Trouble blinking leds with TIP31
Hello everybody, I am trying to make a blinking circuit to hook up to the LED strips in my car so they blink in sync with the bass.
I have made a circuit following some instructable here, I can't recall which it was. Anyway, I'm pretty sure the schematic is correct, because the leds blink.
Now two problems arise: I have hooked them up to the subwoofer out of my radio ( a Kenwood kdc something), and after enabling it I was told to put a speaker coil in series to increase the resistance, in order not to fry the channel. Is this right?
Next, the leds don't quite blink, but they pretty much stay on all the time, with very little variation, I suppose because the sub out gives out quite a high voltage, so the transistor does not open the enough for the leds to blink properly. I was thinking of putting a resistor/potentiometer in series with the signal coming from the radio, in order to reduce the voltage and have a better blinking effect. What do you think?
Thanks in advance, peace :)
Discussions
Best Answer 4 years ago
I supply circuit designs because you do not.
Peace or the World in pieces......
Answer 4 years ago
This is similar to the circuit I made, except for the fact that I didn't use another TIP31 to amplify the channel, since I think the sub out provides a decent amount of voltage.
The point is: the LEDs stay on too much, and they don't blink much, I suppose because the voltage is too high for the transistor to open the circuit enough.
What should I do?
Answer 4 years ago
Now you have enough gain to add series or parallel RC filters to make your led respond to high or low frequency.
Answer 4 years ago
Sure, RC Low-pass Filter
http://en.wikipedia.org/wiki/Low-pass_filter
Answer 4 years ago
Thanks. I'll go for this :)
4 years ago
show us the circuit you built for a start.
What exactly are you tryimng to do?
In general the issues tend to be that the LED isn't off long enough for you to be able to see it.
Answer 4 years ago
See above for the the circuit :)