Yesterday was #worldmetrologyday and thus, a perfect occasion to do the monthly statistical readout of my four 10V references, based on the popular LM399.

Two of them arrived January 15 and has been powered since. A couple of months later, March 22, I added two more. The idea is, that the standard deviation (noise) of the 10V output should improve with time, lots of time 😂

Well, that is in fact what I see. Three of them are now at 1.15uV, 1.17uV and 1.45uV.
The fourth however, started out really high, 81uV 😳, but has since improved to 29uV in just two months.

I plan to keep doing this, - Let’s see what the rest of the year brings 🙂🙂

Long term plan: a 10V calibration transfer 👍🏼

#testandmeasurement #engineer #electronicsengineering #electronics

Active Filter vs Passive Filter

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#ActiveFilter #PassiveFilter #AutomotiveEmbedded #EmbeddedSystems #SignalConditioning #AnalogDesign #PowerIntegrity #EMIFiltering #ElectronicsDesign #ECUDevelopment #ADASDesign #AutomotiveElectronics #SensorFiltering #AnalogCircuits #OpAmps #AutomotiveInfotainment #EmbeddedLearning #PiEmbSysTech #OpenSourceLearning #TechEducation #SelfLearning #ElectronicsEngineering

CPU vs GPU

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Powering up a blue laser diode to 500mW 🙂
Note how it acts like a poor LED until 150mA, at which point the laser process fires 🔥

The 505B is an accurate, adjustable current source which allows for external modulation input.

It’s designed for low-noise (<1.5uA RMS) and it has a photo diode input, so with a calibrated light sensor, you can achieve constant power regulation.

Last but not least: it’s designed for maximum safety with two interlock circuits, one with a physical key.
Its internal design has a complex redundant output circuit, which ensures that the laser will NEVER illuminate unintended and it will NEVER exceed the chosen power setting.

A fancy current source indeed, a laboratory grade instrument 🙂

This video was shot wearing the appropriate safety glasses, be VERY CAREFUL when experimenting with lasers. Even a short duration reflection at this power level WILL damage your vision 🚨‼️

#electronicsengineering #electronics #physics #stem #laserfun #funwithlasers #ee #testandmeasurement

Switching gears back to Ember for a bit, I'm updating the emulator and debugger with changes since my last round of blog posts on the Project Ember implementation, including adding rudimentary syntax highlighting to the debugger disassembly display!

#cpudesign #retrodev #8bit #16bit #DigitalDesign #ElectronicsEngineering #TechInnovation #hardwaredesign #DIYProjects #retrocomputer #retroconsole

Got my hands on this little gem recently, they’re hard to find in a decent state at a decent price tag. Got lucky though so now I have a dedicated laser diode driver in my lab 🤩
Not super high power, it maxes out at 500mA, but it’s enough for a whole range of experiments and it has a lot of nice safety and control features 🙂
It’s surprisingly complex inside, but nicely built and very clean. Doubt it’s seen many hours usage, the fan is just fine 👍🏼
#electronicsengineering #laser #testandmeasurement

Embedded C Language

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Adding parallel circuit allows for the Lambda Diode to oscillate at a frequency determined by the LC resonance frequency. The result is an absolutely beautiful sine wave 🤩

Note how the oscillation starts, once the supply voltage crosses where the current starts to decrease, ending up at the ‘negative resistance’ portion of its characteristic.

This is likely the easiest and most clean oscillator I ever built 😃 I wonder if you can use a crystal or crystal f it would get damaged from the drive level 🤔
Maybe one of those vintage ones..

@va3db

#signalsaturday #electronics #rfengineer #testandmeasurement #hamr #hamradio #electronicsengineering #siglent

Circuit board bodge of the day: Socketzilla! 🙄

I had some of the pins off by 1, so needed to shift them...

#retrodev #8bit #16bit #100DaysRTL #DigitalDesign #ElectronicsEngineering #TechInnovation #hardwaredesign #RetroDev #DIYProjects #retrocomputer

What is a Bootloader in Microcontroller? Why Do You Need It?

📘 Learn more at: https://piembsystech.com/boot-loader/

#Bootloader #Microcontroller #EmbeddedSystems #EmbeddedSoftware #FirmwareUpdate #IoTDevelopment #IoTSecurity #AutomotiveEmbedded #ECUProgramming #CANProtocol #UDSProtocol #FlashingFirmware #OverTheAirUpdate #OTAUpdate #TechLearning #OpenSourceLearning #PiEmbSysTech #PiestSystems #MicrocontrollerProgramming #EmbeddedC #RealTimeSystems #ElectronicsEngineering #STMicroelectronics

Success! I am now able to boot and POST the Apple I Replica Board using the SmartyKit firmware written by Sergey Panarin.

#retrodev #8bit #16bit #100DaysRTL #DigitalDesign #ElectronicsEngineering #TechInnovation #hardwaredesign #RetroDev #DIYProjects #retrocomputer

Back to work after a long overdue several weeks off sailing! This week we look at the memory map of the Ember design...

The Ember Console — System Architecture Design: Memory Map
https://www.iaritech.com/post/the-ember-console-system-architecture-design-memory-map

#retrodev #8bit #16bit #100DaysRTL #DigitalDesign #ElectronicsEngineering #TechInnovation #hardwaredesign #RetroDev #DIYProjects #retrocomputer

Stumbled across an article describing the ‘ADALINE’ #perceptron emulator, an analogue circuit, made entirely by a resistor and potentiometer network.

Being from the early 60’s, there’s not much information to be found these days on the device, but I managed to build it pretty much the way it was - at least I think so 😎👍🏼

It’s quite fun to train and test with different patterns - units like these are the vintage foundation of modern neural networks, AI and language models.

#LLM #AI #neuralnetworks #electronics #electronicsengineering #testandmeasurement

🚀 Understanding the Microprocessor – The Brain Behind Every Smart System!

more at 👉 https://piembsystech.com/microprocessor/

#Piembsystech #Microprocessor #EmbeddedSystems #OpenSourceLearning
#EngineeringBlog #ControlUnit #MemoryUnit #RegisterArray #ALU
#TechEducation #CareerInTech #IoT #LearningPlatform #TechBlog
#StudentEngineers #WorkingProfessionals #ElectronicsEngineering
#SkillDevelopment #FutureEngineer #DigitalLearning #EngineeringConcepts

New to my network or missed this? We're hiring an Electronics Engineer in Margate, Kent! Join a cutting-edge R&D team,. A fantastic full-time role in #Electronic product development. Analogue and Digital Design. Apply via Senex Recruitment #Electronicsengineering #jobs #kent #Hiring

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📡 From designing circuits to building communication systems—find out what ECE professionals actually work on in the real world.
👉 Click here: https://www.engineersheaven.org/forum/topic/153?title=What-do-electronics-and-communication-engineers-do?
to visit our website and read the full article.

#ElectronicsAndCommunication #ECEJobs #ElectronicsEngineering #EngineeringExplained #FutureEngineer #EngineersHeaven

⚡ Confused between Electrical and Electronics Engineering? Discover how they differ in principles, applications, and career paths.
👉 Click here: https://www.engineersheaven.org/forum/topic/6?title=Whats-the-difference-between-electrical-and-electronics-engineering?
to visit our website and read the full article.

#ElectricalVsElectronics #ElectronicsEngineering #ElectricalEngineering #STEMEducation #EngineeringCareers #EngineersHeaven

🧠🔍 Understanding 8085: A Gateway to Embedded Mastery
At Piemb Systech, we go back to the roots of embedded system design by exploring one of the most iconic microprocessors ever created – the Intel 8085.

Explore now:https://piembsystech.com/8085-microprocessor/

#PiembSystech #Intel8085 #MicroprocessorArchitecture #8085Microprocessor #EmbeddedSystems #OpenSourceLearning #TechBlog #ElectronicsEngineering #Learn8085 #AssemblyProgramming #MicroprocessorTutorials #STEMLearning #TechForAll #DigitalLearning

Switching topics to I/O and game controller support, this week we look briefly at the PIA for Project Ember

The Ember PIA — Initial Design Part 1: Peripheral Interface Adapter
https://skicat.medium.com/21f7f4abb2e8

#cpudesign #retrodev #8bit #16bit #100DaysRTL #DigitalDesign #ElectronicsEngineering #TechInnovation #hardwaredesign #PCBDesign #RetroDev #KiCad #DIYProjects #retrocomputern #Verilog #ALU #8BitALU #VLSI #RTLDesign #FPGA #ASIC #ProcessorDesign

Baby steps in getting my Apple I reproduction PCB up and running. 6502 CPU booting with just RAM and ROM attached. It grabs the reset address from ROM and starts executing code...until it tries to do something with IO, which is not attached yet...

I'm monitoring the bus with an Arduino MEGA attached to my MacBook Pro.

#cpudesign #retrodev #8bit #16bit #100DaysRTL #DigitalDesign #ElectronicsEngineering #TechInnovation #hardwaredesign #PCBDesign #RetroDev #KiCad #DIYProjects #retrocomputer