Ralph D.
Tallinn, Estonia
90%
Job Success
Senior Embedded System Developer
$50.00/hr
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
Work history
Work history
Remote Sensor For Industrial Application
Aug 17, 2023
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May 28, 2025
"Ralph is a great person to work with. He is smart, logical, innovative, and open to ideas. A lot of engineers can be difficult to work with, but Ralph is…
Private earnings
parts selection and mechanical design
May 31, 2019
-
May 25, 2025
No feedback given
Private earnings
Validation and PCB design for CNC
Dec 2, 2024
-
May 20, 2025
"I'll start by saying that Ralph will very likely be a great choice for your project. I don't question his dedication to finishing a project. However, I've given low “Adherence…
Freelancer's response
"Great words, but it requires the ability and willingness to learn what the other person want to say. You denied any conversation about why, when, how. You making things up…
Private earnings
PCB Designer & Electrical Engineer - Ongoing Consulting Position - Experience with USB required
Sep 28, 2022
-
Jan 30, 2025
Private earnings
Motor bike dashboard PCB review
Nov 18, 2024
-
Jan 17, 2025
"Extremely capable and competent hardware architect. Went above and beyond in his review of the PCB Schematics - undertook my initial request, but then offered a solution outside of my…
Private earnings
RS232 to wifi
Nov 9, 2021
-
Nov 26, 2024
Private earnings
Electrical circuit design for custom camera array
Jun 16, 2022
-
Mar 21, 2024
"I would highly recommend Ralph to anyone. Not only was he exceptionally skilled, knowledgeable and completed everything well within the project timeline but he went over and above to add…
Private earnings
Embedded System Diagram for Provisional Patent Filing
Aug 16, 2023
-
Nov 5, 2023
No feedback given
Private earnings
Design of firmware specification for Sub-GHz radio connected sensors
Jun 23, 2023
-
Aug 21, 2023
"Joseph delivered good work on this project"
Freelancer's response
"I am not Joseph ! My name is Ralph"
Private earnings
1-2 hour consulting video call - hardware design and production, embedded development
Jan 20, 2022
-
Feb 1, 2022
"I had a consulting session with Ralph regarding a lot of different topics within all facets of hardware production including the software / firmware, procurement, PCB design, testing etc. It…
Private earnings
exploring customizing game consoles options
Nov 1, 2024
-
Present
Job in progress
Private earnings
Waterwatch development
Jul 4, 2024
-
Present
Job in progress
Private earnings
(URGENT) Professional Electronic Engineer
Feb 7, 2024
-
Present
Job in progress
Private earnings
1-2 Hour Consulting/Interview for Embedded RF Strain Gauges
Aug 16, 2023
-
Present
Job in progress
Private earnings
Firmware and Test Software Engineer for Clamshell Test Fixture Project (RF/GPS + 3D Prototyping)
Jul 31, 2023
-
Present
Job in progress
Private earnings
Medical eye model training device
May 15, 2023
-
Present
Job in progress
Private earnings
Transistor-level Circuit Designer
Jun 3, 2022
-
Present
Job in progress
Private earnings
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Skills
Skills
- Product Development
- Autodesk Fusion 360
- Mechanical Engineering
- PCB Design
- DesignSpark
- Bluetooth
- Engineering Design
- Microcontroller Programming
- Internet of Things Solutions Design
- Circuit Design
- Home Automation
- C++
- Mechatronics
- ESP32
- Electronic Design
Project catalog
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