Questions tagged [pcb-assembly]
The process of mounting electronic components onto a printed circuit board. This can be done manually with a soldering iron, or automatically using a "Pick and Place" machine.
501
questions
0
votes
0
answers
136
views
AC/AC power supply for PCB
I am trying to source the right setup for powering this PCB:
I have found an 18 V AC/AC power supply but it has a barrel connector:
I am struggling to work out how to connect the barrel connector to ...
0
votes
1
answer
104
views
Washing of an IC
Can someone tell me what is the information regarding the process of washing the device during production?
This question is with respect to the Microchip LAN8741A
5
votes
1
answer
281
views
How does PCB manufacture work for double sided SMT assembly with BGA's?
How does a conventional board house deal with the issue of reflow during PCB component assembly with BGA's on both sides of the board?
Are two different solders used (like regular lead free SAC305 and ...
4
votes
1
answer
425
views
Solder reflow pure nickel strip to PCB ENIG pads
I've arranged for a custom shaped strip of pure nickel that I intend to solder to ENIG pads on a PCB using reflow/paste.
Will we have problems getting the solder to adhere to the nickel? Is there a ...
0
votes
0
answers
77
views
QFN-28 REVERSE Breakout Board
I am trying to build a PCB board that I found on GitHub. In a rash we ordered few sets of the PCBs without inquiring about the parts availability. Turns out one of the parts is not available in all ...
0
votes
1
answer
128
views
SMD pad size for custom component
I'm trying to reflow a custom shaped strip onto a PCB, but I'm unsure about what size pad I need on the PCB.
The strip is 13mm x 6mm x 0.3mm.
The PCB surface finish is ENIG.
The pad is likely to be ...
2
votes
2
answers
109
views
Can you attach a connector meant for a rigid PCB to a flex PCB?
Is it possible to connect a standard mezzanine connector to a flex PCB?
I.e. could I use a mezzanine connector meant for connecting two rigid PCBs in a situation where one is flex and one is rigid?
0
votes
4
answers
195
views
Is there another component on the pcb that will extend the leg of the component?
In order to realize the event I mentioned in the picture below, I need an auxiliary component. Maybe a component where I can extend one of the holes 5 mm to the side. Or 5mm to 10mm dip adapter. Is ...
0
votes
1
answer
107
views
How to connect 2 (and more) PCBs together to make them semi-modular? [closed]
So, I want to design PCBs with some LEDs on them and connect them together. The PCBs are about 2 cm wide and connection has got to be on this sides of the PCBs. I've tried some connectors but ones I ...
-1
votes
1
answer
478
views
What's the best way to solder these fine pitched connectors/pins?
During a replacement of a camera mother board, I managed to screw up one of the ribbon connectors, by tearing it right where the ribbon slides into female slot. I am unable to find any replacement ...
1
vote
1
answer
158
views
Point-to-point building of medium- frequency circuits, ground plane implementation
I build audio projects and small logic control circuits using point-to-point on perfboard (see pic of a recent build).
As you can see this allows me to select wire gauge in accordance to the currents ...
0
votes
0
answers
78
views
INA219- I2c bus weird behavior
I have a PCB assembly where I built the circuit in the schematic below. I did not start programming yet.
I'm getting the weirdest problem. When I check the voltages in the SDA and SCL lines (which ...
0
votes
1
answer
512
views
Reflow soldering with temperature-sensitive components and without a reflow oven
I need to assemble and test a rather large (40x30 cm) board with single sided SMD parts, Sn Ag Cu solder (officially 217°C melting point). Usually I place group after group of components and locally ...
0
votes
1
answer
63
views
2 Layer PCBA routing strategy for high current design
I have a very simple pcba design. The only thing of value is that the traces will carry up to 30A of current.
I have already decided to increase copper thickness to 2 oz for improved current capacity.
...
4
votes
4
answers
6k
views
Is there any difference between Silicone and RTV
I've used silicone RTV that's intended for use on PCBs and have also used 100% silicone purchased from the hardware store to use on PCBs. I was not able to tell a difference between the two. ...