# Using a 0.5 watt speaker with an Arduino **URL:** \ **Category:** Audio\ **Created:** [January 31, 2024, 8:52pm UTC](https://forum.arduino.cc/t/using-a-0-5-watt-speaker-with-an-arduino/1218420 "2024-01-31T20:52:22Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![matswendel](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/matswendel/32/1039555_2.png) [@matswendel](https://forum.arduino.cc/u/matswendel)\ **Post date:** [January 31, 2024, 8:52pm UTC](https://forum.arduino.cc/t/using-a-0-5-watt-speaker-with-an-arduino/1218420/1 "2024-01-31T20:52:22Z")
Hi, I have a little problem and maybe one of you can help me. 🙂 I bought an MP3-TF-16P to realize a small project. With the supplied 2W 8Ohm loudspeaker, it works perfectly. But now I would like to use a 0.5 watt 8 ohm speaker. Unfortunately, when I connect it, there is no sound. Unfortunately, I don't know much about sound engineering and can't really find any information on the Internet as to why this might be. I would appreciate any advice! I'm a bit lost at the moment! 😅 LG Mats ---
**Author:** ![anon94801460](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@anon94801460](https://forum.arduino.cc/u/anon94801460)\ **Post date:** [January 31, 2024, 8:55pm UTC](https://forum.arduino.cc/t/using-a-0-5-watt-speaker-with-an-arduino/1218420/2 "2024-01-31T20:55:52Z")
Most likely, either your wiring is wrong or defective, or the speaker is defective. Post a closeup, focused photo of the setup and perhaps forum members can help. In the meantime, check for bad or shorted solder joints and proper continuity, using a multimeter. ---
**Author:** ![DVDdoug](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/dvddoug/32/671533_2.png) [@DVDdoug](https://forum.arduino.cc/u/DVDdoug)\ **Post date:** [January 31, 2024, 9:10pm UTC](https://forum.arduino.cc/t/using-a-0-5-watt-speaker-with-an-arduino/1218420/3 "2024-01-31T21:10:32Z")
Does the speaker measure 8-Ohms? It's OK if it measures a little less, maybe 4-Ohms because the DC resistance is usually lower than the rated (AC) impedance. And most meters aren't super accurate when you get "close" to 1-Ohm. If it measures open, it's dead (or it's a piezo transducer and not really an 8-Ohm speaker). (Disconnect it from the circuit to measure.) The wattage rating on the speaker is the maximum you can feed-it from an amplifier. Theoretically, you could burn-out the speaker, since the audio board can put-out 3W into 4-Ohms and 1.5W into 8-Ohms, but that probably didn't happen. Otherwise it's not important and you can connect a 100W speaker, and you'll just get the maximum the little amplifier can put-out (or less with the volume turned-down). Try connecting a 1.5V battery across the speaker and it should "click". (Don't connect 5VDC because 5VDC into 8-Ohms is about 3W.) ...It might click quietly when you measure Ohms with a meter. ---
**Author:** ![anon94801460](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@anon94801460](https://forum.arduino.cc/u/anon94801460)\ **Post date:** [January 31, 2024, 10:36pm UTC](https://forum.arduino.cc/t/using-a-0-5-watt-speaker-with-an-arduino/1218420/4 "2024-01-31T22:36:12Z")
Cross posted to: [0,5 Watt Lautsprecher mit MP3-TF-16P verwenden](https://forum.arduino.cc/t/0-5-watt-lautsprecher-mit-mp3-tf-16p-verwenden/1218396) ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [July 29, 2024, 10:36pm UTC](https://forum.arduino.cc/t/using-a-0-5-watt-speaker-with-an-arduino/1218420/5 "2024-07-29T22:36:56Z")
Closed on July 29, 2024, 10:36pm UTC This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.