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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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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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Does Solder paste file is necessary for through hole component as same as SMD or not?

I have designed a PCB and there are only through hole components in the top of my board and only some surface mount components in the bottom of the board. Now, I don't know exactly is TOP SOLDER ...
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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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152 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 ...
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66 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 ...
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1answer
204 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 ...
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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 quitte irregular shaped pad: ('round' pad shape with slot hole, and then a small cutoff in the ...
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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 ...
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152 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 ...
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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 ...
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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 ...
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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-...
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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 ...
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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. ...
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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 ...
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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 ...
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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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487 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 ...
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Can you put a through-hole part behind an SMT part?

I'm wondering if it's possible to place a through-hole connection on the opposite side of an SMT microcontroller. I have a small connector with a solder pin (for the shield) on one side of the board, ...
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285 views

Altium pads and holes print PDF

I'm trying to print a PDF to put my PCB design on copper, and I get the PDF document and everything seems to be alright but when I print my design the pads are filled in black. PDF Output And this ...
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Routing through-hole USB port

The difference in lengths of the differential pairs are tremendous, which is quite evident in the screenshot. I just don't see how I am supposed to length-match this. Tips will be appreciated!
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284 views

How to solder through-holes for quadcopter boards?

Its a flight controller for multicopters. Should i stick the wires from the top or bottom, and should i solder the top side or bottom side? I searched on youtube, but there is no definitive way to do ...
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How are through-hole boards mass-produced?

I'm familiar with the manufacturing process of surface mount boards. Chips come on reels (very high volume smaller parts), trays, or tubes. They are loaded into pick-n-place machines. The PCB, with ...
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125 views

D1 mini - pin hole / track repair

I've just bought a very bad quality D1 mini board. While soldering pins, I made rookie mistakes and I had to desolder, then (really bad) pads got detached from pcb. I certainly don't have experience ...
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979 views

delete drill layer in eagle without redoing board

When I go to make my own circuit boards with eagle, after saving, I run the drill-aid.ulp script so eagle can convert all over-sized drill holes to small size. It helps me with drilling. I then saved ...
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2answers
258 views

drilling pin header holes when exact drill size not locally available

I checked all of the hardware stores in my area and I can buy 1/32 (~ 0.79mm) and 3/64 inch (~ 1.2mm) drill bits. No source in my area carries bits which are between those two sizes which would then ...
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THT decopling capacitor spacing from the TQFP uC's power pin

simple question - how close can the uC's power pin (TQFP pad) and a ceramic cap's PTH pin can get so the PCB fabrication process or later exploitation would not go wrong ? Some ballpark figures for ...
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1answer
479 views

What is this IC “D4164D”

I found this component lying about, anybody have any idea what it is? I found a few people selling them on ebay but no description. The label says, "NEC 208 D4164D" Thanks,
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238 views

Recommended pad size for desoldering?

I am designing a PCB that has will hold an Arduino Micro, as well as other components. One of the electrical engineer mentors that are overseeing the board development has told me to increase the ...
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2answers
2k views

Flush Mounted Threaded Through Hole on PCB

I am looking for the name of the component in this picture: Does anyone know off the top of their heads? I'm working on designing a product that requires 2-56 threaded holes in a PCB, and I need ...
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1answer
188 views

Unsolder large TO-220 or TO-247 packages

I'm aware this question may be construed as asking for advice but I'm going to venture to ask anyways. Does anyone have a good method for removing larger TO‑220 or TO‑247 packages? I ...
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104 views

is it possible to replace the metal on the bottom of a PCB?

I attempted to drill three holes slightly bigger on a circuit board. As soon as I touched the board with the drill, the metal that you solder contacts to separated from the board. I want to know if ...
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1answer
437 views

Shrinking drill hole size in Eagle

The last time I did a successful PCB, the drill hole size relative to the component pad size is rather huge to the point where when I entered the soldering stage, the component wires were not ...
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2answers
403 views

PCB Through Hole Pattern for Non-Standard Wide DIP-6

Should I use a 2.75mm pin pitch for this Fairchild MOC3023TVM, or should I stick with 2.54mm(100mil) spacing? Notice the alignment on the dimensions from the datasheet in the figure below (2.75mm = ...
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165 views

Connectors in high volume manufacturing?

How are connectors such as USB handled in high volume manufacture? Would the panelized board leave room to place these connectors or would the panel be cut apart and the connectors added later. Is ...
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1answer
738 views

Altium - How to Convey Pin-In-Paste Technology in Design

I am working on the first board design I've done with a connector that requires pin-in-paste (aka. "paste-in-hole") soldering. We are trying to expedite the manufacturing process so we are leaning ...
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1answer
663 views

Mounting through hole package on busbar

Through-hole components are not designed to be busbar mounted. But I have the need to use "laminated" busbar because of some factors (among others): High current Small parasitic inductance Power ...
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704 views

Desoldering a TO-220 MOSFET from a plated through-hole board with SMD complications

I'm planning on replacing a TO-220F package MOSFET on a through-hole circuit board that also has SMD components on it. In this case, an SMD capacitor is connected to the source gate of the MOSFET by ...
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Through board connector

I'm looking for a connector. Ideally it would be a one pin connector mounted on the back side of a board and the pin would come through the board into connector. Here's an illustration: Does such a ...
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4answers
990 views

Is Saving Through-Hole Components Viable? [closed]

I recently got my hands on some old electronics. After getting some to work and failing to get others to work, I decided to simply desolder some of the through-hole components to possibly use in ...
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1answer
4k views

Through-hole footprints: pad size from technical drawings

I'm creating some footprints for through-hole components in KiCad, and I've got some issues determining the correct pad dimensions from manufacturer's technical drawings. As an example, here's the ...
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1answer
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Are PLCC Chips/Sockets always the same pitch?

I'm hunting down a socket for a PLCC-84 chip and none of them mention pitch spacing. Is that because PLCC is always the same spacing between pins?
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1answer
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Pastemask. Manufacturing PCBs

after finishing some designs, it is time to manufacture and assemble them. For making these designs I have to create all padstacks, footprints, etc from scratch, so I took PCB Editor examples as ...
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2answers
779 views

What hole size for test probe to get a snug fit?

I’m designing a bed of nails test jig. I want my test probes to fit snugly in the circuit board, but want to allow for variation in the through hole plating of the hole. In Altium, when you specify ...
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1answer
8k views

How do I design a through-hole pad in Altium Designer?

I want to define a custom component (TO92 temperature sensor) in Altium Designer with through-hole pads (0.7mm hole diameter, 1.27mm pitch). What is the right way to do this? I I created the ...
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2answers
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Purpose of oval/oblong PCB through hole pads

What is the actual purpose of using the oval/oblong pads that are commonly used for ICs? Everywhere I read the answer is the possibility to allow a track between the pins, but as long as the pad ...
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Drill hole size suggestion for this pass-through socket

I'm considering using this pass-through socket for a project. Since I'm newer at this, I was wondering what size through-hole would be best? This socket will solder in, so I understand that I can go ...
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2k views

Using a mixed technology, SMD and THT components in one PCB

I want change design from Through-hole technology to SMD design. Some components have no SMD version, for example some transistors in TO-92 package, and Power Mosfets, which available in DPAK SMD ...
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1answer
808 views

Solder through-hole or surface-mount components first?

I am new to surface mount soldering. On a board with both SMT and through-hole parts (header pins), which parts should I solder on first? I imagine the technique I use for SMT soldering is important....