USB key activated by monostable multivibrator - Schematic and PCB layout

$30-250 USD

Imekamilika

Imechapishwa

over 2 years ago

$30-250 USD

Kulipwa wakati wa kufikishwa

For encrypting some online transactions, I am using a PC connected USB key. A transaction never takes more than a minute or so, and for security reasons, this USB key then needs to be removed once transaction completed, or hackers could perform transactions if they have control over my PC, especially when I am not in front of the PC. That continuous having to plug and unplug the USB key is bothering me, and I would like to make a small box in which this USB key is plugged in. It has a button, and when pressed on this button, the USB key (data bus) will be activated for approx. 2 minutes, and then automatically disable the USB data bus again. So the only thing I need to do just before performing the transaction, is single press the button, and forget about it. As I lack the time to build it myself, I am looking for a freelancer who can design the schematic and PCB layout. Both schematic and layout MUST be natively drawn in ALTIUM or CIRCUITSTUDIO, and please advise both application and version you will be using while bidding. Converted files from other packages will not be accepted. Simulation could also be performed with LTSpice. Functional description: A monostable multivibrator, build with MC74VHC1G132 (SOT353) smith trigger NAND gate (as I have those in stock), will be triggered by a single press of a button, this will activate a 2x2 USB SWITCH (a FSUSB30MUX, also already in stock). The state should remain active for a good 2 minutes, the time needed to approve an online transaction. All this will be powered from USB, which will be hard-wired to the device and permanently connected to my PC. Being able to provide a simulation model of the monostable multivibrator section would be a plus. I assume you have sufficient knowledge to connect and select/add the remaining components to make it to a working schematic. I would like to review and approve schematic and simulation model prior to start of layout. This is not an urgent project, but I care about good craftsmanship and attention to (functional) detail. Un-careful component placement or sloppy routing will be returned to sender… MC74VHC1G132 => [login to view URL] FSUSB30MUX => [login to view URL]

Electronics

Electrical Engineering

PCB Design and Layout

Schematics

Kitambulisho cha mradi: 32220325

Kuhusu mradi

17 mapendekezo

Mradi wa mbali

Inatumika 2 yrs ago

Unatafuta kupata pesa?

Barua pepe

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Imetolewa kwa:

@nuamansaghir

Greetings, I am honoured to get this opportunity of being able to assist you. I have gone through your project brief and attached files as well which made everything clear regarding your project. I am an electronics engineer having over three years of experience as a professional PCB design engineer. I have developed many PCBs utilising Altium Designer and many other software for different industries including Education and many more. You can checkout my diversified portfolio at https://www.freelancer.com/u/nuamansaghir I will design your project utilising Altium Designer 18. I will provide source files, Gerber Data and BOM as well. I can complete this task within agreed time frame and will always there for your support even after completion of this task. I am looking forward to hearing from you soon Thanks in advance, Nuaman Saghir

$50 USD ndani ya siku 2

4.9

(12 hakiki)

4.2

17 wafanyakazi huru wana zabuni kwa wastani $279 USD kwa kazi hii

@sagradoamicus

Hi, I have almost 15 years of experience. I have read the details and have a few questions. Please get back to me to discuss it further. Thanks

$200 USD ndani ya siku 4

4.8

(249 hakiki)

7.9

@avigupta0061

Best USB Design Expert at your doorstep! Dear Client, We can design schematic and layout PCB with "small USB Key box" using button in Altium for activated by monostable multivibrator. We have seen the attached document you shared. We couldn’t stop ourselves from bidding after going through the description as they are an exact match with our skill set and experience. We have extensive experience in USB key-based PCB design and know all the intricacies required to get the job done with perfection. Please message us as there are certain queries and suggestions for robust and reliable "USB Key Box" development. With more than 15 Years of experience in PCB Design and Circuit Design in Altium, We can ensure you best quality work and before time delivery. Following is a brief list of expertise that we are carrying: 1. IOT products 2. Microcontrollers based circuit design – STM32, STM8S etc 3. Smart Products like Smart watch - GSM/GPRS/GPS etc 4. Wireless Products - BLE/WiFi- ESP32/ESP8266/NRF24L01 5. Monostable Multivibrator 6. MC74VHC1G132, (SOT353) Please answer the following questions: 1 What are your future plans with this project? 2. Are there any specific market standards like CISPER you are aiming? 3. What will be ambient temperature of this product? Let’s have a quick discussion for 5 mins where we would formulate a plan of action of how we shall take this project to the horizons of success. Regards Avi Tech Experts Quality is never an Accident

$180 USD ndani ya siku 2

5.0

(43 hakiki)

7.2

@mocuZ

Dear Valued Employer, My name is Martin and I am an engineering physicist with extensive experience in the field of circuit design, circuit prototyping and PCB design. As I understand from the project description you are looking for an electronics engineer capable of designing a custom PCB according to all stated requirements. So, without further ado here's how the workflow would look like, if you happen to choose me as a partner for your project: 1. Initial discussion 2. Schematic drafts 3. Component library creation 3.1 Schematic symbol library creation 3.2 Footprint library creation 4. Schematic drawings 5. Review of schematic drawings 6. Layout design 6.1 Components placement and arrangement 6.2 Stack-up configuration 6.3 Components routing 6.4 Review of final layout design 7. Final check, verification and validation 8. Production files (GERBER, NC DRILL, ASM, PICK & PLACE, STEP, BOM, SCH, 3D PDF). Delivery term could be further negotiated once I start working on the project. Don't hesitate to contact me with questions regarding any details around your project. You could also check out my profile on Freelancer for more details around my professional experience. I am looking forward to hearing from you soon. Thank you for you time. Kind Regards Martin K. P. S. Very detailed project description. I appreciate it. I rarely see such a well defined project.

$200 USD ndani ya siku 42

5.0

(15 hakiki)

5.6

@etalhak

Hello, I am an electronics and telecommunication engineer and my major is wireless systems' design. I am experienced in hardware and embedded systems' design. I have designed/printed/tested many PCBs and I am quite experienced with RF design such as designing antennas, matching networks(distributed/lumped elements), filters(distributed/lumped elements), power amplifiers, dividers, feed networks, differential pairs/signals, EMI, clearance areas, shielding for EMI, conducted interference, common mode, etc, LVD, high speed data communication. I have checked your requirements I am quite sure that I can help you with your project. Just give me all the details and I will do my best to help you. Best regards

$200 USD ndani ya siku 7

4.9

(36 hakiki)

5.3

@jitendrabaraiya

I have more than 9 years experience in embedded hardware design with eagle and altium design software with lt spice simulation also . So I can do your job within a time limit with your satisfaction.

$1,390 USD ndani ya siku 15

4.8

(7 hakiki)

4.9

@preetpalsingh33

hello sir, how are you. I read your proposal and i am interested in this project. I am an Embedded engineer (ARM, PIC, AVR, Arduino, SOC BLE (bluetooth) chips, ZigBee, WiFi, GPS, LED, LCD display etc.) and PCB designer (Altium, KiCad, Orcad), Android IOS developer, 3D Modeling. You can check my profile for more information. I can do this project as per your requirement. I hope you will consider me for this project. I am waiting for your reply...... thanks with regards Preetpal Singh

$150 USD ndani ya siku 7

4.7

(18 hakiki)

4.9

@HarimohanG

Hi I can design schematic and layout PCB with "small USB Key box" using button in Altium for activated by monostable multivibrator in a quality and timely manner. I have humungous experience in USB Key Based PCB design, Altium and would make the solution cost-effective, robust, and efficient. If you are looking for a reliable design partner please message me now. I provide services of PCB Design, Circuit Design, Circuit Review, PCB review, Circuit simulation, IOT products development, and Sensor conditioning product development. My expertise of mine is in the following fields: 1. Wireless Products – BLE, Wi-Fi, NFC, Lora, etc 2. Power Electronics- Buck, Boost, Flyback, Half Bridge, etc 3. IoT sensors interfacing – Pressure, Temperature, Moisture, PH, etc. 4. Microcontrollers- ESP32, STM32, STM8S, RL78 etc. 5. GSM, GPS, GPRS, 6. Button, Altium 7. USB Key After reading your project details, I have certain queries and suggestions: 1. What is the application of this product? 2. What will be the ambient temperature of this product? 3. What are the mechanical constraints to be taken care of? 4. What are the standards that the product would be complying to? Please try to answer these questions based on which I would be providing free of cost consultation. Waiting for your message, Regards Hari Mohan Engineering for one is magic for others

$140 USD ndani ya siku 2

5.0

(2 hakiki)

4.7

@Safeer143

Hello. I have read your project description and i like the project USB key activated by monostable multivibrator - Schematic and PCB layout i'm an expert in arduino and expert in PCB layout in altium software up to 4 layers therefore i can do this project for you perfectly. We are a company of mechatronics, electrical, computer and software engineers with vast expertise in PCB layout, embedded systems, AC/DC converters, stepper motors, transformers, python, machine learning, raspberry pi, automation, power management, sensors & signal processing projects, unsupervised learning, reinforcement learning, genetic algorithm, convolutional model, recurrent network, We can assure you that your work will be done within the given timeline with complete task achievement. Feel free to contact for further queries so I may guide you well.

$250 USD ndani ya siku 7

4.7

(11 hakiki)

4.5

@KolaPeters

Hi there, i have thoroughly gone through your project description, i am very much interested in working on your project because i'm an experts in this. I'm a senior engineer with rich experience in Electronics, Electrical Engineering, PCB Design and Layout, Schematics. I am a Python developer with 5+ years of experience Skills: PyQt, PySide/PyQt,Scrapy, BeautifulSoup Java, C++, C#, SQL, 4, Pillow, Matplotlib, Xml, PHP, Django json, and csv modules. Expert in statistical analysis of datasets/images and apply ML/DL algorithm with python (Tensorflow, Keras,Pytorch) and R. I am interested in taking this task up for you and I hope I could awake your interest in me. Please kindly send me a message in chat window for more about the project and to adjust price, note price quoted in bid is not the final price, it can be less or more after discussing the project. I am always online, work hard and very sensitive to details. I hope to read from you in chat box. Best regards

$200 USD ndani ya siku 5

4.7

(7 hakiki)

4.3

@lydialin2000

1 ) I have over 20 years of experience in PCB Layout, HW, RF, EMI, FW designs. we can complete various design and layout requirements and Android / iOS app development. # 8051 MCU / ARM Embedded system / Arduino / STM32 / IM6x / AVR / TI MSP430x / PIC / EP32 # WIFI / BT / BLE / GPS / LCD / DTV / MD / Web Camera / LED / Lighting / RPIx / CM4 / CM3 / UP CORE PLUS # LCD Inverter / Touch sensor / NIC / LAN / KSZ9031RNX / LAN8720 / IOT / nRFF528x / ESP8266 / TI CC26x # Battery / Solar Charger / BMS ( Battery Management System ) / Audio / CSR / Codec / AMP / IO-Link / LTE EC25 / BG95 2 ) I can use as below to design and layout # Altium # Protel99SE # Eagle # PADS # KiCad # OrCad # Allegro # Proteus # DipTrace 3 ) I can communicate well in English, please contact us by e-mail or s-k-y-p-e me (saludpcb) to find out relevant details. 4 ) I also have to provide PCB layout design service (super low price) # For PCB layout: 2 ~ 4 Layers -> $0.4 ~ 0.6 USD per pad @ 6 ~ up Layers -> $0.8 ~ 0.8up USD per pad. # For reprinting of schematic and component, quotation will vary by each case. # A minimal of $100 USD 2L / $200 USD 4L / $300 USD 6L will be charged for each case. # 1 ~ 8up layers ( PCB / FPCB ) High Speed / High Density PCB layout # Differential Signal PCB layout # RF Signal PCB layout # 3D Models # FreeCad 5 ) PCB / PCBA (EMS) # Prototype # Components procurement # Assembly # High quality # Quick, 24hr lead time # Low cost

$250 USD ndani ya siku 7