i4cy 📌
@i4cy.com
Guy Fernando (aka i4cy) is a Computing Scientist, Engineer & self appointed Polymath. Programs in various languages, solders to anything electronic. 📻 MØOOX
I have been commissioned to conduct an in-depth investigation into income inequality across various countries. The findings of this research are now available and can be accessed through the following link.
www.i4cy.com/inequality/
www.i4cy.com/inequality/
Measuring Inequality Across Countries
Tracking inequality around the World and who gets what
www.i4cy.com
November 3, 2025 at 4:37 PM
I have been commissioned to conduct an in-depth investigation into income inequality across various countries. The findings of this research are now available and can be accessed through the following link.
www.i4cy.com/inequality/
www.i4cy.com/inequality/
I am truly honoured and delighted to have been selected as the Third Place Winner in the 2025 CLB design challenge. Being recognized by the judges among such a talented group of participants is both humbling and encouraging.
www.i4cy.com/brm/
www.i4cy.com/brm/
Binary Rate Multiplier using PIC Configurable Logic Block
Binary Rate Multiplier using PIC Configurable Logic Block
www.i4cy.com
November 3, 2025 at 4:22 PM
I am truly honoured and delighted to have been selected as the Third Place Winner in the 2025 CLB design challenge. Being recognized by the judges among such a talented group of participants is both humbling and encouraging.
www.i4cy.com/brm/
www.i4cy.com/brm/
https://i4cy.com/pi/ - Happy Pi Day! #PiDay http://i4cy.com/pi/
https://twitter.com/i4cy_/status/1635690327049744403
[14/03/2024]
https://twitter.com/i4cy_/status/1635690327049744403
[14/03/2024]
May 19, 2025 at 7:01 AM
https://i4cy.com/pi/ - Happy Pi Day! #PiDay http://i4cy.com/pi/
https://twitter.com/i4cy_/status/1635690327049744403
[14/03/2024]
https://twitter.com/i4cy_/status/1635690327049744403
[14/03/2024]
I did try “ringing” the Addmaster 01 Hotline number – but strangely no one answered. So I repaired and restored this vintage 1972 Addmaster calculator myself. It uses an early gas discharge “Panaplex” orange display. #VintageElectronics #VintageCalculator #Panaplex
[05/10/2023]
[05/10/2023]
May 19, 2025 at 7:01 AM
I did try “ringing” the Addmaster 01 Hotline number – but strangely no one answered. So I repaired and restored this vintage 1972 Addmaster calculator myself. It uses an early gas discharge “Panaplex” orange display. #VintageElectronics #VintageCalculator #Panaplex
[05/10/2023]
[05/10/2023]
I'm displaying 3D mesh shapes in this C# app on this repaired/restored #VectorScope from the 1970s. Combining new and old - a match in electronic heaven. #3Dgraphics #programming #electronics
[16/08/2023]
[16/08/2023]
May 19, 2025 at 7:01 AM
I'm displaying 3D mesh shapes in this C# app on this repaired/restored #VectorScope from the 1970s. Combining new and old - a match in electronic heaven. #3Dgraphics #programming #electronics
[16/08/2023]
[16/08/2023]
Transistor checking using the 1970s made, and the more recent homemade. Can you guess which one is newer?
#Tridendifier #TT144 #Electronics #NPN #PNP
[29/06/2023]
#Tridendifier #TT144 #Electronics #NPN #PNP
[29/06/2023]
May 19, 2025 at 7:01 AM
Transistor checking using the 1970s made, and the more recent homemade. Can you guess which one is newer?
#Tridendifier #TT144 #Electronics #NPN #PNP
[29/06/2023]
#Tridendifier #TT144 #Electronics #NPN #PNP
[29/06/2023]
Did I watch the FCukup this weekend? Of course not! Instead, being an uber-geek I built this Z80-MBC2 board and revisited the groovy 70s computing era. Definitely a nostalgic trip down computer memory lane.
#100DaysOfCode #z80mbc2 #RetroComputing #cpm #digitalResearch
[05/06/2023]
#100DaysOfCode #z80mbc2 #RetroComputing #cpm #digitalResearch
[05/06/2023]
May 19, 2025 at 7:01 AM
Did I watch the FCukup this weekend? Of course not! Instead, being an uber-geek I built this Z80-MBC2 board and revisited the groovy 70s computing era. Definitely a nostalgic trip down computer memory lane.
#100DaysOfCode #z80mbc2 #RetroComputing #cpm #digitalResearch
[05/06/2023]
#100DaysOfCode #z80mbc2 #RetroComputing #cpm #digitalResearch
[05/06/2023]
https://www.i4cy.com/sinclair/
C Programming on #Sinclair ZX Machines - Generating a Mandelbrot fractal in C for the #ZX80, #ZX81 and ZX #Spectrum vintage computers with #Z88DK.
#100DaysOfCode #RetroComputing #Programminghttps://www.i4cy.com/sinclair/
[11/05/2023]
C Programming on #Sinclair ZX Machines - Generating a Mandelbrot fractal in C for the #ZX80, #ZX81 and ZX #Spectrum vintage computers with #Z88DK.
#100DaysOfCode #RetroComputing #Programminghttps://www.i4cy.com/sinclair/
[11/05/2023]
May 19, 2025 at 7:00 AM
https://www.i4cy.com/sinclair/
C Programming on #Sinclair ZX Machines - Generating a Mandelbrot fractal in C for the #ZX80, #ZX81 and ZX #Spectrum vintage computers with #Z88DK.
#100DaysOfCode #RetroComputing #Programminghttps://www.i4cy.com/sinclair/
[11/05/2023]
C Programming on #Sinclair ZX Machines - Generating a Mandelbrot fractal in C for the #ZX80, #ZX81 and ZX #Spectrum vintage computers with #Z88DK.
#100DaysOfCode #RetroComputing #Programminghttps://www.i4cy.com/sinclair/
[11/05/2023]
Just repaired and restored this 1973 Sinclair Cambridge Type-2 vintage calculator. It uses a TMS0801NC calculator chip by Texas Instruments which requires -10V and -15V supplies since it is a PMOS device.
#Sinclair #SinclairCambridge #SirCliveSinclair #RetroComputing
[21/03/2023]
#Sinclair #SinclairCambridge #SirCliveSinclair #RetroComputing
[21/03/2023]
May 19, 2025 at 7:00 AM
Just repaired and restored this 1973 Sinclair Cambridge Type-2 vintage calculator. It uses a TMS0801NC calculator chip by Texas Instruments which requires -10V and -15V supplies since it is a PMOS device.
#Sinclair #SinclairCambridge #SirCliveSinclair #RetroComputing
[21/03/2023]
#Sinclair #SinclairCambridge #SirCliveSinclair #RetroComputing
[21/03/2023]
Forget #ChatGPT and Python! Back in 1993 we used C++, 5¼ floppy disks, and a lot of blood, sweat & tears to train a neural network. https://www.i4cy.com/xor_nn/ https://www.i4cy.com/xor_nn/
[16/03/2023]
[16/03/2023]
May 19, 2025 at 7:00 AM
Forget #ChatGPT and Python! Back in 1993 we used C++, 5¼ floppy disks, and a lot of blood, sweat & tears to train a neural network. https://www.i4cy.com/xor_nn/ https://www.i4cy.com/xor_nn/
[16/03/2023]
[16/03/2023]
Today 14th March is National π Day. Learn how to calculate π to a million decimal places from the comfort of your own browser.
#π #PiDay #MeetPi
https://www.i4cy.com/pi/ https://www.i4cy.com/pi/
[14/03/2023]
#π #PiDay #MeetPi
https://www.i4cy.com/pi/ https://www.i4cy.com/pi/
[14/03/2023]
May 19, 2025 at 7:00 AM
Today 14th March is National π Day. Learn how to calculate π to a million decimal places from the comfort of your own browser.
#π #PiDay #MeetPi
https://www.i4cy.com/pi/ https://www.i4cy.com/pi/
[14/03/2023]
#π #PiDay #MeetPi
https://www.i4cy.com/pi/ https://www.i4cy.com/pi/
[14/03/2023]
Comparing the computing performance of the PIC microntroller series. #whetstone #dhrystone #pic10 #pic12 #pic16 #pic18 #pic24 #pic32
https://www.i4cy.com/pic_benchmark/https://www.i4cy.com/pic_benchmark/
[13/03/2023]
https://www.i4cy.com/pic_benchmark/https://www.i4cy.com/pic_benchmark/
[13/03/2023]
May 19, 2025 at 7:00 AM
Comparing the computing performance of the PIC microntroller series. #whetstone #dhrystone #pic10 #pic12 #pic16 #pic18 #pic24 #pic32
https://www.i4cy.com/pic_benchmark/https://www.i4cy.com/pic_benchmark/
[13/03/2023]
https://www.i4cy.com/pic_benchmark/https://www.i4cy.com/pic_benchmark/
[13/03/2023]
Flashed a few more ICs for the Digital ESR Meter.
#Electronics #ESR #TestEquipment #TestGear
https://www.i4cy.com/m0oox/esrmeter/ https://www.i4cy.com/m0oox/esrmeter/
[08/03/2023]
#Electronics #ESR #TestEquipment #TestGear
https://www.i4cy.com/m0oox/esrmeter/ https://www.i4cy.com/m0oox/esrmeter/
[08/03/2023]
May 19, 2025 at 7:00 AM
Flashed a few more ICs for the Digital ESR Meter.
#Electronics #ESR #TestEquipment #TestGear
https://www.i4cy.com/m0oox/esrmeter/ https://www.i4cy.com/m0oox/esrmeter/
[08/03/2023]
#Electronics #ESR #TestEquipment #TestGear
https://www.i4cy.com/m0oox/esrmeter/ https://www.i4cy.com/m0oox/esrmeter/
[08/03/2023]
The Bailey Borwein Plouffe (BBP) algorithm for calculating π was discovered by Simon Plouffe in 1995. Check out https://www.i4cy.com/pi/ to see how well it performs.
#pi #bbp #algorithm #coding #javascript https://www.i4cy.com/pi/
[08/02/2023]
#pi #bbp #algorithm #coding #javascript https://www.i4cy.com/pi/
[08/02/2023]
May 19, 2025 at 7:00 AM
The Bailey Borwein Plouffe (BBP) algorithm for calculating π was discovered by Simon Plouffe in 1995. Check out https://www.i4cy.com/pi/ to see how well it performs.
#pi #bbp #algorithm #coding #javascript https://www.i4cy.com/pi/
[08/02/2023]
#pi #bbp #algorithm #coding #javascript https://www.i4cy.com/pi/
[08/02/2023]
Finally go around to having a go programming this smart TTGO T-Watch using PlatformIO and C++. My code does nothing fancy, just a simple watch designed to prolong battery power and synchronised using an NTP server.
#lilygo #TTGO #TWATCH #PlatformIO #ESP32
[29/01/2023]
#lilygo #TTGO #TWATCH #PlatformIO #ESP32
[29/01/2023]
May 19, 2025 at 7:00 AM
Finally go around to having a go programming this smart TTGO T-Watch using PlatformIO and C++. My code does nothing fancy, just a simple watch designed to prolong battery power and synchronised using an NTP server.
#lilygo #TTGO #TWATCH #PlatformIO #ESP32
[29/01/2023]
#lilygo #TTGO #TWATCH #PlatformIO #ESP32
[29/01/2023]
Running a few simple AWK programs on my PIC32-Unix-Box for performance benchmarking purposes.
https://i4cy.com/unix_pic32/
#unix #awk #briankernighan #pic32mz #microchip http://i4cy.com/unix_pic32/
[18/01/2023]
https://i4cy.com/unix_pic32/
#unix #awk #briankernighan #pic32mz #microchip http://i4cy.com/unix_pic32/
[18/01/2023]
May 19, 2025 at 7:00 AM
Running a few simple AWK programs on my PIC32-Unix-Box for performance benchmarking purposes.
https://i4cy.com/unix_pic32/
#unix #awk #briankernighan #pic32mz #microchip http://i4cy.com/unix_pic32/
[18/01/2023]
https://i4cy.com/unix_pic32/
#unix #awk #briankernighan #pic32mz #microchip http://i4cy.com/unix_pic32/
[18/01/2023]
Every year on February 7th, E-DAY celebrates the mathematical constant e, which is also called Euler’s Number. So I’m getting ready by writing a new techblog.
https://www.i4cy.com/euler/
#EulerDay #Euler #EulersNumber #Mathematics #Maths #DataScience #JavaScripthttps://www.i4cy.com/euler/
[05/01/
https://www.i4cy.com/euler/
#EulerDay #Euler #EulersNumber #Mathematics #Maths #DataScience #JavaScripthttps://www.i4cy.com/euler/
[05/01/
May 19, 2025 at 7:00 AM
Every year on February 7th, E-DAY celebrates the mathematical constant e, which is also called Euler’s Number. So I’m getting ready by writing a new techblog.
https://www.i4cy.com/euler/
#EulerDay #Euler #EulersNumber #Mathematics #Maths #DataScience #JavaScripthttps://www.i4cy.com/euler/
[05/01/
https://www.i4cy.com/euler/
#EulerDay #Euler #EulersNumber #Mathematics #Maths #DataScience #JavaScripthttps://www.i4cy.com/euler/
[05/01/
The media are touting that #WorldPopulation will hit 8 billion on the 15th November 2022. However according to my calculations that milestone already happened last week. #8Billionpeople #8billion #overpopulation
https://www.i4cy.com/global_population/ https://www.i4cy.com/global_population/
[07/11
https://www.i4cy.com/global_population/ https://www.i4cy.com/global_population/
[07/11
May 19, 2025 at 7:00 AM
The media are touting that #WorldPopulation will hit 8 billion on the 15th November 2022. However according to my calculations that milestone already happened last week. #8Billionpeople #8billion #overpopulation
https://www.i4cy.com/global_population/ https://www.i4cy.com/global_population/
[07/11
https://www.i4cy.com/global_population/ https://www.i4cy.com/global_population/
[07/11
Running a neural network classifier model on a microcontroller to solve the XOR problem.
#NeuralNetwork #MachineLearning #ArtificialIntelligence #esp32
https://www.i4cy.com/xor_nn/ https://www.i4cy.com/xor_nn/
[28/09/2022]
#NeuralNetwork #MachineLearning #ArtificialIntelligence #esp32
https://www.i4cy.com/xor_nn/ https://www.i4cy.com/xor_nn/
[28/09/2022]
May 19, 2025 at 7:00 AM
Running a neural network classifier model on a microcontroller to solve the XOR problem.
#NeuralNetwork #MachineLearning #ArtificialIntelligence #esp32
https://www.i4cy.com/xor_nn/ https://www.i4cy.com/xor_nn/
[28/09/2022]
#NeuralNetwork #MachineLearning #ArtificialIntelligence #esp32
https://www.i4cy.com/xor_nn/ https://www.i4cy.com/xor_nn/
[28/09/2022]
My Lottery Simulator, helps you win the next Lotto jackpot. https://www.i4cy.com/lotto/
#Lotto #UKLotto https://www.i4cy.com/lotto
[25/08/2022]
#Lotto #UKLotto https://www.i4cy.com/lotto
[25/08/2022]
May 19, 2025 at 7:00 AM
My Lottery Simulator, helps you win the next Lotto jackpot. https://www.i4cy.com/lotto/
#Lotto #UKLotto https://www.i4cy.com/lotto
[25/08/2022]
#Lotto #UKLotto https://www.i4cy.com/lotto
[25/08/2022]
Outrageous #scorchio record temperatures here in West London, UK at the moment. I’m measuring a temperature 41°C outdoors in the shade, using my trusted calibrated Platinum Resistance Thermometer (PRT).
#heatwaveuk #UKHeatwave #heatwave, #heatwave2022 #ClimateEmergency
[19/07/2022]
#heatwaveuk #UKHeatwave #heatwave, #heatwave2022 #ClimateEmergency
[19/07/2022]
May 19, 2025 at 7:00 AM
Outrageous #scorchio record temperatures here in West London, UK at the moment. I’m measuring a temperature 41°C outdoors in the shade, using my trusted calibrated Platinum Resistance Thermometer (PRT).
#heatwaveuk #UKHeatwave #heatwave, #heatwave2022 #ClimateEmergency
[19/07/2022]
#heatwaveuk #UKHeatwave #heatwave, #heatwave2022 #ClimateEmergency
[19/07/2022]