Car Radio Power Consumption: Selecting the Right Power Supply for DIY Garage Project

Question

How much electricity can a car radio draw? I'm going to make myself such a radio in the garage and I don't know what power supply to do it.

Anonymous · Accepted Answer

It depends on the radio, volume and speakers. Turn on the ammeter with the radio running on the battery and you'll know.

Anonymous · Accepted Answer

See how much power it has, if there are any inscriptions like "4x35W" or something like that, then you have to reckon with high power consumption. If there is nothing like that, then a 2A power supply is enough.

And as for the ATX power supply - tuning should work correctly. Try connecting them to some other power supply for a while - it may even be a weak one - and then check the operation.

Anonymous · Accepted Answer

The 470 micro capacitor is very small, and it is what causes the hum. Install a 2200 micro capacitor and check.

Anonymous · Accepted Answer

The radio will play at 0.5A, only when boosted to the maximum it will turn off or dim very much. On the other hand, inaccurate filtration causes hum.

Anonymous · Answer

At maximum volume, the radio can draw over 5A.

Homeruss · Answer

So if you want to make a power supply for nigo, the transformer is at least 5 A ??

Anonymous · Answer

If you're going to use the radio's maximum power, then yes. Of course, we are talking about a radio with decent power. Cheap bazaars work even on 1-2A power supplies.

Homeruss · Answer

It's not some old cassette radio. I tried to connect it to some old ATX power supply with a power of about 100W and the radio worked only that nothing changed on the display, even though I was turning the frequency knob. Does this mean that the PSU is too weak?

konik83 · Answer

New radios around 4x20W RMS can draw 10A and even more.

pita1988 · Answer

I doubt 5A is more real

Homeruss · Answer

I assembled the power supply from a 12V - 0.5A transformer; rectifier bridge and electrolytic capacitor 470µF and when the speaker is connected, it buzzes terribly in it. Radio reception is fine but the buzzing is annoying. Is there a way to mute it or is it possible to modify this power supply somehow? I will add that it is about 2 meters away from the radio.

Vsad · Answer

Capacitors are not small. How many do you have ? 0.5 A + rectifier bridge is a bit small, you need to give another power supply or a small 12 V battery, e.g. 1200mA

Bretos · Answer

Gee, I suggest you see what the fuse is in this radio, and use a power supply that is 0.5A weaker ... Simple.

Vsad · Answer

Jeju connect to the battery, put the volume on max and check with the meter how much power it consumes and then combine. If it hums, it can't be weaker. Even if it is 10A, the radio will only take 3A
James695 it's also true that there should be some condek behind the bridge, preferably a pair

Homeruss · Answer

You were right. I installed a 4700 µF capacitor and the radio no longer hums. As for the current, I checked it on a car battery and max draws 0.3A, so 0.5 should be enough.

konik83 · Answer

With 5A at 14V you will make a maximum of 70W of power. 4x20 > 70. The power is already missing, and where is the CD drive, display, efficiency .... My radio has a 15A fuse, that also means something. Of course, if we listen quietly, the conscription will not be so large.

ciuqu · Answer

Hello Half an amp is enough to listen to the radio quietly. What radio is this? Regards

Car Radio Power Consumption: Selecting the Right Power Supply for DIY Garage Project

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