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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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:
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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 ...
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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 ...
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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, ...
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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 ...
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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?
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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 ...
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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-...
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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 ...
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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 ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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/...
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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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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 ...
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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 ...
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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 ...
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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 ...
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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).
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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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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 ...
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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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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/...
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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 ...
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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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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....
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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, ...
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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 ...
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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,...
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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 ...
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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. ...
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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 ...
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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 ...
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Hole drill sizes >1mm in Eagle?
I am currently trying to build a package for a through-hole potentiometer in Eagle Cad and I want to incorporate holes in my PCB for the metal tabs on the side of the pot.
I determined that these ...
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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 ...
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