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Posted by jpluimers on 2025/01/30
Retro computing is wildly popular, and with the rise of low cost single-board computers (SBCs for short), both Apple //e and ][+ emulators plus extension cards have proliferated, based on Raspberry Pi (or even their RP2040 microcontroller based Pico), ESP32 or predecessor ESP8266 microcontrollers and others.
Some links for my archive:
Posted in //e, Apple, Development, Emulators, ESP32, ESP8266, Hardware Development, Power User, Raspberry Pi, Raspberry Pi Pico, Retrocomputing, Software Development | Tagged: 3dprinting, Apple, appleii, retro | Leave a Comment »
Posted by jpluimers on 2023/03/22
Kristian Kohntöpp publishes great DevOps related threads on Twitter. [Wayback/Archive] Thread by @isotopp “I am Kris, and I am 53 now. I learned programming on a Commodore 64 in 1983. My first real programming language (because C64 isn’t one) was 6502 assembler, forwards and backwards. “ is his response, about a year and a half ago, to a request by Julia Evans (@b0rk) that I also saved: [Wayback/Archive] Thread by @b0rk on Thread Reader App – Thread Reader App.
Her request: [Archive] 🔎Julia Evans🔍 on Twitter: “if you’ve been working in computing for > 15 years — are there fundamentals that you learned “on the job” 15 years ago that you think most people aren’t learning on the job today? (I’m thinking about how for example nobody has ever paid me to write C code)” / Twitter followed by [Archive] 🔎Julia Evans🔍 on Twitter: “I’m especially interested in topics that are still relevant today (like C programming) but are just harder to pick up at work now than they used to be” / Twitter.
The start of his thread is [Archive] Kris on Twitter: “@b0rk I am Kris, and I am 53 now. I learned programming on a Commodore 64 in 1983. My first real programming language (because C64 isn’t one) was 6502 assembler, forwards and backwards.” / Twitter.
Kristian’s story is very similar to mine, though I sooner stepped up the structured programming language ladder as at high school, I had access to an Apple //e with a Z80 card (yes, the SoftCard), so could run CP/M with Turbo Pascal 1.0 (later 2.0 and 3.0) which I partly described in The calculators that got me into programming (via: calculators : Algorithms for the masses – julian m bucknall), followed by early access at the close by university to PC’s running on 8086 and up. The computer science lab, now called Snellius, but back then known as CRI for Centraal RekenInstituut – is now had an educational deal with IBM, which means they switched from the PC/XT to the PC/AT with a 80286 processor as soon as the latter came out).
Posted in 6502 Assembly, Assembly Language, Development, ESP32, ESP8266, Software Development, x86 | Leave a Comment »
Posted by jpluimers on 2021/11/18
[Wayback/Archive.is] GitHub – JanDerogee/TeleJukebox: A project based on the concepts of the Wonderfoon and Arduinofoon which simplfies the design of the Wonderfoon keeping the most important music playback feature down to
a simple PCB in a small case where you plug the phone in
…
The completed project works very simple:
- Pick up the phone, you hear the “dial tone” MP3, Dial a number, you hear the MP3 0..9 playing (depending on the dialed number), When the song is over, you hear the “disconnected” MP3, You can dial another number and hear another song or hang up the phone.
- Some phones also have a button on the front. When you press this button, the phone randomly playes one of the songe 0..9 and when that song is over, it automatically plays a new song, randomly. This will allow the person on the phone to continuously listen to the music. This may be of help to those who can’t figure out how it works but love to hear the songs over and over again.
- You can configure the music folder from which the MP3s are played, you can use up to 10 different folders
- You can configure the volume of the device
- Configurations are done through the phone itself (dial 738 OR hold the button while picking up the handpiece), you hear a voice that guides you through a menu and all you need to do is dial in your settings value.
You can power this design through a USB port cable. This way the device can be fed using a simple mobilephone charger OR be connected to the PC. When connected to a PC, the TeleJukebox identifies itself like a USB-stick and you can easily modify the file without removing the card from the system. Meaning that you do no even need to open the case in order to change the collection of MP3 files. Keep in mind that when the device is in USB-stick mode, it cannot playback MP3 files meaning that in this mode it will not act like a TeleJukebox.
Especially when using this in a professional environment. be sure the music that plays is rights free (there are music therapists for treating people with Alzheimer’s and dementia that can help you with that).
A less in depth Dutch article (with 13 minute explaining video below) explaining most of the steps and all the reasoning is this multi-part one:
It works with these and younger phones as long as they can do pulse-dialing:
The small regular and debug boxes under the PTT/KPN phone connector box:
Both boards with electronics soldered:
The non-debug board with components to be soldered:
The small cleanup and modification steps (shorting the microphone) for the T65 phone:
Schematics:
Shopping list:
– 1x Pcb of perf board (€ 1,01)
– 1x Arduino Pro Micro (€ 7,95)
– 1x DFPlayer mp3-speler(€ 0,73)
– 1x TIL111 optocoupler (€ 0,41)
– 2x Weerstand 4K7 Ohm (€ 0,16)
– 7x Weerstand 2K7 Ohm (€ 0,56)
– 1x Weerstand 560 Ohm (€ 0,08)
– 1x Elco 1000 µF 6.3 V (€ 0,23)
– 1x Condensator 330nF (€ 0,13)
– 1x Condensator 100nF (€ 0,05)
– 2x Led (€ 0,06)
– 1x USB, type B, pcb (€ 0,67)
– 1x Tactile switch (€ 0,09)
– 1x Pinheader, male, 6 breed (€ 0,03)
– 4x Jumper kabel, female (€ 1,95)
– 1x Micro sd-kaart (€ 2,50)
– 1x PTT-wandcontactdoos (€ 2,99)
– 1x Behuizing (€ 1,22)
Totaal € 20,82Voor de compacte pcb kun je de switch, een led, een weerstand van 2k7 Ohm en de twee weerstanden van 4k7 Ohm weglaten.
The inside of the non-debug box:
Note that the most recent Wonderfoon products got more versatile allowing more songs, warnings for taking pills, and ring-reminders based on morse code.
. De Wonderfoon-Centrale
–jeroen
Posted in Arduino, Arduino, Development, ESP32, ESP8266, ESP8266X, Hardware, Hardware Development, Hardware Interfacing, Raspberry Pi, Software Development | Leave a Comment »
Posted by jpluimers on 2020/07/16
Thomas Rini (of U-Boot and Yocto fame) mentioned these solutions for remote power control of IoT devices and remote updating SD cards in this slide State of the U-Boot – Thomas Rini, Konsulko Group:
Two power solutions I like myself are:
The combination of these allows for really flexible production and testing environments.
Slides at [WayBack] ELC2017 – State of the U-Boot.pdf
–jeroen
Posted in Arduino, Development, ESP8266, ESP8266X, Hardware Development, Hardware Interfacing, IoT Internet of Things, Network-and-equipment, Odroid, Power User, Raspberry Pi | Leave a Comment »
Posted by jpluimers on 2020/03/04
As you know Tesla has thousands of 18650 batteries. The 18650 battery is a strong existence. So we made this 18650 battery shield for maker.
Features:
- Battery protection(Over charge or Over discharge)
- Micro USB port Input
- Type-A USB Output
- 0.5A current charging
- 1 switch control USB output
- 5~8V Input Voltage
- 3V & 1A Output
- 5V & 2A Output
- LED indicate(Green means full,Red means charging)
- 3V output port x3
- 5V output port x3
Charging can only be done at 0.5A, so using it as a sort of UPS seems not possible, but an interesting device nonetheless.
The other products referenced from the same page are interesting too and will undoubtedly bring me some new ideas for some projects.
Source: [WayBack] 18650 Battery shield V3(RaspberryPi&Arduino) from lspoplove on Tindie
Via:
–jeroen
Posted in 18650, Arduino, Batteries, Development, ESP8266, Hardware Development, Li-Ion, Odroid, Power User, Raspberry Pi | Leave a Comment »
Posted by jpluimers on 2019/07/15
Interesting stuff from a while back that I will be using soon: [WayBack] Sonoff Wireless Switch Family Gets a $3 IP66 Waterproof Enclosure.
Pictures via CNX Software; originally found via [WayBack] $2.90 waterproof case for +ITEAD Studio Sonoff switches… – Jean-Luc Aufranc – Google+
–jeroen
Posted in Development, ESP8266, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User | Leave a Comment »
Posted by jpluimers on 2019/06/19
As a follow-up on Raspberry Pi and relays – follow up on Having one Raspberry Pi reset another Raspberry Pi through relay or transistor some of my research links to bring this to Arduino, ESP8266, ESP8266X and similar devices:
–jeroen
Posted in Arduino, Development, ESP8266, ESP8266X, Hardware Development | Leave a Comment »
Posted by jpluimers on 2018/07/11
An interesting re-use: [WayBack] Transform Your ESP8266 Board into a USB to Serial Board Easily with Arduino Serial Bypass Sketch
Via: [WayBack] If you don’t have a USB to TTL board around, you can use an +ESP8266 board instead (or any other Arduino compatible boards with USB). – Jean-Luc Aufranc – Google+
–jeroen
Posted in Development, ESP8266, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User | Leave a Comment »
Posted by jpluimers on 2017/01/05
Interesting idea [WayBack] Arduino controlled automated blinds with Web UI
Via:
–jeroen
Posted in Arduino, Development, ESP8266, ESP8266X, Hardware Development, LifeHacker, Power User | Leave a Comment »
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The Wiert Corner - irregular stream of stuff 