4QD Ltd

22/04/2026

We're sponsoring a Cambridge University team to compete in the Monaco Energy Boat Challenge. This involves a series of speed, endurance, and slalom races. They're using a Lynch motor and one of our Pro-360-HCs. The data logging feature is proving its worth. Here's a clip of them in early testing....

17/04/2026

Ever wished your wheelie bin would take itself out? Well these ones could.... https://youtu.be/-FLS2VIDbqA Powered by our Pro-160s.

66 likes, 16 comments. "Motorised wheelie bins"

20/02/2026

Here's the next in our series of videos on the Pro-100 / 160 / 360 features. This one is all about the acceleration and deceleration ramps.

In this video, Paul from 4QD talks about the acceleration and deceleration ramps in the Pro X-60 series of controllers. Looking at how these ramps work, and...

10/02/2026

Not something we do every day, but a customer asked if we could create a custom PCB for them. This one lets them mount a PLC for a sensing / switching system for some chemical tanks and pumps. Here's the first batch on their way.

16/01/2026

We've started working on a collection of technical videos, each one is aimed at a particular feature of the Pro-100, 160, and 360 controllers. This one is about the fault codes and error messages....https://youtu.be/HpfeTiRukNE

01/01/2026

Here's a quick compilation of the videos that were submitted for our competition. Thanks to everyone that took part, we really enjoyed watching them, and we're looking forward to seeing what you all manage to create in 2026.
Happy new year from us all at 4QD!

03/12/2025

Back in 2019 we created a system for a lad with restricted mobility to drive a club loco. Well he's just acquired his own train and his carer asked if we could come up with a system for him. This combo allows control authority to be passed between primary and secondary positions, as well as providing a safety override feature.

20/11/2025

Not exactly our most complicated circuit, but we thought that this little test board will help with troubleshooting our Porter controllers.

14/11/2025

At the recent German model exhibition, we were asked if we could change the case on our DNO and Pro-100 models to be top fastening. This will make it possible to remove the cover for any adjustments, without having to dismount the entire controller. The prototypes arrived today, and they look pretty good.....

03/11/2025

Here’s a video of the finished machine for training drug detection dogs. The customer came to us after having been let down by a previous supplier. We designed the electronics, supplied the controller, and wired up the panel in time to meet their deadline. Reckon Fido will be having a lot of fun 😉.