New part/module to test
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I’m pretty sure the SPK DET lead allows the computer to know if there’s a speaker in place; my VOM shows it tied to ground.
According to https://www.contrapositivediary.com/?p=1758
@mfalkvidd Great info. Thanks.
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Interesting, they run from 2V, need only a few external component and and they cost peanuts on AliExpress, I'm buying 10 right now for testing with the speakers salvaged from my children toys.
@nca78 i assume you are talking about the amp chip. I think they are similar to the LM386. Sounds like they have a lower input voltage range.
Vera Plus running UI7 with MySensors, Sonoffs and 1-Wire devices
Visit my website for more Bits, Bytes and Ramblings from me: http://dan.bemowski.info/ -
@nca78 i assume you are talking about the amp chip. I think they are similar to the LM386. Sounds like they have a lower input voltage range.
@dbemowsk said in New part/module to test:
@nca78 i assume you are talking about the amp chip.
Yes of course. I don't thing they are many speakers+PCB available on the market, maybe in the US but not here at least :)
It looks pretty simple to use so it's not a problem to go with the chip. -
@dbemowsk said in New part/module to test:
@nca78 i assume you are talking about the amp chip.
Yes of course. I don't thing they are many speakers+PCB available on the market, maybe in the US but not here at least :)
It looks pretty simple to use so it's not a problem to go with the chip.@nca78 said in New part/module to test:
It looks pretty simple to use
Getting sound out of an amplifier is pretty easy... but to get a good sound and filter all noise is harder, especially if you are going to use this near any RF signals or power supply. But you probably know this already...
Controller: Proxmox VM - Home Assistant
MySensors GW: Arduino Uno - W5100 Ethernet, Gw Shield Nrf24l01+ 2,4Ghz
MySensors GW: Arduino Uno - Gw Shield RFM69, 433mhz
RFLink GW - Arduino Mega + RFLink Shield, 433mhz -
@nca78 said in New part/module to test:
It looks pretty simple to use
Getting sound out of an amplifier is pretty easy... but to get a good sound and filter all noise is harder, especially if you are going to use this near any RF signals or power supply. But you probably know this already...
@sundberg84 said in New part/module to test:
@nca78 said in New part/module to test:
It looks pretty simple to use
Getting sound out of an amplifier is pretty easy... but to get a good sound and filter all noise is harder, especially if you are going to use this near any RF signals or power supply. But you probably know this already...
I never did anything related to audio, it's not in my plans yet, but I'm looking for (it seems) something similar to what @dbemowsk says: make a loud noise/audible alarm and with only a handfull of parts. For that no need to worry too much about noise or distortion, I'm not planning to use it for music.
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@sundberg84 said in New part/module to test:
@nca78 said in New part/module to test:
It looks pretty simple to use
Getting sound out of an amplifier is pretty easy... but to get a good sound and filter all noise is harder, especially if you are going to use this near any RF signals or power supply. But you probably know this already...
I never did anything related to audio, it's not in my plans yet, but I'm looking for (it seems) something similar to what @dbemowsk says: make a loud noise/audible alarm and with only a handfull of parts. For that no need to worry too much about noise or distortion, I'm not planning to use it for music.
@nca78 - sounds like a cool project. You will be able to amplify a analog signal using these chip like x100 (the more you amplify the more noice-killers you need) but even this will not be enough to make it very loud. Now, I dont know how "loud" you will need the alarm to be but most likely you need a more powerful amplifier for a household-alarm type of dB.
Controller: Proxmox VM - Home Assistant
MySensors GW: Arduino Uno - W5100 Ethernet, Gw Shield Nrf24l01+ 2,4Ghz
MySensors GW: Arduino Uno - Gw Shield RFM69, 433mhz
RFLink GW - Arduino Mega + RFLink Shield, 433mhz -
@nca78 - sounds like a cool project. You will be able to amplify a analog signal using these chip like x100 (the more you amplify the more noice-killers you need) but even this will not be enough to make it very loud. Now, I dont know how "loud" you will need the alarm to be but most likely you need a more powerful amplifier for a household-alarm type of dB.
@sundberg84 said in New part/module to test:
@nca78 - sounds like a cool project. You will be able to amplify a analog signal using these chips from a couple of mV to like x100 (the more you amplify the more noice-killers you need) but even this will not be enough to make it very loud. Now, I dont know how "loud" you will need the alarm to be but most likely you need a more powerful amplifier for a household-alarm type of dB.
Haha no, it's not for a home alarm but as an alarm for a sensor, possibly battery powered. Just need to be loud enough to be heard, but no need to pierce anyone's ear drums :D
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@sundberg84 said in New part/module to test:
@nca78 - sounds like a cool project. You will be able to amplify a analog signal using these chips from a couple of mV to like x100 (the more you amplify the more noice-killers you need) but even this will not be enough to make it very loud. Now, I dont know how "loud" you will need the alarm to be but most likely you need a more powerful amplifier for a household-alarm type of dB.
Haha no, it's not for a home alarm but as an alarm for a sensor, possibly battery powered. Just need to be loud enough to be heard, but no need to pierce anyone's ear drums :D
@nca78 Ahhh :D - the I think you will do just fine ;)
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@nca78 said in New part/module to test:
It looks pretty simple to use
Getting sound out of an amplifier is pretty easy... but to get a good sound and filter all noise is harder, especially if you are going to use this near any RF signals or power supply. But you probably know this already...
@sundberg84 not looking to do hi-fi sound, mainly to amplify an alarm or something simple.
