Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [drill]

36 questions
19
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3 answers

What is the meaning of this datasheet diameter notation?

I am reading this datasheet and I want to drill the correct size hole into the board and I am confused what 5-ø1.2 means. I can't understand what the 5 and - sign mean? Your help would be greatly appreciated.
Mick Kelly
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1 answer

Account for Via Stubs When Calculating Impedance?

I'm working on an eighteen-layer board right now. Almost all of the signal layers have high-speed, single-ended traces that should run up to 15 gbit/s. The vias for these high-speed traces will be backdrilled to be a total length of 23 mil, keeping…
wisner
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5
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4 answers

Altium PCB Layout: The Difference of Through Via, Micro Via, and Burried Via

This is my very first time doing 4 layers PCB layout. What is actually the difference between Micro Via and Buried Via? Say I have Layer 1, Layer 2, Layer 3, Layer 4. What I know I use the Through Via for Layer 1 as start layer and Layer 4 for Stop…
raviani
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4
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3 answers

Hole drill sizes >1mm in Eagle?

I am currently trying to build a package for a through-hole potentiometer in Eagle Cad and I want to incorporate holes in my PCB for the metal tabs on the side of the pot. I determined that these holes should be at least 1.8 mm in diameter. However,…
Andrew Schroeder
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3
votes
4 answers

Drill motor improvement to avoid component wear when shut off

Story Get my hands on two Metabo (made in Germany) cordless DC battery powered hand drills previously thrown away because of..... the batteries, how sad. The overall construction is simple however pretty stiff and clever designed with quality…
Codebeat
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2 answers

How many amps does a 18v cordless drill draw?

I have bought an old 18v black and decker cordless drill but with broken batteries, for that, I want to buy a boost converter to convert 12v (max 20A ) from a computer power supply to 18v and use this drill as corded drill, but I need to know, how…
aymane
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1 answer

Help to ID this SOT-89 component

I need your help to try to repair a battery charger of a Black & Decker drill. The charger is composed of two devices; one is a simple power supply, and the second one is the BMS. Unfortunately my father reversed the polarity on the input of the…
itseeder
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Powering 10.8V DeWalt cordless drill from mains

There was a couple of questions on how to power a cordless drill, but they are all about power supplies. I've got a DeWalt 10.8V cordless drill and its battery connects through 4 pins instead of 2 or 3 that I've seen while googling. One is 12V,…
MrCheatak
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2
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0 answers

Multi-layer board drill pair recommendations to reduce PCB cost

I'm designing a simple 6 layer board with following as core components. http://www.ti.com/lit/ds/symlink/tm4c123gh6pm.pdf http://www.ti.com/lit/ds/symlink/afe4403.pdf I using this stackup Now I'm looking at the drill pairs so that will give…
Dee
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1 answer

What kind of motor to use in a PCB drill?

I'm trying to use this super-cheap PCB drill that I bought recently, but it's too weak for human convenience (takes about 10 seconds to get through standard 1.6mm FR4). The drill uses a small DC motor (40 mm length, runs off12V, RPM unknown, my PSU…
boardbite
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2 answers

How to convert cordless tool to corded tool "properly"?

This question is the closest thing that I found similar to my needs, but it is still quite far from the answer I need. I have 2 cordless power drills, a 12V green Bosch and an 18V DeWalt. Their battery packs (accumulators) pretty much died by being…
virolino
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Why are there small coils prior to the brushes in a drill?

I'm trying to repair a drill where the switch got broken. It's turning into something more difficult than I expected due to several issues. One of them is that the brush wires got peeled due to some unknown friction or wear somewhere in the path.…
Pere
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1
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1 answer

A hole in middle of a capacitive touch screen

I'm thinking about using a capacitive touch screen (the touch layer only, no display) to detect the position of two moving parts. Each part would have its 'stylus' just above the screen to mark the position. Unfortunately, such a use-case would…
Josef Kufner
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4 answers

KiCad how to export oval PCB hole as a drill file?

Using KiCad, is there a way to have a pad with an slot shape (referred to in KiCad as "oval") be exported properly as a drill (.drl) file? The pad in KiCad looks like Fig. 1 below. But after exporting the PCB layout to the gerber and drill files, it…
plu
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What's the purpose of a drill symbol?

I use OrCAD environment for designing PCBs but I've never thought about what is the purpose of a Drill Symbol in padstack creator. The diameter is set in the Drill bookmark and other parameters like antipads or thermal pads in Design Layers. I can…
Marco Svizzeri
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