IS Icstation Bluetooth 4.2 Stereo Audio Receiver Board Amplifier 2x5W 3.7-5V Mini Ampere Module for Portable Wireless Speaker DIY

Including images for 2 separate projects using the same components. First project used a 2500mAh battery. The 2nd attempt used a gutted 3xAAA battery case with a 1500mAh battery to make it smaller to better fit into the sleeping mask.They only provided 1 Battery connector and 1 JST connector (product image misleading) so it's forced upon you to solder or buy another JST connecter which might delay your project, unless you have spare JST connectors laying around. Update: I purchased a 2nd unit and it came with 3 cables as shown in the product image.This board uses beeps for BT connection. No cheezy Engrish prompts. Eventually I desoldered all the JST connectors and replaced the capacitor with a new one laid on its side. I wanted as low profile as possible. I wish the capacitor was laid on its side to begin with. Even better would be an SMD only version with through holes for soldering to make it as low profile as possible. This board was already low profile but I wanted it slimmer. Update: The absolute slimmest it can be is about 9mm-10mm (both sides total height) with a new capacitor laid on its side.The only thing that gets warm on the board is the LED. Super bright blue blinking LED is very annoying. While paired during idle or max volume it's barely warm and holds that temp indefinitely, good enough for a wearable. We'll see about longevity since I do plan to use this daily.Don't try to reuse hair thin 32 gauge repurposed headphone wire with it. It'll get hot from the resistance. Use 22 gauge or thicker wires. If your board heats up it's user error. Found out the hard way.I had absolutely no problem with connection or hum. Unlike other bluetooth modules this one does not suffer from noise or hum, it has excellent audio quality. The only thing I don't like about this board is that upon pairing it automatically starts playing music on my phone without asking. It doesn't even open a music app. Music just comes out of nowhere. I have no idea how they do that or why. It's a bit disconcerting.The DWCT14+ is perfect for bluetooth headphone projects. The Adafruit 328 battery (2500mAh) & Adafruit 259 charging board work awesome with the DWCT14+ They remained stone cold through the entire process. Very impressed with the adafruit components. I used 32 Ohm .25W speakers. Yes they're plenty loud. You don't need 8 Ohm 2W speakers on your ears. ;) For a bluetooth headphone project that's all you need to make DIY 40+ hour bluetooth headphones.

The sound quality is great, as expected. I did a frequency test with a function generator and a sound power level meter. The lowest frequency is less than 20 Hz. I was able to feel the speaker move at below 20 Hz. It was pretty level all the way up to 11KHz. I can't hear above that, I had to rely on my sound power level meter. So, the frequency response is flat, which is what you want. It does not exaggerate the bass. I know that kids like to blast bass.My phone tells me the battery level. I've connected this to two 18650 lithium ion cylinder cells. That would be 3.7 volts, which means a usable range of 3 to 4.2 volts.The board runs cool to the touch. Just slightly warm.The blue LED slow-blinks this bright light.It uses very little energy when playing music.It has minimal external parts.There is no volume control, so you adjust it on your phone.You need your own external power switch.To turn the device off, you disconnect power. When power is restored, it reconnects to your phone, or more likely, your phone finds it.It has only one mounting hole.

It's cheap, astonishingly small, lets you use a spare micro-USB cable for power, pairs easily with BT, produces clear sound, and is capable of being hard-wired into projects. What's not to like? Well: an annoying super-bright LED indicator light (whose flash/solid states are inscrutable), an apparent time-based auto-off feature that requires you to power-cycle the board to wake it, and a complete lack of documentation. I love the concept and the sound, but the execution is flawed and I'm sending it back.

I play around a lot with electronic modules and it’s nice to run into one that does everything it says it can.This Bluetooth amp is small, only 20mm by 40mm. It has a Bluetooth 5.2 transceiver chip and two NS4165 audio amplifier chips. Just about any speaker should work with it. It comes with 3 pair of wires with connectors, one for power and two for speakers. It has a bright blue LED to show the connection status. It blinks rapidly when searching and slowly once connected. There is also a single tone from the speakers when connection is made.It calls for a 3.7 to 5 volts power source, but is really designed to work with a single lithium battery. You need to use a protected battery or add a protection board to the circuit. If the unit powers down you need to break the power connection for a few seconds then reconnect to power on again. A switch in the circuit will do that. The board has a micro USB connector that can be used to power it and also to charge the battery.My setup was a protected 18650 battery, a power switch, and two 100 watt 8 ohm shelf speakers. In testing I used it continuously for two days. For sources I used my laptop, a Nook Android tablet, and my phone.All three paired quickly. I had no problem keeping the tablet or phone paired from 50 feet away. If the source is also Bluetooth 5 compatible, which my phone was, it also reports the battery percentage charge.Sound quality is excellent. Listening to YouTube videos or playing music the frequency response was nice and even within my hearing range. There was no change in audio level within the 3.7 to 5 volt input range.Power consumption is extremely low. Standby is less than 10ma and the unit will power down after 10 minutes of silence. Starting with a fully charged battery, at 4.2 volts, the voltage only dropped to 4 volts after 8 hours of continuous operation. Using USB power a power meter showed about 20 mah consumption. This would make it ideal to use a small flat battery if you wanted to make a miniature Bluetooth speaker project. No components got warm with with battery power or when the USB was connected charging the battery.In my opinion this is an ideal module to base any Bluetooth speaker project on. Excellent product!!

Hi, I am glad that you are interested in the Icstation Bluetooth receiver, My name is Dean, I am 56 and have been involve in the electronic field since I built my first circuit at 6 years old, electronics have evolved A lot since then. This product has superb sound quality with its class D digital audio amplifier circuit, whether I used it as a Bluetooth receiver at the 15 meter transmission distance it has (tested in open space), or I plugged it into my computer or phone (Samsung Galaxy 9s was used) USB jack and seamlessly use it as a USB sound card (powered through the USB cable). Speaker hookup is simple, as is the power, with the included cables. Do not connect any of the speakers wires to each other, digital amplifiers are not designed to have any common outputs. I agree from technical experience that A charging board be incorporated in a portable battery powered application, this is a quality built circuit that works best with a good quality battery system. The Icstation Bluetooth receiver paired flawlessly to the different devices I tried, it feels good to hit 'pair' without expecting A delay. I watched the news on my phone while it was paired through Bluetooth to the receiver and watched the lips of the reporters to detect any delay the Bluetooth may induce, I then played a video game, also paying attention to any lagging sound, the high quality chip this uses kept it well below the acceptable minimum.