Ralph D.

Ralph D.

TallinnEstonia
96% Job Success

Senior Embedded System Developer

Lifetime self-employed individual with over 30+ years of experience in designing and programming of electromechanic microelectronic systems for industrial and consumer applications and products. Projects included: DSP, Wireless, Bluetooth, Bluetooth Smart, WiFi and consumer playthings, Consumer products, Industrial control, QA data acquisition and visualization, Process control, HMI, CIM/CAM, CNC programming, mechatronic engineering and design. Currently personally located in Spain. My services include: Firmware development, PCB design and assembly, mechanical design, design reviews for production fitness. For prototyping I have in stock 2000+ parts to be prepared for supply chain issues and fast prototyping as well for respond to BOM changes during development. Tools are DesignsparkPCB and Fusion360, full electronic lab including network analyzer. 3D printers and full equipped mechanic workshop for prototyping mechatronic devices or custom enclosures I have been working In the fields of industries: Asphalt, Fertilizer, Concrete, Cement, Injection molding machinery, CNC machinery, combustion Engines, Hydraulic and Pneumatic Systems In the field of consumer products: WiFi, AWS, Audio headset, DMX modules, smart lock, RF enabled tools, smart watch, SubGHz coms and more Programming languages are Assembler, C, C++ Experience with the following brands: Microchip(Atmel) TI Texas Instruments (CC2450, CC1310) NXP Ublox ESP32 RaspberryPI Multi language German, English and Spanish
Rating is 5 out of 5.
5.00 Apr 5, 2019 - Dec 17, 2021

"Ralph helped with various projects and he's been a pleasure to work with. He also has been a resource of knowledge that I have been able to tap on."

Private earnings
Rating is 5 out of 5.
5.00 Nov 10, 2021 - Nov 22, 2021

"Unable to gauge freelancer's work as we have not had any deliverable. Due to slow progress we had to cancel project as project deadline was missed."

Private earnings
Rating is 4.7 out of 5.
4.70 Sep 22, 2020 - Sep 23, 2020
Private earnings
Rating is 5 out of 5.
5.00 Mar 25, 2019 - Apr 6, 2019

"Well done - consultant had all required skills and deep knowledge on the topic"

Private earnings
Rating is 5 out of 5.
5.00 Jul 13, 2018 - Mar 25, 2019

"Working with Ralph was unbelievably great. He took an old project from an engineer that left abruptly to breathe new life into the project. Not only figuring out what was poorly documented but also suggestion and implementing cost-reducing changes that improved our devices overall functionality. We have not yet come to a final version of the device so I can't speak to manufacturability, but this is due to our internal processes and has nothing to do with Ralph's work. I highly recommend Ralph for PCB design, circuit design and firmware development. He is up to date on the ecosystem and documents his work very thoroughly. He is also a great communicator and easy to work with. We will certainly be working with Ralph in the future."

Private earnings
Aug 16, 2017 - Apr 6, 2018

No feedback given

Private earnings
Rating is 5 out of 5.
5.00 Jun 6, 2017 - Jun 8, 2017

"Ralph is a kindly freelancer to help me solve my project, 5 stars recommend to you!"

Private earnings
Rating is 5 out of 5.
5.00 May 21, 2017 - Jun 6, 2017

"This was my first experience working with a remote freelancer, and Ralph made the process very pleasant. His work & knowledge far exceeded my expectations, and as a result we were able to complete my project ahead of schedule. He was seemingly always available, and provided daily updates. We spoke often via Skype, and his English is very good. I am now confident that many more of my projects would benefit from Upwork, and I intend to hire Ralph again immediately to expand on the work that he has already done."

Private earnings
Rating is 5 out of 5.
5.00 Jun 23, 2014 - Apr 29, 2015

"Good combination of soft- and hardware engineering."

Private earnings
Rating is 4.7 out of 5.
4.70 Oct 4, 2014 - Apr 21, 2015

"While we didn't end up needing Ralph, he was very helpful during the beginning of our project and provided lots of valuable feedback about our design direction and project specifications. Clearly he is a seasoned embedded developer and somebody we would certainly consider hiring again should the need arise."

Private earnings

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Skills

  • Circuit Design
  • PCB Design
  • Microcontroller Programming
  • Mechatronics
  • Mechanical Engineering
  • Internet of Things Solutions Design
  • Home Automation
  • Autodesk Fusion 360
  • DesignSpark
  • ESP32
  • Bluetooth
  • C++
  • Engineering Design
  • Product Development
  • Electronic Design

Get started working with Ralph quickly with these predefined projects.

Get started working with Ralph quickly with these predefined projects.

You will get ESP32-WROVER based PCB design: battery-powered, USB, SD-Card, digital I/O

From $320
3 days delivery