#015 Schnellboot
Building the Bronco NB5004 1/350 German S-100 Class Schnellboot with a dockside diorama with LED effects.

Here’s a quick demo..
Notes
I picked up the Bronco NB5004 1/350 German S-100 Class Schnellboot from an aliexpress seller as pretty much a cheap impulse buy.
I turned out to be a lovely kit - even at 1:350, it is quite detailed, with a nice set of photoetch included.
The Kit

Kit Build
The basic build is quite straight-forward, with the only fiddly bit being the photo-etch.



Paint Scheme
| Part | Recommended | Paint Used | 
|---|---|---|
| propeller | Tamiya X-12 | Vallejo 70.878 old gold | 
| deck surface | Dark grey FS26187 | Vallejo 70.870 Medium Sea Grey | 
| deck surface (wood) | Gunze H-11 | Humbrol 110 | 
| upper hull | Light Grey FS16515 | Vallejo 70.990 Light Grey | 
| lower hull | Tamiya XF-9 | Vallejo 70.985 Hull Red | 
Diorama Base
The diorama base is imaginary dock scene. I was mainly interested in trying the idea of a split waterline display. It came together in a fairly ad-hoc manner, and I suspect my scale might be a bit off!

The Electronics
Some simple USB-powered electronics provide LED effects:
- two white LEDs for the lamp posts on the dock
- an LM324 running two triangle-wave oscillators
    - the oscillators use the same components, but are not phase-locked, so they will drift over time (adding variety to the display)
 
- oscillators drive green and blue “under water” LEDs


Testing the oscillators on a breadboard:

The final build uses a USB adapter module and the oscillator circuits are constructed “dead bug” style on the LM324 chip



Final Gallery





Credits and References
- this project on scalemates
- Bronco Model kit NB5004 1/350 German S-100 Class Schnellboot
- Electronics:
Research References
Build References
- Bronco Models: Schnellboot-Klasse S-100 der Deutschen Kriegsmarine, 1/350 - good kit review at modellmarine.de
 
  