We are developing a lot of the lighting being used in the OSSEV® and the MX-5e. These lights require a module to limit the current and stop the LEDs burning out. This project aims to develop a generic and configurable Pulse Width Modulation (PWM) module to enable control the current to the lights. We are this module so that it can be resin encapsulated in a 3D printed case to make it fully waterproof. The module will be easily swappable and use 6.3mm spade connectors.
The circuit design is based around the NE555 IC to provide the PWM function and an IRFZ44VPBF N-channel MOSFET to provide the high power capability. We are using a design that supports a low duty cycle as we are directly driving the LEDs from the 12V (up to 14.5V in practice) battery.
The PCB design was created in Autodesk Fusion 360.
This was the V1.0 the PCB that we have been testing but, V2.0 is now with manufacturing.
In keeping with the philosophy of the OSSEV® project, we share our designs for free use by individuals. If you would like to use these designs for commercial use, please contact us for permission and to be added to our list of suppliers.
Once we have finished testing, the PCB design will be shared here.