Recent content by Vatech

Thank you all for sharing your experience with me . Following your suggestion problem solved. Seems that adding a second cable to ground the Respeaker solved the issue. Although I didn’t understand good what was the issue since the problem solved by following the same route. The module was...

Yes, seems you are correct, how do i fix this? on amplifier audio common and power common are bridged (as they should), what should i do?

https://wiki.seeedstudio.com/ReSpeaker_Mic_Array_v2.0/ I tried to power externally the 5v line and I had no noise. BUT when I bridged the common line (ground) between the 5v power supply and the common line of the 12v Source NOISE STARTED.

Seems you were correct, although i don't know how to move on. I tried to power externally the 5v line and I had no noise. BUT when I bridged the common line (ground) between the 5v power supply and the common line of the 12v Source NOISE STARTED. What should I do? I never faced that before

i tryed to use 105 capacitors combined with electrolytic 1000μF with no improvment. lower value , 103,104 could help but i do not have on stock and i have to deliver the project soon, so waiting to receive is not an opption. I have inductors and mosfets, zener , resistors and alla common used...

i tryed 105(0.1μF capacitor) combined with 1000μF electrolytic capacitors, on both input and output. No improvment

- if you mean about the dc-dc converted i used the modules based on 1) XH-M404, 2) XL4016, 3) XL4015 , 4) voltage regulator LM1084IT-5.0 -No , unfortunately i don’t, i could upload a record from the noise of the amplifier -all the connections have common ground, continuity tested to verify each...

I am sorry, i forgot to mention that i tryed different modules and also voltage regulators: 1) XH-M404, 2) XL4016, 3) XL4015 , 4) voltage regulator LM1084IT-5.0 5) voltage regulator lt1083cp with no improvment. i watched the following video , and he explains that voltage regulators have almost...

Into a project I am working is use 12Vdc SMPS to power an audio amplifier and some more components. We have no “noise” on that stage. Then I use a step down converter to convert the 12V to 5V and power a mic preamplifier (Respeaker – usb Mic array) and a development board. There is a lot of...

Sorry for misstyping the 4mm and this are the specs of my motor By the above calculation is needed a Stepper with at least 0.04Nm Holding Torque? So in my case the 1.8Nm is a bit too much? OverEngineered?

I build a Z-axis (not the one displayed on image). The weight of the Buildplatform is 2.29kg and is going to be used on a MSLA printer, so the weight might get increased 1kg additionally, so 3.29kg. The problem is that when detached from the printed model from Fep film there is a resistive...

Thank you. Then i will not use TVS. Dear @Baluncore & @DaveE , is the folloowing diagramm correct according the use of bridge rectifier?

Dear @DaveE , can a bridge rectifier protect from overvoltageas like the TVS will do? i found the following TVS diodes available in my country And, should i use Unidirectional TVS or Bidirectional TVS? Dear @Baluncore , i see you moved the capacitor and added a second Diode in parallel with...

I will follow the advice by @DaveE and @Baluncore . If you agree with the connection diagram Please let me know 1) Should i use Tantalum, Ceramic or Electrolytic Capacitor (1000μF)? 2)Do you agree wit the use of TVS diode(transient voltage suppression diode)? and if yes , should i add...