2answers

[Others] When using an NPN transistor for switching does the emitter have to be grounded?

I am trying to control a remote via the gpio pins on a raspberry pi. I don't want to have to use relays because of the space they take up and the mechanical noise. The problem is the pads of the r...
  • answered Aug 11,2020
    by Gorge
2answers

[Others] Is it ok to switch a high frequency signal with a low frequency transistor?

If you have a high frequency signal, going through the collector - emitter of a general purpose transistor, can you just turn it on/of with a low frequency signal at the base?If you leave the transist...
  • answered Aug 11,2020
    by Gorge
2answers

[Others] Will the led driver burn these two led strips If I connect 2 of these led strips to the Led driver(output: 12v 30A)?

The Led driver (output: 12v 30A) and two led strips of 5m each (Input Voltage: 12V DC, Power: 2A 24W).
  • answered Aug 10,2020
    by Gorge
5answers

[Others] Can I use magnet wire to light an LED with an Arduino?

I need to control a really small LED and use the thinnest wire possible so it looks hidden. Magnet wire is very thin and might work but I want to know if I can control an LED with it?
4answers

[Others] Rotary encoder keyboard for Hantek PC Scope

Can you please advise on schematic available for a keyboard contaning rotary encoders. This project is for a Hantek 6254 USB PC based Scope.
  • answered Aug 07,2020
    by Jason
4answers

[Others] How do I trigger a TIP32C PNP transistor with a 5V output signal from an NE555 IC?

I would like to know how. What voltage does the TIP32C need to make it as a solid state relay. Thanks for any help.
  • answered Aug 06,2020
    by Gorge
2answers

[Others] Symbol fields are not in the correct place in schematic

Hi all,When I place passive symbols in a schematic the fields, they don't seem to stay where I placed them in the symbol editor and I can't seem to figure out what I'm doing wrong. Has any...
  • answered Aug 06,2020
    by Kemio
4answers

[Others] Cooling problem---150W boost converter + 100W power LED

I have 12V 10A power supply (PC ) and I use 150W boost converter to raise voltage into 32-35 V (1,5-2A) . I added 15x10cm aluminum plate (5mm thickness , 3 cm fins) to cool LED (thermal paste added).I...
  • answered Aug 06,2020
    by Kemio
4answers

[Others] Do anyone know how to make this amplifier run on battery

This amp run on 12-24v ac。
  • answered Aug 06,2020
    by Joson
3answers
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Ranking Name Answers
1 PCBWay Team 4
2 KhronoSound Audio 1