Surface-Mount Technology (SMT) refers to the way components are mounted on a PCB: SMDs (Surface-Mounted Devices) have pins or contacts which lay on top of the PCB's pads, without the need for holes in the PCB.

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89 views

smd resistor and regular through hole resistor

My question is fairly simple. I am building an SMD LED board and i am limited in space. So originally i was planning on going with through hole resistors, but have it being i'm very limited on space ...
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3answers
309 views

Can I use thermal paste instead of solder for a SMD heat sink?

I have some high-power (~5W) SMD LEDs that I will be running for extended periods of time. I would like to use a PCB mill to make breakout boards for these chips for easy prototyping. Ideally I would ...
-1
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0answers
41 views

What good pcb manufacturers do you know that can also assemble smt components? [closed]

I don't know if this is the right board to ask this but since it's electronics related i think it fits. I need to find a good pcb manufacturer that can make withing a reasonable price small to medium ...
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0answers
16 views

how to extract Pick and place file form .asc file?

I have Gerber data along with .asc file. Is it possible to get pick and place file from it using G.C Power Place software?
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1answer
53 views

Will an 0603 capacitor fit on an 0805 pad?

I am in a pinch and just submit my final board design to a pcb house. Unfortunately, I messed up the design and had an 0805 pad in a spot where a an 0603 should have been. I will be getting the boards ...
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2answers
46 views

list of general purpose smd transistors, diodes and mosfets [closed]

I want to start with building up a little stock of smd components. But i'm not sure where to start. Is there a list of general purpose smd Transistors, Diodes and (mos)fets? Thnx in advance
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3answers
93 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
54 views

SMD package sizes in Altium

I'm a little confused about the standard SMD package sizes. Say I have picked some capacitors, and their package is 1005 (0402). Would this have the exact same footprint as a resistor or inducor with ...
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0answers
31 views

Power MOSFET 27N3LH5 for SMT design

I want change existing through-hole type PCB design to SMT design. The existing design use Power MOSFET 27N3LH5 in TO-220(DIP) package and with Heat Sinks in output channels. The SMD version of ...
4
votes
1answer
89 views

What is the name for gold plated docking station contacts?

I design a device that must connect to the docking station which has spring loaded pins. I'm looking for gold plated contact for the device side (sample shown on the picture), so these contact pads ...
1
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1answer
65 views

SMT reel: taking a couple of parts off the reel

I have a couple of SMT parts that I ordered "digireels" for - i.e., essentially tapes wound around a spool, with some leader tape attached at the front. This is good for the pick and place machine - ...
2
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1answer
72 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 ...
2
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1answer
87 views

how to program the smd atmega328

How do you program the smd atmega328 ic in an inexpensive way?I know you can get a factory to program the chips but is there a way to program them with arduino without one of those expensive sockets. ...
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1answer
50 views

How to determine BGA land pad diameter for given ball diameter?

I'm working on a project which requires the use of a CSP package. The product's datasheet provides ball pitch in each axis as X:710um Y:580um and ball diameter as 250um but nothing about the preferred ...
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1answer
42 views

Pad size of power jack

I want to use a dc power jack in my circuit, and I chose this. After eagle does not have this schematic, I have to draw it on my own. Unfortunately I do not understand the pad size dimensions. It ...
0
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1answer
44 views

Replacing a Piezo with a button

In my senior engineering design class for high school, my teacher bought a toaster oven and microcontroller and tasked my group to make surface mount digital dice kit for him to teach surface mount ...
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0answers
25 views

SMD thin/thick film resistor in external Magnetic field

I have an application where the need is to use SMD and MELF type resistors that have tolerance of 0.05%. I prefer the Vishay thin film resistors. Then comes another constrain -> The entire PCB needs ...
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3answers
115 views

What soldering kit for tiny electronics? [duplicate]

This is a my first foray into building electronics. I am building a project that uses chip/SMD LEDs and resistors. What type of soldering kit should I be using for those devices?
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1answer
49 views

What's the ID nr of this SMD transistor?

Need to replace this transistor, SOT-23. Any ideas on ID?
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1answer
69 views

Which SMD footprints can be hand soldered and which can't? [closed]

This was the first question I had once I was given a project that didn't restrict the use of SMD components. I feel like there are a lot of different SMD footprints out there, and surely it's been ...
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1answer
70 views

High Power LED connected to Dry battery

I am new to electronics as i love working with circuits. I have 12V 6W SMD LED, which I want to attach with Battery Powered Driver which currently gives me from 10v-14v DC with 50mAmp. Shall I connect ...
0
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1answer
62 views

IC chip for PCB to stabilize 12v input?

Hi I'm wondering if there's any SMD IC chip to stabilize a 12v input to a stabilized output? I need something like that to regulate power on PCB. Thank you.
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2answers
59 views

Is there a way to fix a unsoldered SMD decoupling capacitor?

I'm rather a newbie regarding electronics but I came here to seek for a simple response. I realized that a electronic appliance I have doesn't work anymore. I tried to investigate the issue and found ...
2
votes
3answers
109 views

Is it possible to solder this non-standard package (sim900) using hot-air station?

I don't have any experience with hot-air soldering. Would it be possible for a complete newbie to solder this kind of package using a hot-air station: I only need to solder pads closer to the edges ...
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2answers
114 views

How do I solder a surface mount (smd) voltage regulator?

I have a PCB in front of me with a surface mount 5V voltage regualator. I'm wondering how I got about soldering this with just solder (I don't have paste). I have heat paste, but I'm wondering if ...
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0answers
115 views

Tips for soldering delicate smd ICs without smd equipment

Lets say I have a physically rather delicate part like a MAX6143AASA50 (a SOIC-8 package, the one I am going to solder, but the exact chip doesn't really matter) and want to solder it, but don't have ...
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2answers
74 views

Figuring out pin configuration for a small SMD transistor

The data sheet of the dual transistor IMZ1A shows pin layout as: But the chip I received looks like this: There is a small dot on top left, but according to the datasheet, pin 1 should be on ...
2
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1answer
40 views

How robust are SMD DC power inlets compared to through-hole?

Normally it takes a reasonable amount of force to push in a (say) 2.5mm DC low voltage plug into a PCB mounted socket. For that reason I have normally only used through hole devices. How do the SMT ...
21
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6answers
1k views

How to hold SMD parts in place while soldering?

I go through this every time I have PCBs I need to populate with SMD parts, and this has become more an issue as pin spacings have gotten tighter, and my hands have become less steady with age. So ...
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2answers
96 views

How to break out SMD chips in-circuit?

For a current project I am attempting to amplify and cross-wire the signals from the address pins of SMD RAM chips. Basically this means I am trying to break out the pins of a SMD chip, similar to how ...
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2answers
459 views

Eagle - export pick & place file

How do I export/generate an pick & place file for my board in CadSoft Eagle? Is there a standard (like gerber) for pick & place machine files?
2
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3answers
179 views

Violin bow position tracking with SMD LEDs and photoresistors

Objective: Marking labels indicating the positions of the violin bow on an acoustic signal, for example, a single musical note played by a full-length bow. The following video shows the example I am ...
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1answer
72 views

Any help identifying these parts and their purpose

Short: I'd like a manufacturer identified. Long; I've been tearing apart old electronics and looking at them to see how they work and getting caps, op amps, transistors, small logic circuits and the ...
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3answers
526 views

0805 LED on a 0805 resistor footprint?

The LED in question is described as 0805 dimensionally. However, the footprint in the PDF is different from that described as being suitable for a resistor. For example, the gap between the anode and ...
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2answers
86 views

Standard SMT button size? [closed]

I need an SMT pushbutton on my PCB. I'm drowning in options on Mouser and just want to select something that is future-proof. Is there a standard size and footprint for pushbuttons that I can use to ...
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2answers
100 views

Use expensive or inexpensive capacitor for decoupling

I'm in the middle of a project to create a small development board using a 100Mhz Cortex M4 MCU and have to buy some decoupling SMT capacitors. I've found the following options: Cheap 10 cent from ...
1
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1answer
329 views

Altium Creating Custom SMD Pad Shape

I tried to create a custom pad shape in altium desginer 14 for my pcblib but i missing a option in altium to assign a designator to the region. i already assigned solder/paste mask and now placed a ...
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0answers
22 views

Murata SMD External Drive Pizeo from SBC

I would like to drive a Murata SMD from a SBC (Arietta G25) with a 3.3v Logic PWM output. I've looked through the Murata catalog and seen the examples however I'm still confused as to how the circuit ...
0
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1answer
108 views

Solution for broken pin repair (SMD(SMT) components)

While I was working with a IS62WV51216BLL-55TLI, I broke off by chance a pin at the base near the component body. that's perfect! LoL! It makes me to think about this question: Can we fix such ...
7
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3answers
398 views

Find first pin of a LQFP chip

I have bought some ATSAM4E8C chips in LQFP 100 package. The datasheet shows that the IC should have a dot indicating the first pin, but mine have two dots. One larger in the corner, and a smaller ...
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1answer
135 views

How to program a msp430 without bootloader or ISP connector?

I'm looking for a way to program a msp430 microcontroller in-circuit and with all the components SMD, including the ISP connector. Could, in this case, USB still be an option?
2
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2answers
213 views

Need help with a vertical mount, male A USB connector

I need to figure out a way to get a Male A USB connector to vertically attach to a PCB. Ideally, we wouldn't use a surface mount right angle connector. Any help would be greatly appreciated! Most ...
3
votes
2answers
104 views

How to manually place 0.5mm pitch bga

I'm a hobbyist and I'm trying to place a 0.5mm pitch BGA with tweezers. I've yet to land the chip properly on 3 attempts. At ~$30/board, I need a better way. What are my options? I've seen some DIY ...
0
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1answer
375 views

Esp8266 (esp-03) breakout

Recently, Hackaday is talking a lot about the esp8266, a wifi to serial chip. I want to use the esp-03, a breakout with half-hole connectors that has 2mm pitch. Is there a breakout board that can turn ...
1
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2answers
670 views

SMD size 0805 vs 1206

Using SMD to make the PCB smaller is an easy choice but I'm wondering if using mainly 0805 size is really worth it compared to 1206. I don't want to store a mix of both. These are some pro and cons, ...
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votes
1answer
101 views

Can i replace a 0.75A 76V SMD fuse with a 1.25A 250V one? [closed]

It's for an LCD TV inverter. The seller said I could even use a thin wire. I'm not sure about that that's why I still bought it but I want to make sure before putting it in. It seems that it's for ...
1
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0answers
120 views

Surface Mount vs Through Hole Aluminium Electrolytic Capacitors?

What are the differences between SMD and TH Aluminium Electrolytic Capacitors? Why are TH variants available with such greater lifetimes? (For example, Digi-key has SMD aluminium caps up to 10k hours, ...
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0answers
78 views

Why are there so many SMD resistors near CPUs and GPUs? [duplicate]

I'm not really sure if these SMDs are resistors or capacitors, but I've always wondered the purpose of them. Supposing that they are resistors: Do they work as a sort of protection measure? Current ...
1
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3answers
175 views

Need help with an LED flash circuit

I joined just because I'm having sort of a dilemma. I need to design a flash circuit for a tiny SMD based project, and I have a way of doing it, but I want to see if I can make it better and I haven't ...
1
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2answers
187 views

Choosing an SMD LED size

I am designing a PCB an need an LED on it. I'm going to direct the light from the LED using a light pipe, so I need it to be as bright as possible. The question is what size I should use? All the ...