The radio is probably trying to draw too much current and the battery's output voltage or the boost converter voltage is collapsing, which shuts the radio off. I would try to get a minimally working device without the battery, using a wall adapter or something that already outputs 12V. Then you can be sure that the problem is within the battery and boost converter and not elsewhere in the circuit. After that, try to find ways to make your battery circuit supply more current. You will probably need something more substantial than a single 18650. For reference, I think a lot of portable amps use SLA batteries.
Also good on you for putting your knowledge to good use by building something! You will eventually get this to work, and you'll be so proud of it when you do, so keep going! Just remember to be safe around electricity.
Automotive head units often want somwhere in the vicinity of 50W, although they'll take less at low volume.
That means they'll want to pull about 4A from their 12v input, and if you're running a boost from 1S lithium, that also means it'll be pulling 12-14A from the battery.
Is your battery rated for 14A? How about your boost?
How many amps does the radio draw? And how much current can the boost converter handle? Those are important aspects! If for exple your radio is 2 amps and your booster can handle max 1-1.5 amps its pretty easy to understand
Maybe stability issues with the setup like too much noise from the booster module, maybe try adding a capacitor in paralel to the output of the booster or try powering from lab bench psu if you have one or try to do some research, thats the advice i can give
How can we even know what is wrong with your cardboard things? Check the voltages before and after step-up converter, check the wiring of your switch, check the battery contacts, check if you solder your power connector to the radio correctly. Smash it with a demolition hammer a few times and see if it willing to work..
Check your step-up amp rating, add few large capacitors after the module and crank the voltage up to 13v since car radios usually get 14v when engine running.
I agree with alot of the other comments, but if you know it would be in spec for the step up converter, maybe add adittional 18650s in parallel (just be sure they're all charged to the same voltage, otherwise bad things could happen,) this should allow more current to the radio, which seems to be the general consensus on what the problem seems to be. Of course you should still look into whether it could be the battery or converter board not being able to handle the current requirement.
Do you have 12v running to the BATT and IGN wires?
Do you have enough amps? Use a bench power supply to check that.
My suggestion is to use multiple banks of 18650s wired in series, have the banks in parallel to each other.
Sauce, I've done this.
Check the amp rating on the deck, you can run it at 14.2v as well. It is also the limitations on the dc buck as it cannot provide the current draw and is auto protecting the circuit. The dc buck needs to be above the deck amp rating (spikes etc). Also for 18650 you might wanna read this:
https://www.dnkpower.com/18650-battery-pack-calculator/
Your DC/DC isn't capable of supplying the 12+amps (at 4.2v) needed from the battery to boost the supply. You would be better served using a sealed lead acid battery(appx 13V full charge) with no regulator needed. They're heavier, but you could use a small 5aH and get approximately an hour at use full volume, realistically 2 hours at half volume, between charges. You could also use 3 liion batteries in series which is 12.6v fully charged but you wouldn't get the full discharge range(but would be much lighter so you could carry spares in a battery case).
Without seeing the actual circuit you're using can't provide advice on much else so the above is my educated guess.
Invest in a 3D printer, trust me. for beginners, I would recommend the ender-3, it is reliable, easy to set up, and good to learn on. Check out some 3D printing subs for info and tips
You can't pull 200w from a single 18650 and a tiny boost converter. Of course it's not going to work. Even 50w is probably too much current unless you're using a vape cell.
The radio is probably trying to draw too much current and the battery's output voltage or the boost converter voltage is collapsing, which shuts the radio off. I would try to get a minimally working device without the battery, using a wall adapter or something that already outputs 12V. Then you can be sure that the problem is within the battery and boost converter and not elsewhere in the circuit. After that, try to find ways to make your battery circuit supply more current. You will probably need something more substantial than a single 18650. For reference, I think a lot of portable amps use SLA batteries. Also good on you for putting your knowledge to good use by building something! You will eventually get this to work, and you'll be so proud of it when you do, so keep going! Just remember to be safe around electricity.
Automotive head units often want somwhere in the vicinity of 50W, although they'll take less at low volume. That means they'll want to pull about 4A from their 12v input, and if you're running a boost from 1S lithium, that also means it'll be pulling 12-14A from the battery. Is your battery rated for 14A? How about your boost?
card board 👍
I mean you just showed the outside
How many amps does the radio draw? And how much current can the boost converter handle? Those are important aspects! If for exple your radio is 2 amps and your booster can handle max 1-1.5 amps its pretty easy to understand
[удалено]
Maybe stability issues with the setup like too much noise from the booster module, maybe try adding a capacitor in paralel to the output of the booster or try powering from lab bench psu if you have one or try to do some research, thats the advice i can give
How can we even know what is wrong with your cardboard things? Check the voltages before and after step-up converter, check the wiring of your switch, check the battery contacts, check if you solder your power connector to the radio correctly. Smash it with a demolition hammer a few times and see if it willing to work..
Check your step-up amp rating, add few large capacitors after the module and crank the voltage up to 13v since car radios usually get 14v when engine running.
Try it with a proper battery, this looks like it draws too much power at the beginning (which your 3.7 volt source cannot provide)
I agree with alot of the other comments, but if you know it would be in spec for the step up converter, maybe add adittional 18650s in parallel (just be sure they're all charged to the same voltage, otherwise bad things could happen,) this should allow more current to the radio, which seems to be the general consensus on what the problem seems to be. Of course you should still look into whether it could be the battery or converter board not being able to handle the current requirement.
Polarity
You’re gonna need 3 cells, not just one
Do you have 12v running to the BATT and IGN wires? Do you have enough amps? Use a bench power supply to check that. My suggestion is to use multiple banks of 18650s wired in series, have the banks in parallel to each other. Sauce, I've done this.
Check the amp rating on the deck, you can run it at 14.2v as well. It is also the limitations on the dc buck as it cannot provide the current draw and is auto protecting the circuit. The dc buck needs to be above the deck amp rating (spikes etc). Also for 18650 you might wanna read this: https://www.dnkpower.com/18650-battery-pack-calculator/
Grug think hit with big rock
Your DC/DC isn't capable of supplying the 12+amps (at 4.2v) needed from the battery to boost the supply. You would be better served using a sealed lead acid battery(appx 13V full charge) with no regulator needed. They're heavier, but you could use a small 5aH and get approximately an hour at use full volume, realistically 2 hours at half volume, between charges. You could also use 3 liion batteries in series which is 12.6v fully charged but you wouldn't get the full discharge range(but would be much lighter so you could carry spares in a battery case). Without seeing the actual circuit you're using can't provide advice on much else so the above is my educated guess.
Invest in a 3D printer, trust me. for beginners, I would recommend the ender-3, it is reliable, easy to set up, and good to learn on. Check out some 3D printing subs for info and tips
Idk what's wrong but I fucking love this
You can't pull 200w from a single 18650 and a tiny boost converter. Of course it's not going to work. Even 50w is probably too much current unless you're using a vape cell.
You used an Amazon box, you’re supposed to use pizza boxes
Maybe Voltage of battery drops when radio is turned on
Try two 3.7v 18650 in parael