Double Heading / RC Board
This double heading board lets one hand control [potentiometer] or radio control receiver operate two independent motor controllers. Designed to allow easy plug and play implementation of double-heading aka multi-unit [MU] operation. It can also be used as a convenient way to switch between wired and RC control of a single DNO / Pro-120 / 150 controller.
Magnetic Kill Switch Launched
We wanted a magnetic kill switch that could be used as a safety cut-off device for our controllers, we couldn’t find anything suitable so decided to make our own.
It’s available here.
Ditch Light Flasher Launched
Some US customers asked if we could make this – it’s a unit that provides a timed flashing action for ditch lights.
It’s available here.
Hall Throttle Adaptor [for DNO]
A number of people asked if it was possible to use a Hall type throttle with a DNO controller. Hall throttles usually have a 1V – 4V output, but the DNO needs a 0V – 3V signal as a minimum.
This little adaptor board converts the output of a Hall sensor into something suitable to work with the DNO range.

Dual Channel Interface
It’s here….our new dual channel interface. This nifty board allows you to control two of our DNOs or Pro series from a dual axis joystick. It gives true single-handed control of speed and direction in skid steer vehicles. We used to make an analogue version of this years ago but this one is digital which makes it much more versatile. It can accept pot or hall inputs, and can operate with the throttle in center-off or single ended mode. The steering sensitivity can be adjusted via the trim pot. If you’re building a ride-on tank or Banana Splits type buggy this could be what you need.

Throttle Lever
We’ve been looking for a cost effective throttle lever for ages now and not found anything suitable, so we thought we’d have a go at building our own. 3D printed in tough rPETG, it’s got removable end stops and center detent. All metal parts are stainless, and it has a hall sensor that’s good for 10 million cycles. Easy to dismantle and all parts are replaceable. The end result is a substantial, chunky, throttle lever designed for applications where the odd knock is expected.

Pro-360 High Power Controller Launched
Our new Pro-360 is now in production. We’re really chuffed that it’s only taken a little over 6 months to go from concept to launch. Using the control board from the Pro-160 meant that we could re-use most of the software, and using the metalwork from the 4QD-300 gave us proven high power hardware. If you need a high power controller with lots of features come and have a look.

Porter 3 Speed Board
We were asked by a Greenpower team to come up with something to help equalise the power available to all three drivers. All too often we see the first driver going hell for leather only for poor old number three to end up looking like the proverbial Miss Daisy and grinding to a halt after 85 minutes. This board plugs in between the normal throttle arrangement and the Porter, and can be used to restrict the power available to each of the first two drivers. Alternatively it can allow multiple engine modes i.e. “normal”, “pass”, and “all out”.

![Double heading [or MU] board.](https://www.4qd.co.uk/wp-content/uploads/DHB-202-2-500x450.jpg)

