Folk band instruments 2021

Last Updated or created 2024-02-06

Today newest addition Concertina

Bert Visscher and Herman Finkers

Hacking a hikvision doorcam

Last Updated or created 2022-07-14

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


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.

Uboot Game

Last Updated or created 2022-03-28

2019-06-08 I’ve bought myself Uboot the game.

It is one of my favourite board games.

Playing with a cardboard uboot is … okay. But when you have a 3D printer .. do i need to say more?

Parts printed

3D printed version assembled and completed in Jan 2021

All assembled and put Leds inside.

Led’s are controlled by a Arduino, Mqtt or a fysical button can be used.