Hi @allocsb, Thank you for your reply. I have just started to look at this, as I have other things to do as well, but my initial impressions,...

Hi Ron @zander, The potential problem is the 5V supply may (accidentally) get to the R-Pi GPIO pins. And, knowing that R-Pi 4s do not come cheap, ...

Hi Ron @zander, Drivers being momentarily blinded by LED lights from vehicles is a subject that the UK government is just waking up to, (after sev...

Hi @allocsb, I think your best way forward is to post a sketch of your connections. This is a similar, though more extensive request, to that mad...

Hi @mikeburton_2000, Great to hear you have moved forward. Although I would 'quarantine' the parts you might have damaged with 5V, I wouldn't bin ...

Hi Bill @billinfl, Good to see you have made some progress. The ULN2003 is one of those 'ubiquitous' chip designs that lots of companies seem...

Hi Ron @zander, My simple headlight has basic, 1 step PWM dimming to about half power ... I haven't measured it, but it effectively strobes, as t...

Hi Ron @zander, I know nothing of bike lights, post about 1970, excepting when I see one passing me in the street. As for headlights (for people'...

Hi Mike @mikeburton_2000, I sympathise with your frustration, and confess to having a lot of sympathy with the general principle of choosing a micr...

Hi Ron @zander, I don't know if he has personal commercial aspirations as such ... he may be looking at this from an 'open hardware' or 'demonstrat...

Hi Ron @zander, My interpretation, which may be completely wrong, is that he is, or has been influenced by, a long distance rider ... which for so...

Hi Ron @zander, A (small) transformer on a bike seems reasonable to me ... not sure what you are thinking ... Best wishes, Dave

Hi @j526, Of course, the split secondary was used in the valve (tube) era, when wire was cheaper than multiple glassware, but it is still a current...

Hi @j526, Sorry, I haven't really thought my answer through, as it isn't something I was personally interested in doing, but a Google based sugges...

Hi @j526, I don't ride a bike, so I am not familiar with present technology associated with bikes. Perhaps someone else will come up with some be...