2answers

[Others] Look for the arduino controllable power supply

Hi all, I need to control the speed of a handful of small pumps independently. The speed is directly related to the voltage supplied. I can't really use pwm and the voltage to the pumps must...
2answers

[Others] What are those "plus signs"?

How can I avoid adding the three plus signs, shown, that are not part of my design? What are they called? I'm using Ultiboard.
1answers

[Others] Is it possible to exceed inputs whilst keeping concurrency?

I'm building something with an arduino nano which uses 8 buttons (digital) and 8 potentiometers (analog). I would like to add more inputs to the build, but need to be able to use multiple inputs a...
1answers

[Others] A question: what is the impedance of a resonating LC circuit?

1. Some people say that capacitive reactance cancels out inductive reactance, so the impedance of an LC circuit is 0 Ω to its resonant frequency (not accounting for wire resistance).2. Others say that...
3answers

[Others] IS IT Okay to run 400V on 12A? 7 anode at startup?

I'm playing with a 6AR6 design right now running at 400V B+, and am worried about damaging the 300v max input triodes. The operating point is closer to 150, but ofc they will be exposed to the ful...
7answers

[Others] Can I connect 0.5W speaker with 3W amplifier directly?

I am going to make an arduino project which uses a 0.5W speaker, attached to PAM8403(3W amplifier). Can I directly connect them or should I use a resistor?
3answers

[Others] Can I use a linear regulator together with a boost converter?

Hey guys! I'm making a digital power logger and I was wondering if I should add a linear regulator after a switch-mode converter to make the signal less noisy and more stable or should I stick to ...
2answers

[Others] How to create a symmetric voltage supply for an op amp after a DC/DC conversion?

I have a power supply that provides +36V DC and -36V DC to power the amplifier, but I also need to supply positive and negative voltage to op amps (in an active crossover before the amplifier). Should...
4answers

[Others] How to distinguish these buzzers?

I got that there are active and passive buzzers. But they look same. How to distinguish these guys?
4answers

[Others] What need to be checked before upload?

Before upload the pcb design, what do I need to check? Any experiece and suggestions are welcomed!
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1 PCBWay Team 6