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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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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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57 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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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 ...
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3answers
112 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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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, ...
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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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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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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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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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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. ...
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1answer
37 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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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
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 ...
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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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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
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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
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 ...
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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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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 ...
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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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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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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. ...
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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 ...
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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.
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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 ...
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1answer
79 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 ...
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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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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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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. ...
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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' ...
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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 ...
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1answer
84 views

Malfunctioning atmega32u4 split keyboard — help diagnose

I purchased this split keyboard kit called a gergo and assembled it myself. The board properly registered via usb so I flashed it with qmk which has very good support for atmega32u4 and several ...
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2answers
2k views

Ways to get SMD resistors from a strip

I'm doing some SMD hand soldering occasionally and am looking for a better way of getting SMD resistors from a strip, so their orientation is upside up and their reading is e.g. from left to right. I ...
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5answers
2k views

Thin wall to block LED light from hitting photodiode?

I'm designing a small heart rate sensor using green smd LEDs and a photodiode. The photodiode needs to measure the reflected light, and not direct light from the LEDs. The LEDs are near the perimeter ...
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7answers
2k views

Hand soldering SMD 1206 components [closed]

Because I tried to wire-solder a protoboard which failed miserable, I'm intending to order a PCB. However, to minimize the area, I want to use some SMD1206 components. I ordered some basic ones (...
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0answers
56 views

Smd Component identification

I was creating schematic from a pcb but could not understand what the component in the image is for. The name written on the component is L386. At first i thought that it is a voltage regulator like ...
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1answer
72 views

What is (was) this component at ZD102 (top left, next to powered serial connector)

Part at ZD102 is overloaded with too much current and blown. It's three legged, with two legs on the south side and 1 on the top. The left side (white in the picture) is blown and has since ...
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3answers
153 views

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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35 views

help identify the SMD AK1629

Failed DVR Suspect that burned down this detail:prozvanivatsya short circuit in both sides can't understand which part to replace?
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1answer
77 views

Trying to attach resistor to MacBook logic board (a1278, 820-3115-b)

On my logic board, I knocked off a loose resistor when I was replacing my battery. The resistor was r6700, which is located right at the edge of the board and its function is to detect headphones. So ...
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1answer
95 views

SMD transistor die vs DIP transistor die [closed]

Is the die of SMD transistors different from die of DIP transistors with a unique part number? Is the power transmission of a transistor dependent on its package type or chip type ?
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0answers
43 views

Figuring out Inductance

I am trying to figure out the Inductance used on this PCB. I know it's value but need to understand what type of inductor it is and other things so I can order it. The code on it ...
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2answers
68 views

SMD Device and manufacturer ID markings S2

I have a SMD device that I am am trying to identify. Can anyone point me to a manufacturer? Probably a resistor but I am not sure. Any help would be appreciated. The scale bar in the picture is not ...
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1answer
60 views

Board soldered airtight capsule

Mechanical Engineer here, not an EE. I have some environmental sensors that need to be a part of a flow path. It occurred to me that it might be possible to have a metal "can" that sealed to the ...
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1answer
70 views

30 Meter in series LED SMD 5050 60 led/m 12v RGBW

I want to run 30 meter Led length in series in a room on the ceiling. LED specifications (according to the supplier:) LED Type: 5050 RGBW LED Light Strip Quantity: 60 LEDs / Meter Working Input ...
0
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1answer
75 views

Surface Mount Adapter PCB With Castellated Holes

I have some prototype boards that I would like to modify. The modification includes removing a section of circuit and replacing it with another circuit. My theory on how to do this is to make an ...