writer using a arduino.
I found a superb project by rob smith.
It uses only a arduino pro and a FTDI USB to serial breakout board, to raw read and write disks.
I wanted to convert my own created amiga disks to PC image to use in a emulator like vice.

http://amiga.robsmithdev.co.uk/instructions/promini

I’m not going to copy his website, with all instructions. Only my personal experiences.

Starting with … don’t use a IDE cable, and start soldering .. it is a diskdrive cable .. connector doesn’t fit! ..

Getting components and flashing arduino … no brainer

Working Amiga 500

Got a working amiga again. \o/ woot
Needed to replace Paula chip, cleaning and some TLC.

Modulator
Chip donor

Scart cable i’ve got is one without the resistors, so my monitor isn’t detecting the signal.
Using a A520 modulator works. At least RF, don’t know why RCA/composite video isn’t working.

Even a memory expansion and second drive (5.24 inch) are working.

One of the first disks i tested

To do:

  • Fix something to get disk images from and to my pc.
  • (My old catweasel card only fits in a ISA slot which i don’t have any more)
  • I was wrong .. i’ve got a IV Catweasel .. PCI it is
  • Fix scart
  • Fix my Action Replay, which i soldered into a non working state apparently .. 🙂
  • Get a better mouse!
Catweasel IV

Disks to convert:

  • Personal text files from ages ago
  • My first seka demo
  • My oscillator drawing program
  • Other assembly source files

Got another one running today also:

Wannahaves

Fun .. but do i need it?

HackRF One

HackRF One from Great Scott Gadgets is a Software Defined Radio peripheral capable of transmission or reception of radio signals from 1 MHz to 6 GHz. Designed to enable test and development of modern and next generation radio technologies, HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation.

  • 1 MHz to 6 GHz operating frequency
  • half-duplex transceiver
  • up to 20 million samples per second
  • 8-bit quadrature samples (8-bit I and 8-bit Q)
  • compatible with GNU Radio, SDR#, and more
  • software-configurable RX and TX gain and baseband filter
  • software-controlled antenna port power (50 mA at 3.3 V)
  • SMA female antenna connector
  • SMA female clock input and output for synchronization
  • convenient buttons for programming
  • internal pin headers for expansion
  • Hi-Speed USB 2.0
  • USB-powered
  • open source hardware

I’ve got dvb alternative below now. Hackrf cannot be bought anymore

Gemini PDA

Android / Linux PDA

ALTAIR 8800 EMULATOR KIT

The Altair 8800 is a microcomputer designed in 1974 and based on the intel 8080 CPU. Using only switches to program and leds for output.
Even my DIY build computer has a hex keyboard input and 7segments display.

Omnicharge 20+ Usb C Wireless Power Bank 20,000mAh Power Delivery 3.0 + Quick Charge 3.0

You can use this as a mobile soldering station using a TS100 soldering iron.

Rigol Oscilloscope DS1054

SDCard reader for C64 and other commodore machines

Got this one now, superb. Will post about this

 Tv Stick Dab Fm Dvb-t RTL2832 R820T Sdr RTL-SDR Dongle Stick Digitale Tv Tuner Ontvanger TVSDVBS816

Update : got this one, review later on.

Clear case for amiga and tank mouse

Hacking a hikvision doorcam

I don’t like cloud enabled devices, except if it is my own cloud!

I bought a Hikvision doorcam, when i researched the diverse doorcams where was a hikvision which could use a existing doorchime.

When i got mine in, it did not have this feature.
Damn what to do!

Where where several solutions i could think off:

  • Use as is .. a no-go for me
  • Offload SSL on a proxy and try to reverse engineer the https communication
  • Or a hardware solution

I looked at the electronics and tried to find out how things where connected and where things where you could make use of.
I soldered some wires to a little print where the pushbutton was located.
Now i could read the button press, video was easily captured by using a RTSP port.

Does it work? … yes, but i’m not happy about it

Video playback in Zoneminder or VLC

rtsp://admin:secretpassword@hikvisionip:554/Streaming/Channels/101

A solution i used before for a generic doorbell

Just read the gpio pin with Arduino or raspberry.
A generic optocoupler will work, just check your resistor.

Electronic pipes

While they are not the real thing, and sound mostly bad. These little electronic devices are great on the move.

Great for using with headphones. Nice to have one of those in your backpack on holiday.

I’ve bought a Technochanter in 2004 and a deger in 2005, both with their benefits.
(I’ve got a little batterypowered mixer with dual output, so Coline and I can play a duet in silence 🙂 )

Technochanter at the top, the black one is the Deger

Both can play accidentals like natural C/F and more.

Links

http://www.fagerstrom.com/
https://www.deger.com/

I designed a electronic bagpipe in the 90’s myself, but it never was a success. ( Shall update this page when I find the schematics )

In 2010 I bought a Yamaha QY100 seqencer. I can connect the deger using a DIY midi cable, and use its buildin instruments.

Specs deger:

  • Same size and finger spacing as a long practice chanter.
  • Dual output: PHONES and MIDI! Headphones and MIDI devices can directly connect to the DegerPipes Chanter. It’s also possible to connect the phones output to an amplifier or a stereo.
  • The chanter contains all electronic components as well as the battery. No external box or additional equipment is needed.
  • Authentic Bagpipe sound including drones generated by wavetable sound synthesis. Highland Pipe and Smallpipe sounds integrated.
  • Perfectly tuned chanter scale and drones by usage of crystal oscillator and microprocessor control.
  • The Pitch is adjustable in a range of more than three octaves. This enables you to play together with other instruments in any key.
  • The drones volume is variable and can also be switched off.
  • Through MIDI output every MIDI compatible tone generator or other MIDI equipment can be used (for example PC with notation program).
  • An extended cromatical scale is available allowing you to play tunes which are not playable on the real pipe chanter.
  • Driven by a cheap standard 9V Battery, Accumulators are also usable.
  • Up to 100 hours of playing with only one battery.
  • Automatic power off after a minute of no activity.
  • A Metronome is integrated within the Chanter.
Deger Midi Cable

Specs Technochanter:

  • Fits in your pocket: only Ø16 x 225 mm (Ø5/8″ x 9″)
  • Uses earphones (not included): therefore perfect to play on buses, trains etc. Ideal for the commuter.
  • Natural C and F.
  • Pitch alterable.
  • Unforgiving at detecting crossing noise.
Finger Chart


Below a link to the QY100

Hardware scroller

I came across a really old post from 1996.
It was from a good friend of mine Martin.

It was a while before this post, which was by Fido mail, that he came to our house with a great idea. (1993)

FidoNet is a worldwide computer network that is used for communication between bulletin board systems (BBSes). It uses a store-and-forward system to exchange private (email) and public (forum) messages between the BBSes in the network, as well as other files and protocols in some cases. (Dial-up!)


He took a record player and connected leds to it. Connecting this to a C64 and synching the speed of rotation and the output, he wanted to display text on this.

Probably this was the mistery tape i mentioned here:

So he did the most of the programming, i made a version of my own and added a sync bit to it. This enabled it to get the scolling text more “in place”

Some pictures from Sepp’s website

--- Terminate 3.00/Pro
 * Origin: Sepp Mail Development Department (2:283/334.13)

Ä Mail van en voor mij ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄBewarenÄ
Msg  :  781     [1-3089]                   Loc
From : Martin ********                     02-Apr-96  00:59:51  2:283/334.13
To   : Henri Aanstoot                                           2:283/334
Subj : Hardware scroller
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄSEPP.INTERESSANTÄ
* Written in: TUKKER=PROAT
Ha die Henri!
 MM>> Heb je de laatste KIJK al gezien??? Die eikels hebben onze 8-ledjes-
 MM>> hardware-scroller na zitten maken, alleen scrollt-ie bij hunnie niet
 MM>> in de vorm van een cirkel, maar hebben ze mijn ruitenwisserversie
 MM>> gebruikt... En het enige wat-ie doet is de tijd aangeven...
 HA> Bah, wat een na-apers.
Ja, vreselijk...

 HA> Maar die van ons was toch beter!
Inderdaad... kunnen ze nog wat van leren... :-)

 MM>> Btw is jouw prototype nog operationeel??? De mijne niet, omals de
 HA> Nee, ik wil heb eigenlijk opnieuw bouwen! (was ik al een tijdje van plan)
Met full-colour LEDs, 16 hoog???

 MM>> elastiekjes die ik heb gebruikt in de loop der tijd helemaal poreus
 MM>> We moeten maar weer eens iets compleet revolutionair nieuws uitvinden,
 MM>> ik heb nog wel een paar innovatieve ideejen...
 HA> Als je gaat kijken wat ze allemaal van mijn gejat hebben .......
Nou, vertel...

To the loo,

Martin ********