this post was submitted on 16 Sep 2024
13 points (100.0% liked)
Ask Electronics
3173 readers
2 users here now
For questions about component-level electronic circuits, tools and equipment.
Rules
1: Be nice.
2: Be on-topic (eg: Electronic, not electrical).
3: No commercial stuff, buying, selling or valuations.
4: Be safe.
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
I've actually done that with a simple single diode rectifier and a supercap with zener voltage limitation:
If your supercap has a too low series resistance for the LED to light immediately you need an additional resistor in series with it. It is simple and small enough to directly fit inside the original lamp casing and has been working without a problem for over 3 years.
What I wanted to do was something like that
Though you seem to have a better knowledge and better circuit. I bought 2 super cap 5.5v so I wanted to put them in series (though get half the capacitance). Your approach seems to be better and I may take it. Though mine should be working ? Keep in mind that I'm a nooby in electronics and I keep learning from the internet so not the best to have solid base...
Does your solution works with 5.5V, the 6V dynamo does not blow it ?
Thank you for your answer I really like it.
Your solution may very well also work, good thinking. A few things to consider though:
Ok, I forgot the voltage drop =\ I got LED light so should be fine. What I should do is put your circuit to the test without the capacitor and check if the voltage is low enough for the capacitor to handle ? How should I balance the capacitors ? (Even if I will not take this path, I would like to know)
Thanks again for your help