Electronics > Beginners
I dont know how to wire this simple amp
<< < (3/9) > >>
Brumby:
Have you checked the speaker?

Simple field test: Use a 1.5V battery and a couple of wires connected to the speaker terminals.  Hold one wire to one end of the battery and briefly tap the other wire to the other end of the battery (polarity not important).  You should hear a pop and/or crackle.

The actual sound doesn't matter - just whenever the circuit is completed/broken you get some sort of noise at a clearly audible level, the speaker is good.  This is a simple test that proves continuity and cone movement.

Don't have the battery connected for anything more than a fraction of a second.  A constant DC voltage will prove nothing as the cone will be held in one position and sound is only created with cone movement.  Also, if you have a low impedance speaker with a low power rating, connecting a battery for too long may heat up the voice coil.  In those cases, just brush the second wire over the second battery terminal.

A multimeter continuity test will show if there is a circuit, but it may not offer enough current for an audible response.  If the speaker cone is jammed, then it may not produce any sound, even though the voice coil is intact.
rdl:
Pretty much every seller of electronic doodads from China offers those amplifier modules.

https://www.ebay.com/itm/TDA2030A-Audio-Amplifier-Module-Power-Amplifier-Board-AMP-6-12V-1-18W/192163691131
Hextejas:

--- Quote from: rdl on September 01, 2018, 04:34:36 am ---Pretty much every seller of electronic doodads from China offers those amplifier modules.

https://www.ebay.com/itm/TDA2030A-Audio-Amplifier-Module-Power-Amplifier-Board-AMP-6-12V-1-18W/192163691131

--- End quote ---
That's the one I have. Thank you rdl. Now back to my questions. The 9v is a battery and I have a 1kHz tone at 5v coming from a signal generator. The battery has a pos and a neg terminal. And so does the generator. So what wire goes to which of the 4 connections ?
Maybe there is not enough juice in the 9v to be able to push this speaker. It worked ok with the prior amp,, although it was a different device. A cheap Chinese stereo amp.
StillTrying:
The minimum voltage for the TDA2030A is 12V or +/-6V, and 50mA quiescent current, so you'll have to try it with a bit more voltage and current.

The ebay link looks like someone has thought +/- 6V is the same as 6V - 12V.

Are the 2 GNDs pins on the board actually connected together.
Zero999:
As mentioned above, the TDA2030 is not a class D amplifier, but a class AB amplifier. It is also completely unsuitable for operation at 9V. If you need it to run off a 9V battery, your best option is to return it, get a refund and buy an amplifier which really will work off 9V.
https://www.ebay.com/itm/DC-3V-9V-TDA2822M-Mini-Mono-Audio-Single-Power-Volume-2W-Amplifier-Board-Module/252840104297?epid=722098777&hash=item3ade71d169:g:75UAAOSw4CFY33PK

If you want to keep your this amplifier, then you need a much higher power supply voltage. Although the TDA2030 will work off 12V, it still isn't optimal and at 12V will probably only give an output power of 2W, into a 4Ω speaker or 1W into an 8Ω speaker. A 24V power supply is ideal. Two 12V 7Ah sealed lead acid batteries and a 5A fuse would be perfect for powering the TRDA2030.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod