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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4answers
531 views

Jumper or resistor?

I have in my BOM (Bill of materials) the following component CR21- 000-T and in the datasheet of the component : CR, CJ series is specified CR21 series as 0805 resistor. But the 000 is specified as ...
3
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3answers
253 views

Tape and reel - using components OK?

If I buy a full reel of components (let's say resistors) with the intention of sending it to an assembler later so they can assemble my product, is it OK to use components from the reel when I'm ...
0
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1answer
31 views

SOJ socket to PCB

I was wandering, is there some socket for ICs (memory) with SOJ packaging? I mean one that would have contacts that could go through PCB. Like some hybrid between SOJ socket SMT and DIP socket. Or can ...
2
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1answer
305 views

Can massive ammounts of 0603 SMD 1uF ceramics displace power caps?

Edit:Warning: there's an error in one of my assumptions in this question, which more or less invalidates it. See Tom Carpenters answer. I'1m designing a switched mode power supply, and of course need ...
0
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1answer
62 views

Replace MOSFET with SMT equivalent [closed]

I want replace 27N3LH5 MOSFET in TO-220 package with SMT equivalent. Mosfet in output stage of LED driver, Power Supply +12VDC, current up to 2A per channel. Mosfets have heat-sinks, but I don't want ...
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1answer
93 views

What SMDs are these? [closed]

Just a quick question: Does anyone know what SMD are these? Thanks
-4
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1answer
75 views

SMD diode value [closed]

I need to change surface-mount diode but i need to know its value. possible your assistance to know the value of the diode in the picture. what is the value of diode in picture? or how to get the ...
1
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1answer
81 views

Can I Reverse/upside-down mount SMD LED

I've seen reverse-mount LEDs which are meant to have the light shine through a hole in the PCB, instead of straight off. Is it possible to just add a drill hole for normal LEDs and just place them ...
0
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1answer
83 views

How to identify SMD devices from the codes on top of the component?

I have a PCB and I am trying to identify a couple of the ICs and other SMD devices that are on there but can't find anything on or offline that tells me what the package codings mean. I have a couple ...
0
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1answer
93 views

Replacing a SMD inductor, alternatives?

Trying to fix a board that had a SMD inductor. it was labeled L1 on the silk and there was no marking on the part, and I have no schematics. ...or there may have been markings, but someone tried to ...
1
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4answers
55 views

Temporary SMD Adhesives? [duplicate]

When I do prototyping I solder my PCBs by hand. That works fine most of the time, but I run into a problem when I have to solder chips with fine pitch (Google for VQ100 to get an idea of what I'm ...
4
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3answers
299 views

Looking for capacitance and voltage rating - How to read electrolytic SMD capacitor labels

I need to replace an SMD capacitor on a board. The printing on it says F1 560 2.5z I have googled intensely but have been unable to find information on how to read such a codes. I need to find out ...
2
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2answers
295 views

Mount SMD component raised 45 degree from board

My challenge is, how can mount a SMD component in a 45 degree angle raised from the PCB. I am doing a temperature sensing device, which is intended to be mounted on a wall, hence the PCB will be ...
4
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4answers
223 views

“Upside-Down” SMD LED

The light would shine down towards the board instead of up and away from it. This would be useful where for example the board is being used as some sort of capacitative touch pad with LED indicators. ...
2
votes
3answers
425 views

Making prototypes with high speed SMD components

Even today we have breadboard and strip board on which one can make "quick and dirty" circuits and also test prototypes. However, we have now moved into an era of predominantly surface mount ...
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1answer
98 views

stm32f4 HSE crystal

I'm trying to set up an HSE for my STM32f4, using this crystal. but there are 2 pins : OSC_IN and OSC_OUT, but my crystal only has one output. So what do I link OSC_IN and OUT to ?
0
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2answers
118 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
435 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 ...
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0answers
25 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?
0
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1answer
80 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
86 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
145 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 ...
1
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1answer
92 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 ...
0
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0answers
38 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
107 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
72 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
106 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
282 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. ...
0
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1answer
110 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 ...
0
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1answer
50 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
49 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
36 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 ...
0
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3answers
119 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
57 views

What's the ID nr of this SMD transistor?

Need to replace this transistor, SOT-23. Any ideas on ID?
0
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1answer
88 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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votes
1answer
110 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
78 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
71 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
166 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 ...
1
vote
2answers
178 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 ...
0
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0answers
137 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 ...
0
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2answers
94 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
votes
1answer
47 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 ...
22
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6answers
2k 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 ...
0
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2answers
118 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 ...
3
votes
2answers
1k 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
225 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 ...
0
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1answer
73 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
718 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 ...
1
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2answers
87 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 ...