Totally agreed!!!... even we designing our boards we cant compete with that, only the BOM would double the price... I might write them to ask them to send me a board for free at least!!!....hehehe!!!!...
blue boards
Hey Phil,
Give us a link to those blue boards you are talking about. Most likely, yes, they will use a 12VDC supply also. Be sure to get at least a 2 amp one.
I still see some YJ version 2.0 boards on eBay. They are good. Just remember the R and L on the "input" is marked wrong on the boards. Someone posted about that being the case. So, just put you L input where it says right, etc.
Mark
Hey Phil,
Give us a link to those blue boards you are talking about. Most likely, yes, they will use a 12VDC supply also. Be sure to get at least a 2 amp one.
I still see some YJ version 2.0 boards on eBay. They are good. Just remember the R and L on the "input" is marked wrong on the boards. Someone posted about that being the case. So, just put you L input where it says right, etc.
Mark
Oh yeah.
Yuan Jing Audio - ON SALE! - TPA3116 Class-D 2.0 Stereo Amplifier Board [50W+50W] - $19.99
This is the one. From what I've gathered here it Danzz design. They recommend 18-28v but I've done a bit of searching and have found that's been the recommendation for the other yj boards too. But plenty of users report success w 12v. Of course that's if lower output power will do for you. And in my case that would be just fine. I'm wanting to power it with a battery from a riding lawn mower that I have on hand. I have a very nice regulated dc suppy that I can use with the battery too if need be. My thought is that the battery can be used for the cleanest power.
In regards to bridging the boards for a single channel. I may end up setting some of these up for friends. N they may want the highest power they can get!!! 😀
Peace
Phil
Yuan Jing Audio - ON SALE! - TPA3116 Class-D 2.0 Stereo Amplifier Board [50W+50W] - $19.99
This is the one. From what I've gathered here it Danzz design. They recommend 18-28v but I've done a bit of searching and have found that's been the recommendation for the other yj boards too. But plenty of users report success w 12v. Of course that's if lower output power will do for you. And in my case that would be just fine. I'm wanting to power it with a battery from a riding lawn mower that I have on hand. I have a very nice regulated dc suppy that I can use with the battery too if need be. My thought is that the battery can be used for the cleanest power.
In regards to bridging the boards for a single channel. I may end up setting some of these up for friends. N they may want the highest power they can get!!! 😀
Peace
Phil
Last edited:
Please, one question more: where can I find, in the pcb, few volt for a simple on/off led?
Green is ok, but 8k2 resistor seems to be too high.
I=(19-2)/8200=2mA
I think "I" should be around 15-20 mA that means R=1000 ohm, isn't it?
I=(19-2)/8200=2mA
I think "I" should be around 15-20 mA that means R=1000 ohm, isn't it?
Last edited:
2 mA is enough for a very soft glowing standard green 3 mm LED. Or it must be that you like to wear sunglasses while listening.
6k8 is OK for a normal glowing standard green 3 mm LED. Older generation LEDs needed 10 to 20 mA. Please try out what you like. IMO the equipment itself should not distract from listening but you might think otherwise and that's OK.
6k8 is OK for a normal glowing standard green 3 mm LED. Older generation LEDs needed 10 to 20 mA. Please try out what you like. IMO the equipment itself should not distract from listening but you might think otherwise and that's OK.
Attachments
Last edited:
Using a power LED that requires 15-20mA seems extraordinarily excessive as it would double the idle power consumption of the amp. 🙂
In that light (ha ha
) given that these are extraordinarily efficient amps, what would be the most efficient way of making an 'on' light/led ?
Ok, here are my tests:
- green led with a 5k resistor works well! 😀
- 100µF capacitor doesn't work.... bumps still there 🙁
- green led with a 5k resistor works well! 😀
- 100µF capacitor doesn't work.... bumps still there 🙁
An externally hosted image should be here but it was not working when we last tested it.
In that light (ha ha
Not to have one at all. Don't really see the point of it but you are welcome to explain why you'd want one.
LEDs
Hint: Use a constant current source set at a low value such as 2-5mA or what ever brightness you like. Use the SDZ control to disable the CCS so that idle I is only that of the 3116.
The CCS allows for constant LED brightness regardless of the supply V.
I worked for a lighting ballast mfg recently, where Philips was our biggest customer. We could sell ballasts to them cheaper than they could make their own,Advance brand. We are talking shipping containers of them. Why, cheap mfg and comps, where every penny counted. With this method came some real reliability headaches. I know I heard the complains from irate customers.
Back to the hockey game.
Cheers
Rick
Hint: Use a constant current source set at a low value such as 2-5mA or what ever brightness you like. Use the SDZ control to disable the CCS so that idle I is only that of the 3116.
The CCS allows for constant LED brightness regardless of the supply V.
Sure you can but you have the mfg over there where people work for a bag of rice and you have to buy the comps in bulk. It is a numbers game.
I worked for a lighting ballast mfg recently, where Philips was our biggest customer. We could sell ballasts to them cheaper than they could make their own,Advance brand. We are talking shipping containers of them. Why, cheap mfg and comps, where every penny counted. With this method came some real reliability headaches. I know I heard the complains from irate customers.
Back to the hockey game.
Cheers
Rick
Does anyone know if the Feixiang 2.1 board with 4 trimpots have an adjustable sub woofer XO frequency?
2.1 TPA3116 Hifi Class D Digital Amplifier Board 100W + 50W + 50W 50mA 12V 25V-in Consumer Electronics on Aliexpress.com
2.1 TPA3116 Hifi Class D Digital Amplifier Board 100W + 50W + 50W 50mA 12V 25V-in Consumer Electronics on Aliexpress.com
An externally hosted image should be here but it was not working when we last tested it.
I got one, havent tried yet, but If I dont recall badly it Said a adjustable XO from 80hz-500hz, but I dont know If its a low pass for the subwoofer or high pass for the satellites, o maybe both, as it has four pots... If I have the time during the week, I Will try it and try to figure it out... And post it...
