Questions tagged [through-hole]

Through-hole technology refers to the mounting scheme used for electronic components that involves the use of leads on the components that are inserted into holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side.

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11
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5answers
2k views

Does the PCB have to be thinner than through-hole pin length?

If I have a part that has pins that are 1.2mm long. Can I use a PCB that is 1.2mm thick or does it need to be even thinner than that?
7
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3answers
1k views

PCB routing: isolate through-hole pins to force routing through decoupling capacitors?

I'm a beginner in PCB layout, and have a question about decoupling capacitor routing in through-hole designs. I know that in SMT design, best practice is to place the capacitors as close as possible ...
2
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1answer
84 views

KiCad leave room for optional through hole resistor on top of default SMD?

I was wondering how one would go about creating a footprint for an SMD resistor leaving room for a through hole one to be soldered on top should one wish to adjust the value, a bit as seen on this PCB ...
0
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1answer
62 views

Is cutting through hole leads done by hand or machine when wave soldering?

If machines exist, can someone provide some info on what to look for. I'm aware of the frames for doing it by hand. I'm curious how to keep the parts in place once the leads are cut, ie don't shake ...
8
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2answers
675 views

Drill through PCB or just use glue to mount component?

For a one-off hobby project I want to add a potentiometer to an existing two-sided PCB. There is an unpopulated zone (as far as I can tell) on the PCB that looks ideal, but I'd have to drill mounting ...
3
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2answers
497 views

Unknown through-hole component

My question regards a component I found in the output circuit of f/U (frequency to voltage) signal converter (Noris Tachometerwerk RV43A 0-3767Hz to 0-10V). See the red box below on the PCB photo. I ...
3
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1answer
1k views

Solder SMD on through hole

Can I just solder an SMD part directly on the through holes of the PCB? The pitch of SMD matches the pitch of the through holes.
12
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6answers
2k views

Tips for optimizing through-hole soldering

I make and sell low voltage, mostly digital, retrocomputing expansion boards as a hobby/hustle. I use all through-hole components partly because of the retro aesthetic and partly because I find ...
0
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2answers
655 views

KiCAD: Footprints for {Axial, Horizontal, Through Hole} Resistors

I have these two resistors in my schematic, that i want to find footprints for: Body dimensions = 2.5 x 6.8mm AND Leads dimensions = 0.6 x 28mm (like this one: https://www.acdcshop.gr/...
0
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1answer
83 views

Questions about pushbuttons - through-hole or SMD

I am designing an Arduino shield in KiCAD. I have to have a reset button, so I got these buttons. As you can see, the pins are really long (I extended the pins in one of them.) How are these buttons ...
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2answers
381 views

SMD vs. THT Difference [closed]

I want to know the difference between surface mount device and through hole components other than the mounting style. Differences such as if the through hole counterpart of the surface mount device ...
1
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3answers
1k views

Through hole solder pad dimension rules?

Is there an electronic rule or just a rule of thumb regarding through hole solder pad dimensions? That is, if I have a 0.025 inch diameter drill hole (suitable for 24AWG wire), what should be the ...
0
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1answer
86 views

Placement of Through Hole with a High Tolerance Dimension

Beginner question here. What does one do about the placement of the through hole when one dimension of the part has a high tolerance. For example, I place the through hole anticipating the center of ...
0
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1answer
43 views

Through-hole LED package identification

I am looking for a way to search for a replacement LED. Unfortunately I don't know the name of the package. The LED has a kind of conical recess at its tip to diffuse the light sideways instead of ...
4
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2answers
1k views

What is a 'piano THT' footprint for?

What is the 'piano' THT footprint for? Are these used for signal probing? See the second layout, as different from the first (KiCad ScreenGrabs).
2
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1answer
97 views

How do I solder thick goldplated DIA pins?

I am struggling with soldering some pretty think gold plated DIA pins to one of my boards. I've tried various things such as; Increasing the heat of my soldering iron, but am afraid of burning my ...
2
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1answer
197 views

PCB electroplating then etching

How can I protect the through holes copper which is electroplated from being etched away by the ferric chloride? Is there a resistive solution or it`s just the conductive ink.
10
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1answer
2k views

Which is better - components on both sides or components on one side of the PCB?

I am working on a PCB design. 50k PCBs will be produced. SMD components: 100 Through-hole components: 25 I need to minimize PCB size. There are no high-speed signals or sensitive signals in the ...
1
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2answers
207 views

Where can I look for USB 3.x superspeed mux chips for poor people that only have through-hole soldering tools?

I'm new to this realm of purchasing and I'm not exactly sure which of the different package names (SSOP, VQFN, etc.) are more friendly than others for basic through-hole soldering. I would also be ...
2
votes
1answer
91 views

What does this fabrication rule do?

Does the part that says, "Plate Through Holes with copper, 0.001" thick min" mean that 0.001" hole plating will be applied to all plated holes? I am new to the fabrication process and I am wondering ...
0
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2answers
75 views

drilling SMT footprints for fitting THT parts

I have bought by mistake some THT caps instead of SMD and would like to use them still. They were bought from a supplier who has the bad habit of not answering customer requests. These are 5000h caps, ...
9
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8answers
2k views

Assembly of PCBs containing a mix of SMT and thru-hole parts?

I have a batch of beta PCBs which we have to assemble in our lab. We have an APS manual pick-and-place machine and a tabletop reflow oven so I thought assembly tomorrow would be easy and straight ...
1
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1answer
632 views

Any way to surface mounting a through-hole resistor?

I need to solder a 2W through-hole Resistor on one side of pcb, mean like smd component but this is for through-hole resistor. I google and found there is a way call ...
3
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2answers
1k views

Eagle Drill vs. Diameter Parameters when making Through Hole Parts

I am working on making footprints in Eagle for a through-hole connector I want to use. I am running into some issues as I try to determine the appropriate diameter and drill size I need for the ...
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3answers
731 views

Copper dimension around the PCB component's hole (pad?)

I had my first PCB manufactured (by a Chinese manufacturer). In this first version I only used thru-hole components (not SMD). I used the latest version of Eagle to design it, without taking care to ...
0
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3answers
271 views

Why are THP 1/2W resistors bigger than 1/4W while 1206 resistors are all equal?

How come THM (through hole mounting) 1/2 W resistors are bigger than their 1/4 W or 1/8 W counterparts, while SMD 1206 1/2 W and 1/8 W resistors are equally sized?
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0answers
69 views

Reason for stepped pins on M12 circular connector

I've been looking at M12 circular connectors for a project I'm working on (for example this one, drawing here), and I've noticed that many/all of them have stepped pins that create a 3mm or so offset/...
6
votes
1answer
967 views

THT: What is a squared annular “ring”? [duplicate]

At least in KiCad, the footprints of through-hole pin headers have one squared annular “ring”, the other ones are round: What does the square indicate? (Also I’m wondering if there is perhaps a ...
2
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0answers
202 views

NeoPixel THT: Varying pinouts [closed]

I am in the process of designing a PCB for a solder kit that receives NeoPixel type LEDs, the ones with the short head: Now, there seem to be different pinouts: Ordered on Amazon.de as WS2811 LED ...
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2answers
783 views

What solder for low temp removal and resoldering to pcb

Have an issue with some legacy system - need to replace throughhole parts on PCB in situ while PCB is sandwiched between two sheets of acrylic with only small holes to access the leads on one side (i....
6
votes
1answer
2k views

Edge-mounted vias... or how is this called? And can PCBs services manufacture it?

As you can see, the through-holes (vias) are at the border of the inner cutout. (rendering is wrong of course, as vias are not cut) I imagine a manufacturer first prints the board and then cuts it, ...
0
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2answers
445 views

Reed Switch Failure Modes

I've been playing with these through hole reed switches: MDSR-4-12-23. It has been my experience so far that you have to be very careful in handling them, including when bending the leads to 90 degree ...
0
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2answers
959 views

Is the solder paste file necessary for through-hole components?

I have designed a PCB. There are only through hole components on the top layer, and only surface mount components on the bottom layer. Is TOP SOLDER PASTE file necessary to send to the PCB fabricator,...
0
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0answers
93 views

Can I use SMD components or do I have to stick to through hole?

I work in a company which develops devices that need to withstand harsh environmental conditions, shocks, radiations, vibrations and whatever. Really, too many to count. In one of those devices is a ...
7
votes
2answers
1k views

What is this component thingy?

I can’t find or describe what this component looks like. Out of curiosity, what is it? I found it on a PCB for a car alarm, but it has no silk-screen label... It has a grub screw that is adjustable. ...
0
votes
1answer
187 views

Through-hole solder sparking

Here is a simple example of what been happening to various pcbs when I play with them. I have an arduino powered by USB. Then a 5V and GND connected to a logic level shifter's HIGH and GND ...
1
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1answer
900 views

Through Hole (Vertically Mounted) SMA Connector on PCB - Feasible for GNSS Application?

Due to space constraints on a board I am designing, it is ideal to have the GNSS cable connecting vertically onto the top of the board. I haven't been able to find any edge-mounted connectors that go ...
4
votes
1answer
1k views

Hole Drill Sizes >1mm in Eagle?

I am currently trying to build a package for a through hole potentiometer in Eagle Cad and I wanted to incorporate holes in my PCB for the metal tabs on the side of the pot. I determined that these ...
3
votes
3answers
3k views

How to create custom through hole pad shapes in Altium Designer?

I'm trying to create a footprint for the ACS770 current sensor in Altium Designer (17.1), which has a quite irregular shaped pad: ('round' pad shape with slot hole, and then a small cutoff in the ...
0
votes
1answer
669 views

Altium through-hole type, "slot" vs "rectangle", effect on copper pour

I am drawing a board which will fit in an enclosure with batteries. The battery terminal tabs should come up through slots in the PCB, and solder to a pad around the slot perimeter. I created a new ...
0
votes
1answer
650 views

How can I draw in Eagle non circular through hole pads?

I made a custom part footprint in Eagle for a potentiometer ACP SPAIN 22k however in order to achieve a good fit I would like to draw non circuilar through hole pads. If you look at a picture of the ...
7
votes
6answers
3k views

Noisy signals with 2-layer PCB - What's wrong with my design?

For my master's thesis in computer science, I need to read out a TCD1304AP linear CCD sensor. A STM32 microcontroller with the circuit laid out on a breadboard gets the job done, but in order to make ...
10
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2answers
3k views

How do surface mount components withstand heat of reflow while through hole components can not?

I have read some online tutorials about soldering through hole components which say that transistors and ICs are delicate components and can be easily damaged by heat. So they recommend to keep the ...
4
votes
3answers
2k views

how to place decoupling capacitors on a four-layer board for through-hole components?

From what I've read online, for SMT components there should be traces from VCC/GND pins to the capacitor and then vias to the ground and power planes. The situation is a bit different for through-...
0
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2answers
1k views

I accidentally ripped out an eyelet/pth to my PCB when changing LED lights on a mechanical keyboard [closed]

I accidentally ripped out an eyelet/pth to my PCB when changing LED lights on a mechanical keyboard. I'm am a beginner to anything like this so please use layman's terms. Please site places I can use ...
5
votes
5answers
1k views

Tiny parallel eeprom

Is there such a thing as a low pin-count eeprom IC that can be used to replace logic circuits with just a couple of inputs and outputs? I'm thinking of DIP-16 or smaller, but it needs to be parallel. ...
0
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2answers
153 views

Newbie on SMD. From THM to SMD PCB design and manufacturing [closed]

I have made a prototype of a device using THM technology. Now one of my successful friends has suggested me to move the design to SMD technology to reduce component and PCB manufacturing costs. I have ...
2
votes
3answers
336 views

Damaged Solder Joint?

So I bought a SEGA CD off ebay and everything was fine until I decided that the duct tape that was holding the battery is was a poor substitute for a battery holder. So I took my Model 1 apart begun ...
0
votes
1answer
153 views

Altium pad features and difference between Hole Size and "X-size and Y-size under Size and Shape"

Could someone please explain what the green bit in the center is and what the silver ring on the outside represents? I'm trying to create a hole of a certain size and just want to know the difference ...
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1answer
1k views

How big should my pads and holes be based on this datasheet?

I've been trying to decipher the many numbers on the top picture, and it just doesn't make sense to me. Why would you need a hole of size 1.19 mm when the pins are only 0.45x0.58 mm? This leads me ...