1answers

[Others] "Output Frequency" on a DC switching power supply means the switching frequency of the power supply?

Hi all. The output frequency of this power supply is 20-100kHz. Since its DC out, which would be 0Hz, am I correct to assume that the 20-100kHz would be caused by the switching. So I could in theory u...
3answers

[Others] Can I run a Passive Speaker without an amplifier?

Can I connect a 0.5W Speaker direct to an input (Raspberry pi in my case) and expect it to be as loud as a let's say a phone speaker? Will a very small speaker work directly from an input? If not ...
  • answered Oct 23,2020
    by Joson
4answers

[Others] Is there any way to fix it?

Hi all, my mini USB connector somehow broke off the board and has been rattling around its casing, I opened it up and found where its supposed to be connected, is this saveable? could I just solder th...
1answers

[Others] How to quickly reading GPIO pin LOW/HIGH directly?

I'm expecting to see the state of a pin that I'm reading to pull low for maybe 50 us and then back up to high. The original code running on an UNO/Nano code looks about like this:while ((...
4answers

[Others] Relay Output Problem

I'm doing a Sanitiser dispenser with an Ultrasonic Sensor. For every alternate sensing of the hand, I'm getting a brief disturbance signal from the relay. It goes on for a few milliseconds and...
  • answered Oct 15,2020
    by Paul H
2answers

[Others] The difference between PMSM and BLDC speed control

The speed of the PMSM is controlled by varying the frequency of the three phase signals that go to the motor windings, but the BLDC motor’s speed is controlled by varying the voltage amplitude. Why is...
  • answered Oct 15,2020
    by Kemio
1answers

[Others] Question on Differential Signaling Pull-up/Pull-down Resistors

For an electronics project I have to implement a differential signaling mode for transmitting data. I'm planning on using some sort of differential driver and receiver IC. Now I was wondering if t...
3answers

[Others] How to prevent cables from disconnecting from the screw terminals in a relay module

I'm controlling a lamp with a relay module but I'm worried about the cables disconnecting since I'm working with mains electricity and the cables are very easy to disconnect once screwed t...
  • answered Oct 12,2020
    by Gorge
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Ranking Name Answers
1 PCBWay Team 4
2 KhronoSound Audio 1