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 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]
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]
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]
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]
One amplifier and anti-aliasing filter immortalised in paxolin for evermore. Paired with a low cost ESP32-WROOM low-power SoC microcontroller with Bluetooth and Wi-Fi.
#electronics #esp32 #opamp #paxolin
[10/06/2022]
#electronics #esp32 #opamp #paxolin
[10/06/2022]
May 19, 2025 at 7:00 AM
One amplifier and anti-aliasing filter immortalised in paxolin for evermore. Paired with a low cost ESP32-WROOM low-power SoC microcontroller with Bluetooth and Wi-Fi.
#electronics #esp32 #opamp #paxolin
[10/06/2022]
#electronics #esp32 #opamp #paxolin
[10/06/2022]
I am using LTspice a free tool, to generate a Bode plot showing the frequency response of a circuit under development. The circuit contains an amplifier and anti-aliasing filter to condition an audio signal prior to digitization by an ADC.
#electronics #ltspice #opamp #bodeplot
[23/05/2022]
#electronics #ltspice #opamp #bodeplot
[23/05/2022]
May 19, 2025 at 7:00 AM
I am using LTspice a free tool, to generate a Bode plot showing the frequency response of a circuit under development. The circuit contains an amplifier and anti-aliasing filter to condition an audio signal prior to digitization by an ADC.
#electronics #ltspice #opamp #bodeplot
[23/05/2022]
#electronics #ltspice #opamp #bodeplot
[23/05/2022]
I’ve repaired and restored this lovely Gakken MY KIT 150 educational toy, made in Japan between the mid-60s and early-70s. I really-really-really wanted one of these as a kid - I now have one, though a little late.
#gakken #teachingaid #stemeducation #electronickit #learning
[16/05/2022]
#gakken #teachingaid #stemeducation #electronickit #learning
[16/05/2022]
May 19, 2025 at 7:00 AM
I’ve repaired and restored this lovely Gakken MY KIT 150 educational toy, made in Japan between the mid-60s and early-70s. I really-really-really wanted one of these as a kid - I now have one, though a little late.
#gakken #teachingaid #stemeducation #electronickit #learning
[16/05/2022]
#gakken #teachingaid #stemeducation #electronickit #learning
[16/05/2022]
One repaired and restored ANITA 811 made by Sumlock Comptometer Ltd. This calculator cost £75 back in 1972, that’s £1,052.98 in today’s money. Not cheap!
https://www.computinghistory.org.uk/det/31305/Anita-811-Hand-Held-Calculator/
#Comptometer #Calculators #VintageComputing http://www.computinghi
https://www.computinghistory.org.uk/det/31305/Anita-811-Hand-Held-Calculator/
#Comptometer #Calculators #VintageComputing http://www.computinghi
May 19, 2025 at 7:00 AM
One repaired and restored ANITA 811 made by Sumlock Comptometer Ltd. This calculator cost £75 back in 1972, that’s £1,052.98 in today’s money. Not cheap!
https://www.computinghistory.org.uk/det/31305/Anita-811-Hand-Held-Calculator/
#Comptometer #Calculators #VintageComputing http://www.computinghi
https://www.computinghistory.org.uk/det/31305/Anita-811-Hand-Held-Calculator/
#Comptometer #Calculators #VintageComputing http://www.computinghi
I’m all up to date on the OS front, after just receiving this automatic update from Microsoft on 5¼” floppies.
#Microsoft #MSDOS #VintageComputers
[27/03/2022]
#Microsoft #MSDOS #VintageComputers
[27/03/2022]
May 19, 2025 at 7:00 AM
I’m all up to date on the OS front, after just receiving this automatic update from Microsoft on 5¼” floppies.
#Microsoft #MSDOS #VintageComputers
[27/03/2022]
#Microsoft #MSDOS #VintageComputers
[27/03/2022]
Happy #PiDay
https://www.i4cy.com/pi/
Pi or π is defined as being the ratio of a circle’s circumference to its diameter. This ratio when expressed in any numerical base (radix) is an irrational number, this means the sequence of numbers generated does not ever repeat or terminate. http://www.i4cy.co
https://www.i4cy.com/pi/
Pi or π is defined as being the ratio of a circle’s circumference to its diameter. This ratio when expressed in any numerical base (radix) is an irrational number, this means the sequence of numbers generated does not ever repeat or terminate. http://www.i4cy.co
May 19, 2025 at 7:00 AM
Happy #PiDay
https://www.i4cy.com/pi/
Pi or π is defined as being the ratio of a circle’s circumference to its diameter. This ratio when expressed in any numerical base (radix) is an irrational number, this means the sequence of numbers generated does not ever repeat or terminate. http://www.i4cy.co
https://www.i4cy.com/pi/
Pi or π is defined as being the ratio of a circle’s circumference to its diameter. This ratio when expressed in any numerical base (radix) is an irrational number, this means the sequence of numbers generated does not ever repeat or terminate. http://www.i4cy.co