Questions tagged [custom]

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26 views

What would be involved to create a bluetooth interceptor and switch for Apple keyboards and mice? [on hold]

Setting the stage– I have a Magic Trackpad and Keyboard 2 which I use with both my work laptop and my personal laptop. Switching between them is just complicated enough that I want to make it better. ...
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0answers
23 views

Custom Pad with plated in Altium

I need to create a footprint for this USB connector(https://cdn.amphenol-icc.com/media/wysiwyg/files/drawing/12401831.pdf). I have dificulties to create a custom through hole pads with plate for the ...
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0answers
50 views

Liberate - Custom Cell Characterization

Tools and Tech: ST 65nm | LIBERATE Library Characterization Platform (x86_64) 12.1.4 (altos 121) | Cadence Virtuoso 6.1.5-64b | Calibre Interactive - PEX v2012.4_16.11 I am trying to characterize a ...
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2answers
129 views

Need a solution: Why does the battery voltage drop for custom PCB?

I have a custom PCB to control a solenoid or DC motor. Input voltage 6-7 volts with 4 batteries in series. I have a few questions: Why does the voltage drop by 1V to 1.5V when the switch is pressed ...
4
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0answers
165 views

Please help with my custom ATMega328 PCB [closed]

I created a PCB for my newest Arduino project and its driving me mad by now. I am through several PCB variations and tried connecting to it (via FTDI first - then) via ISP but I fail every time and in ...
1
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1answer
99 views

USB 3.1 Type-A Legacy Connector to USB 3.1 Type-C

I am unsure of how to design for the following arrangement, any input would be greatly appreciated: Computer [USB Type-A Connector] -> USB Type-A to USB Type-C Cable -> Custom PCB [USB Type-C ...
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0answers
387 views

Custom Arduino powered board (CH340C) Serial Problem

I made this custom board that contains a complete arduino nano on it. I soldered every component with extreme care and already check all the connections and they all go according to the designed ...
1
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1answer
128 views

How do i determine max voltage for a custom BLDC [closed]

I would like to know the process that you would go through to determine the voltage rating on a BLDC. I imagine that it has something to do with how the coils are wrapped and the how many coils there ...
1
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1answer
209 views

STM32F103C8T6 custom design check

Following the failure of my first board design, I designed the following STM32F103C8T6 board. I only routed the fundamental parts of the board(MCU,caps, crystal, regulator etc.) This is a 2-layer ...
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0answers
240 views

Altium keypad footprints custom pad DRC errors

I've created a rubber keypad switch footprints which is a simple contact pad design. First I used arcs and tracks to get a outline and then converted them to top copper region(two seperate regions). ...
0
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1answer
514 views

Generating customized signal in Ltspice

I have a clock with a time period of 1ms. I want to generate a signal which has the following characteristics: Some \$\hat a = 3.7, \delta = 0.1\$ . At a particular clock cycle, the signal must have ...
4
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2answers
178 views

Why batteries need to be custom and smart nowadays?

Recently I refresh a laptop battery with new 18650's. This is working however it still doesn't last very long because of the chip inside this battery. The chip must recallibrated (data is incorrect ...
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1answer
339 views

Why is so expensive to fabricate custom IC [duplicate]

I had read that the fabricate a custom IC is very expensive (>10000$) but why? For example an 555 timer cost <1$. If I design and 555 timer with an inverter at the output in some program (don't ...
5
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1answer
220 views

Do I need some kind of licence or any papers if I want to sell a pcb board that I made to different people?

I have made a watch with a microcontroller and a display which shows a real time clock. I want to sell it to my friends officially. Before I do that, do I have to obtain specific certificates for my ...
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3answers
343 views

Laser driver current and temperature management

For a project I need to make a custom laser driver for a dot green laser module. Below and here 1 you can find my design, the laser I've using now is a PLT5 510 OSRAM, the VSYS is 3,7 V DC from a Li-...
8
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1answer
2k views

Cannot Program a Custom STM32 Board

I've designed a simple STM32 board. Below are the schematic and pcb layout pictures: Schematic: PCB layout: PCB layout with VDD hightlighted: PCB layout with GND highlighted: Only the parts of ...
0
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1answer
57 views

Which standard use for custom communication DC

I want to transmit data and power over 10 meters at 12 volts with 1 amp. I don't know if I could do it using UTP, because that's a standard for other things. Which standard should I choose? Number of ...
7
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1answer
531 views

Stompbox not working

Today I've soldered my clone of ZVEX Wooly Mammoth and when I started testing, it didn't give a sound. Hours of visual and multimeter inspections gave me no clue about a mistake. So, I appreciate any ...
2
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1answer
458 views

Altium ring shaped pad

i'm trying to create an airtight soldered mount for a pipe on a pcb depth sensor board I'm designing. To do this I am trying to create a custom pad in Altium that is a ring and is also plated. I've ...
1
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1answer
70 views

Charger for my own created battery pack

I am building an RC airplane, for which I have also created a battery pack. What kind of charger do I need to power up the simple line-up of: 6 x AAA, 1.2v, 800mah per battery. (Everything is lined up ...
-2
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1answer
68 views

Downloading custom audio in musical toys DIY [closed]

I am a computer science student and recently interest built into electronics . I want to ask how can i download custom audio in musical toys like this . All i have is this kind of phone toy, Please ...
4
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1answer
591 views

Possible causes of dead cyclone IV on custom board

i designed and soldered my first fpga board using cyclone IV in the 144 eqfp package. First of all, i made following mistakes: I am using 3.3V VCCIO for all IO banks. I misread the handbook and ...
1
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1answer
6k 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 ...
0
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2answers
318 views

Custom Eagle Part has isolation built-in?

I've just created the footprint for a QFN-56 8mmX8mm to be used with the TLC5958. It seems like there is some sort of isolation built in to the center pad and I cannot figure it out. In the image ...
-3
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1answer
101 views

Where would I source components to build this IC and credit card sized Bluetooth device? [closed]

I'm interested in building a modified version of this device, however add custom IC work to it. I'm not an electrical engineer, however I know what features I want in this form factor. Specifically I'...
1
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1answer
330 views

Looking for a Micro-USB socket with the same external geometry as Mini-USB [closed]

I'm looking for a Micro-USB socket which has the same external size as a Mini-USB socket. This is to allow us to update some old products to use Micro-USB without us having to modify all the tools ...
1
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2answers
1k views

3.5mm type custom USB connector

For a project, I like to use 3.5mm type USB connector. This is for a closed system therefore I am not worried about USB approval but I am worried for signal integrity and insertion/removal problems. ...