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Questions tagged [surface-mount]

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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3answers
138 views

Need help identifying burnt SMD

Help me identify the burnt out SMD located on M801 position in the attached photographs. It belongs to a Philips Bodygroom BG2024/15 PCB. I intended to replace the two rechargeable batteries, but ...
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2answers
336 views

Usefull 0402 and 0603 solderbridge footprints compatible with machine manufacturing?

I am currently in process of my eagle library cleanup, and came up with the idea to create a footprint similar to the one from nucleo boards. Those pads are meant to be easily bridged by just solder ...
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1answer
77 views

Identifying 6 pin SMD 23ALB7

I need some help identifying these SMD . 23ALB7 with 6 pins. They are found on a laptop TOSHIBA SATELITE L650.
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0answers
46 views

Parallel LTC3127 based software controlled supercapacitor charger

I am trying to charge 3 supercapacitors rated for 2.7VDC-300F connected in parallel, giving a total of 900F@2.7V. The IC I am trying to use is the LTC3127 from Analog Devices(Linear Technologies). I ...
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0answers
58 views

What is this SMD for on a SZBK07?

I purchased a SZBK07 CCCV Step Down Buck Converter and I was hoping to remove the TRIMPOT and replace with a potentiometer how ever there was a Orange SMD thing bridged between the 2 and 1 pin's on ...
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1answer
52 views

PWM to analog voltage conversion for communication between two microcontrollers

I want to use this schematic for sending PWM signals from an STM32F0 Arm microcontroller to an ATtiny85. I want to convert the PWM signal to a proper analog voltage, so that the ATtiny analogRead() ...
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0answers
26 views

Is this circuit ok for MCP9700 temp sensor?

I am trying to use multiple MCP9700 temperature sensors and probe certain power IC heatsinks for sensing the temperature through an attiny85. I have two parts in the overall schematic. For each ...
4
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5answers
6k views

Using a home oven for solder paste

I'm doing a project and I have a PCB which needs surface mount components attaching to it. One component has already been attached, and I have some 138deg solder paste in a syringe. This is possibly ...
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3answers
61 views

Need positioning arms for soldering 0201 [closed]

I'm looking for some kind of micro positioning arm to help me solder wires on tiny SMD devices. Some kind of pantograph mechanism where my hands move much further than the tip controlling the wire. ...
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2answers
52 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, ...
2
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3answers
87 views

Via in pad, reflow soldering problem

Recently I've designed a PCB for the ESP8266EX-chip. With my amount of knowledge, I thought it would be smart to stitch vias into pads. To be specific, not only the ground pad of the chip, but also ...
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4answers
122 views

Component identification (SMD) - Beelink X55 Ultimate

Recently my NUC has decided to release some magic smoke. I found two problematic components in it. F1 fuse, which failed (?) to protect the board and U10 which has manifested a nice eruption point. ...
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46 views

LED Board Driver Calculation [duplicate]

If there is a Board that has 100 LED diodes however using different Diodes that have Different specs (Maximum Reverse Voltage, Max Wattage, Maximum drive current etc.) similar to a Quantum Board LED ...
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3answers
106 views

Heatsink on top of SMD plastic IC or bottom of PCB?

I often do designing power modules and always wonder if there is some kind of rule how to properly cool SMD devices. I always look at final products from other companies and some are placing heatsink ...
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2answers
68 views

Need help identifying and finding similar SMD variable resistor

The component appears to be damaged, but the datasheet for the board in question shows that this is a 47k ohm variable resistor. Looks like a trimmer, but not 100% sure. However, I've been trying to ...
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1answer
34 views

How to physically connect AS3933 to 3D antenna?

I'm trying to breadboard LF frequency receiver circuit using AS3933 receiver chip IC and CAS143-147 3D antenna chip. However I don’t understand how can I connect AS3933 pins to CAS143 on a breadboard. ...
2
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1answer
38 views

Eyelet replacement trace repair?

I'm new to electronics, I was working on a surface mount board and I desoldered one of the eyelets a bit too much and burnt its trace as well. What steps should I take to repairing this? I'm not ...
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5answers
2k views

SMD IC mounted upside-down inside a drill hole for extreme low-profile requirements

I don't know if the title is descriptive enough, but I came across this PCB and could stop to wonder about its brilliant design. It is an aftermarket trigger controller for an airsoft gun that works ...
7
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2answers
697 views

SMD footprint design: Heavy copper, pad width smaller than pin width?

I'm working on a high power board that's using heavier (4oz) copper. I have an IC on this board in a 0.8mm pitch QFP-32 package (no other package options available). The IC's datasheet says the pin ...
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0answers
34 views

EAGLE SMD Overlap

I have created a footprint for an SMA-Connector like this: The footprint looks like this: There are 3 SMD-Pads on the Bottom Layer and 2 SMD-Pads on the Top. The SMDs on the outside overlap with ...
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1answer
228 views

How to identify SMD device marked LEFBV?

I have a SOT23-3 component marked \$\underline{\textrm{L}}\,\underline{\textrm{E}}\,\overline{\textrm{F}}\,\overline{\textrm{B}}\,\textrm{V}\$ as shown in the following images: The following ...
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2answers
126 views

Identifying this SMD capacitor

I would like to ask you for help with identify one capacitor at photo below (can't find it). I got GTX 1080 Ti to my hand with torn out capacitor on VRM. I am looking for the identical one. Can any ...
2
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1answer
89 views

Need help identifying SMD component

This is a board from a Johnny Lightning V-bot, it has these SMD 6 pin components that just have a M03 and a dot on one of the terminals. Does anyone have a datasheet or any idea on how to ask for one ...
2
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1answer
89 views

Does anyone know what this smd chip is?

I have some PCB and on it this chip. I'm trying to figure out what it is. I've searched all over the google, SMD codebooks, datasheet websites and I haven't even found a similar thing
2
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3answers
253 views

MOSFET gate resistance's power rating

I wanted to verify the following or get some helpful pointers. So, I have a gate driver which can supply a maximum current of 0.5 A , and I am driving a MOSFET Vgs of 15 V, based on these two ...
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1answer
509 views

How to find SMD transistors library for Altium Designer?

I am new in PCB design, so excuse me if this is a bad question! I know the basic electronics and how to draw schematics in Altium. But about SMD parts, I am a little confused! How can I find SMD ...
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2answers
113 views

Have SO(P)X components 2.54mm, 1.27mm or smaller pin spacings?

I'm a bit confused about the pin spacings of SO8/SOP8. Example: in Detail 2.54 SOP8, pin spacing is 2.54mm. However, according to Small_Outline_Integrated_Circuit, fragment: Small-outline package ...
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1answer
853 views

How to decode the markings on an SMD choke?

I have a broken Ravensburger Tiptoi pen for kids. I opened it and the choke L7 broke. It is SMD and marked 420. I found out that this could be either 42 micro or nano Henries. Question is, which is it,...
36
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1answer
55k views

How do I identify SMD components? (or how do I identify any component)

How do I identify the markings on an SMT component and match it up with a part number so I can be a good designer and actually look at a datasheet (and read the whole thing)? Or identify a part to ...
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1answer
70 views

Damaged Connector Identification

This connector got damaged while repairing a device, and I've been unable to identify it to replace it. The connector is SMD mounted with the circuit board underneath based on the image above. It is ...
1
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1answer
140 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 ...
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0answers
33 views

SMT marking code 81TI and TI8A

I'm not able to find device based on marking code. I search in google, distributors and manufacturers site without success. Please help to identify it. They are in 2 different, but similar dimmer ...
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2answers
74 views

How to interface with SMD pads to a custom MCU on PCB

I have a board that I want to remove the existing microcontroller and apply my own. I'll be swapping out one brand of microcontroller and putting in something completely different and so I intend to ...
1
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1answer
74 views

I need help to identify a SMD component

I want to identify a SMD component of a Nubia Z9 MAX board (NX512JMB) In the next picture you can see the red square. A 4 PIN SMD component (or 2 PIN component, I don't know). The green square I ...
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4answers
173 views

How to connect multiple 0402 leds to an Arduino for a 1:87 model

I want to replicate lighting a 1:87 scale police car with the aid of an Arduino Pro Micro ATmega32U4 powered by a 90mAh 3.7V LiPo which is connected to a TP4056 5V Lipo battery charger which is ...
1
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2answers
94 views

How do I find a replacement for this SMD Zener diode?

I am attempting to repair a circuit board where this particular Zener Diode is fried. I have attempted to search for any references to Zener diodes that are marked 8•9 (and 6•8) without success. ...
3
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1answer
1k views

SMD Component Identification 6 pin with diode properties

I am having a difficult time trying to identify the following 6 pin SMD component: I have been searching for what it might be, or the company who made it but have had no luck thus far. It seems to ...
1
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1answer
48 views

I need help identifying two passive SMD components from [ GoPro Hero+ ]

[ This is the bottom side of the GoPro PCB. I marked the components I need identifying. I assume they are either capacitors and/or resistors, but I need confirmation.
0
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1answer
98 views

Compatibility between XBEE-PRO 900 HP and XBEE SX

I wanted to use a 900 MHz xbee and I need one side to be surface mount. So I'm thinking of getting an XBEE PRO 900 HP (XBP9B-DMST-002) and an XBEE SX (XB9X-DMUS-001). These devices have the same ...
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1answer
36 views

How mount IR gas detector sensor for outdoor use

I'm in search of a Gas detector sensor for outdoor use and I've found this sensor. My only concern is how do I mount it for outdoor use as, on the datasheet, there's no information about the mounting. ...
0
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2answers
66 views

What are these two smd components?

I fried these two components by plugging in the battery the wrong way. What are they? I read SMDs have an ID which helps identify them but since they are burned i cannot read the ID. If i replace them ...
1
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1answer
80 views

Re-soldering SMD with SMD rework station

I recently purchased a clone 858D SMD rework station and would like to get familiar with de-soldering and re-soldering SMD chips. I was able to de-solder fine, but when trying to re-solder I can't ...
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1answer
77 views

Need Help To Identify Attached SMD Component

I am trying to fix a RS485 circuit. There is 3-pin protection components on both A and B pins. The component is connected serially to the line and mid pin is grounded. There is no label on the ...
0
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1answer
69 views

SMD capacitor damaged - use of X2 class

I have a question about the need of the use of the X2 capacitor. I have a simple design which can be connected to AC line and I not use an X2 class capacitor but I m using an SMD capacitor from Murata ...
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0answers
46 views

Magnavox circuit board question

I have TV that just died. Magnavox 32ME402V/F7. Pretty sure it's a bad capacitor. I'm sure I found one that's bad using my ESR tester. But I have two questions. The one that's bad according to my ...
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2answers
195 views

SMD SOT89 identification

I am trying to Identify this SMD component, Pin 1 GND , 2-VCC, 3-? Out I can identify top letter is C , Bottom is G11, I think it might be a transistor but it odd being connected to the main power ...
0
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1answer
59 views

Aluminum SMD Capacitor replacement question

I want to replace the caps on this mainboard but I'm not sure what to replace them with. I don't know enough about capacitance and am not sure where to turn for help. Here's a picture. I don't know ...
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2answers
102 views

Surface Mount Resistor Clip?

I have a goofy idea: a user is given a PCB and a pack of surface mount metal film resistors. To configure the board's settings, the user places various combinations of resistors into several 'sockets' ...
2
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2answers
145 views

SMD desoldering - struggling to get this chip quik stuff working, what am I doing wrong?

So I have to replace a SMD connector, and although i do have soldering experience, it's all with THT. I watched like 10 different YouTube videos on chip quik, and they all made it look so easy, so i ...
0
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1answer
63 views

Component identification: SMD: 120C, F mark

What is this component? When I search on internet, I get a lot of thermal protection components, but they do not look like this. I got it as a batch from someone, so I don't know the usage. The ...