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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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How to clean excess solder from very small through-holes on a PCB?

I am trying to desolder a micro connector, and one of the through-holes where the connector legs are soldered is so small that I cannot remove the excess solder. I have tried using flux, adding new ...
condor12's user avatar
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Does KiCad no longer support THT footprints for home soldering of pin headers? [duplicate]

I cannot find any connector that will simply allow me to make a PCB with THT holes for me to solder my own pin headers. The best I can find online is this link which identifies parts which I cannot ...
Hektor's user avatar
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Running traces across THT footprints

Will this work, knowing that I'm running traces across THT footprints? Kicad lets me do it, but will PCB manufacturers be able to print the board? On the other hand I had no other choice as I might ...
brunobhr's user avatar
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1 answer
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IPC 7251 annular ring meaning

When looking at IPC-7251 Table 3-3 (see the table in Sergei Gorbikov's answer at How to determine annular ring width for thru-hole pads?), for a through-hole pad in Level B the annular ring is given ...
John Arg's user avatar
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1 answer
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PTH Pad too close, how to resolve?

I have settled on this component for our spin dials: https://www.digikey.com/en/products/detail/cts-electrocomponents/292V1X24A/12091626 Problem is, in fusion pcb my pads nearly touch, while the holes ...
Wes Ellgass's user avatar
8 votes
4 answers
2k views

How should I wire my circuit onto a perfboard?

I have built this circuit on a solderless breadboard, and now I want to build a permanent version. I have all the parts, I want to build it today. How should I put this on a perfboard? Note that I am ...
Mattman944's user avatar
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2 votes
1 answer
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What is this HDMI connector?

I'm trying to identify this HDMI connector. The marking on it says TCF but I haven't found a manufacturer with that name or any other info based on that. I went through the Digikey, Mouser and Molex ...
Mich R's user avatar
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2 votes
2 answers
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Footprint for potentiometer with support pins

I am trying to add this: potentiometer to my design. As you can see, it also has two pins in order to support it structurally. This is the datasheet if anyone is interested: https://www.tme.eu/...
user1584421's user avatar
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SMD Potentiometers, with long and standing wiper

I am trying to find a component, but I am not sure if such a component exists. I want the potentiometer with the standing wiper, like this: However, all the potentiometers that I find of this type (...
user1584421's user avatar
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1 vote
2 answers
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NPTH through SMD pad

I'm trying to incorporate this design for an 18650 battery clip into my PCB. I'm using KiCad. If you look at the datasheet, you'll notice that there's actually two tabs sticking down from both ends of ...
Vital Duval's user avatar
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Why are SMD components not good for high power applications?

I have been using this capacitive power supply to drive a circuit (an OP amp and relay), but what I can't understand is that when I tried using an SMD resistor (R2) after some testing (turning on and ...
Hazardous Voltage's user avatar
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1 answer
137 views

How can you tell if a resistor is SMD or THT?

In my small project, every type of component I am using (inductors, capacitors, ICs) has something to indicate that is a surface mount type except for the resistors. I need to know so I can select the ...
Matthew3302's user avatar
0 votes
1 answer
84 views

What IPC standard guides on the design of through hole PCB pads?

Through hole PCB pads need an annular ring and will have other details like the solder mask clearance. For pad that shall be used to solder component leads, I believe that there is some IPC guidance ...
quantum231's user avatar
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Best LCD for mass production

I'm designing a PCB that will be manufactured in small batches (a few hundreds). It will have a segment LCD with electronic components under it. I cannot choose between two form factors - with SMD ...
Archimedes's user avatar
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1 answer
113 views

SMD components and PIC microcontroller

I'am working on a digital clock project with a PIC16F877. I'm designing the PCB with Proteus. The PCB contains mostly SMD components and I don't have any experience with that so I have some questions: ...
Line Follower's user avatar
12 votes
12 answers
3k views

Why are there no single logic gates in through-hole packages?

If I'm not mistaken, single logic gates (i.e. a single NOT, OR, NOR, AND, NAND, XOR, etc.) do not exist (anymore?) in through-hole packages. At least, on Digikey, when searching for active in-stock ...
Sandro's user avatar
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1 vote
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Stereo audio processor: help with capacitors

I'm building a small audio processor board that uses the Silan Microelectronics SC7314 and exclusively THT components. I've recycled this chip from a malfunctioning Philips Home theater. The thing is ...
fpp's user avatar
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1 vote
3 answers
415 views

Soldering through-hole components when using ground/Vcc planes?

I'm designing my first PCB (2-sided) and can't quite understand. I'm going to be soldering the through-hole components myself such as the resistors. Typically, I put a leg through the hole, heat them, ...
D P's user avatar
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0 votes
2 answers
170 views

Vias for through holes wires such as interconnects & jumpers

I'm going to have some PCB designs fabricated online. I'm quite new to it & I've never actually used KiCad as well for the designing PCBs the whole process. So I have a few questions. I need ...
Tempus Nomen's user avatar
3 votes
1 answer
325 views

Pads on multilayer PCBs

When we are dealing with multilayer PCBs, are the component pads (through-hole) present on all layers, or just on the top and bottom layers?
Jonathan_the_seagull's user avatar
14 votes
1 answer
2k views

Are surface mount or through hole connections more reliable for safety critical applications?

While obviously factors like safety certifications and margins of error are more important when it comes to safety critical applications, e.g. aerospace, I saw an article that said that one of the ...
Aidan Connelly's user avatar
5 votes
4 answers
2k views

Through holes vs pads for hand soldering

I am currently designing my first PCB to be manufactured by a fab (I am using JLCPCB). The base material that JLCPCB offers is FR-4 TG130. In that design, I have a few wires that would need to be hand-...
Dakkaron's user avatar
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1 vote
1 answer
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How to best power small loads from 1.5V batteries in a kit? [closed]

I'm trying to build an electronics kit (so THT parts only if possible) that I would like to power from a single AA battery. The circuitry on the kit uses 3.3V 74HC series CMOS parts and should ...
FUZxxl's user avatar
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1 answer
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Can through-hole leads be cut level with the PCB back while maintaining good connectivity?

If I'm using confusing terminology I apologize, this is relatively new to me and my first post on stack exchange. My question is: Can through-hole leads be cut and filed level with the PCB back while ...
Flat's user avatar
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0 votes
1 answer
169 views

How to store bits asynchronously without clock resetting all bits?

I am working on a circuit that has 8 buttons that need to hold the value once pressed. I'm currently using a 8 bit flip flop (74LS273 in the diagram). The problem is that all bits get reset on the ...
Redyne's user avatar
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11 votes
5 answers
3k 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?
the five states's user avatar
9 votes
3 answers
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 ...
TypeIA's user avatar
  • 2,416
2 votes
1 answer
419 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 ...
user11271728's user avatar
0 votes
1 answer
209 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 ...
user2003052's user avatar
8 votes
2 answers
1k 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 ...
Your Uncle Bob's user avatar
3 votes
2 answers
544 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 ...
r4f43ll's user avatar
  • 31
4 votes
1 answer
2k 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.
user7586189's user avatar
13 votes
6 answers
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 ...
Sam Washburn's user avatar
1 vote
2 answers
7k 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/...
user1584421's user avatar
  • 1,369
0 votes
1 answer
286 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 ...
user1584421's user avatar
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1 vote
2 answers
1k 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 ...
akshaykumark's user avatar
1 vote
3 answers
3k 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 ...
anotherlin's user avatar
1 vote
1 answer
272 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 ...
JPMorgan's user avatar
0 votes
1 answer
56 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 ...
Blup1980's user avatar
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4 votes
2 answers
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).
NeverWasMyRealName's user avatar
3 votes
1 answer
441 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 ...
Rik Roukens's user avatar
2 votes
1 answer
290 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.
Ahmed Emad's user avatar
10 votes
1 answer
3k 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 ...
komto909's user avatar
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1 vote
2 answers
308 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 ...
ardnew's user avatar
  • 115
2 votes
1 answer
98 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 ...
circuit_noob533's user avatar
0 votes
2 answers
114 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, ...
kellogs's user avatar
  • 1,062
9 votes
8 answers
3k 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 ...
Doug12745's user avatar
  • 319
1 vote
1 answer
2k 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 ...
Ngô Hữu Nam's user avatar
3 votes
2 answers
2k 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 ...
Saunders's user avatar
  • 526
1 vote
4 answers
1k 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 ...
daigs's user avatar
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