From time to time many people come into this website and make really helpful contributions.
For a long time now I have survived on Chris Greacens 12 volt DC shunt load controller, but have never been really happy with it.
Ghurd has kindly made his circuits available to this website and as a result I took a trip over the border from Hong Kong to the electronics market in Shenzhen. I have manage to purchase all that I need for 'through the hole' and SMD options.
Intending to make a neat and worthwhile job of it I used PCB Express to create a PCB which incorporates four circuits - two 'through the hole' and two SMD all on the same board. All the circuits are linked by a 'ring main' for DC supply, so that whichever way the board is cut up 1,2 3 or 4 connector blocks are available for a power supply.
I am also old fashioned and I like to have plenty of options to firmly secure the PCB in situ hence the presence of sufficient screw/bolt holes for any configuration.
I am pleased to say it all works perfectly.
Readers should note that the LED's can be installed in various ways to suit personal preference.
The 'ring main' DC power supply tracks are shown in some photographs, and in others I have removed unecessary parts of the track to avoid power going around the board. All circuits have a protection diode.
David in HK
