CodeWalrus

Unirse Started by u/DarkestEx • December 17, 2016, 01:13:19 PM

Pi84 - The Raspberry Pi powered TI-84+

Hello together!This is my second go on a Raspberry Pi hearted TI-84+. (Note to mods: I really want to make this a new project without any affiliation to the old so I need a new topic).I have decided for an early hardware version of the 84+ as it's PCB can be cut smaller than on the new versions. For the keyboard and power management, I am going to use a Teensy 3.2 that will hook up to the 84+'es matrix. [...

23 Replies

47,438 Views

Unirse Started by u/Yuki • July 18, 2020, 12:33:40 AM

Commander X16

If you follow the 8-Bit Guy, you might know he's working on a brand new Commodore 64-like computer, and it looks quite interesting: the hardware is close to done, there's an emulator and many tools developed around it, and they even have permission from whoever ended up with the Commodore IP to build on the 64's ROM! So yeah, I'm a mod on the brand-new forums and we're starting to get a nice community going on, if you want to check it out

3 Replies

24,602 Views

Unirse Started by u/c4ooo • December 22, 2017, 11:18:00 PM

z80 computer with arduino coprocessor.

I built a prototype for a z80 computer that uses an arduino for communication and bootstrapping. I can assemble a z80 source program with brass, and send it to the arduino with a small python program. The arduino is running a firmware program that waits for a program to be sent over serial, which it loads into the ram chip for the z80 to execute. The z80 communicates with the arduino via IO requests. The arduino<-->z80 API only contains 3 commands, but these can be used for the z80 to send messa...

5 Replies

14,296 Views

Unirse Started by u/Lionel Debroux • April 04, 2019, 09:59:13 PM

Symbolibre: open RPi Zero-based graphing calculator...

Over the past few days, the word has started spreading about a ~university project of a team of 25 French students working part-time for several months, which yielded the Symbolibre graphing calculator effort, based on modern, cheap hardware components and open source / libre software I'm not involved in that project, I'm just relaying news. To date, most information about the Symbolibre remains written in French, AFAICT.It's based on a $5 RPi Zero module[/b...

3 Replies

14,824 Views

Unirse Started by u/Ephraim Becker • December 24, 2015, 02:14:04 PM

How to make a wire from scratch

I'm planning to make a wire from scratch and all the materials for it from scratch. How do I do this? I don't want to pay for things anymore.

12 Replies

26,306 Views

Unirse Started by u/rowan_futurerave • January 23, 2019, 07:05:56 PM

Resistor with 2 lines only

hey circuit guys and gals.i am trying to fix a old (v1) master system and it has a resistor busted away from the pcb, however the resistor only has two stripes - black and red. i read how a single line resistor means it is just wire (used so robots can solder it in) but cant find anything about ones with two lines. is it the same ie. just a piece of wire???ok thanks ^edit^ sorted

0 Replies

7,662 Views

Unirse Started by u/CVSoft • November 01, 2015, 10:38:42 AM

Pasco Xplorer GLX Hardware

I took some highly detailed PCB pictures of the Pasco PS-2002 Xplorer GLX . Pasco hasn't really published anything about its hardware so I do not have much to go off of (unlike Vernier, Pasco doesn't talk much about their hardware). I've worked out the following info: The CPU is clocked at 50 MHz. I don't even know which IC the CPU is, and I don't know what type of CPU it has; Pasco calls it a "floating point CPU." I hope it isn't in the FPGA. There'...

16 Replies

31,622 Views

Unirse Started by u/Yuki • May 15, 2017, 06:52:59 PM

Building an arcade cabinet

This is a little project I'm building with my brother, some sort of arcade thing which should be pretty fun to do. On the hardware side, I'm using one of my VGA 1440x900 LCD panels, this one has DVI-I with a simple $5 HDMI converter attached, I have a bunch of arcade sticks, my brother already built this one on the bottom, from spare wood and a kit bought on Amazon, there a Raspberry Pi 3 I'm going to install RetroPie, I have an...

41 Replies

36,164 Views

Unirse Started by u/Sorunome • October 25, 2017, 06:13:12 PM

Gamebuino Meta

Sooooo, i've been working the past year on a project in secret, together with others, and it is finally time to come public!We have been working on the Gamebuino Meta, the new Gamebuino console! I've been mainly doing the software part ^.^It was a lot of fun so far Help me, i don't know how to write topics Announcement link: link:

10 Replies

13,017 Views

Unirse Started by u/garvalf • July 03, 2016, 12:50:24 PM

SID + midi on Arduino and YM2149 emulator on atmega8

As said in this thread , I'm working a SID sound chip simulator on Arduino. I'm not responsible for most of the code, but I've assembled some parts, a SID emulator, a midi library, and some settings for modifing the chip.Here is a better sample: last part has some kind of hard bass sound (sawtooth).and the code (w.i.p.): ...

24 Replies

36,349 Views

Unirse Started by u/Yuki • July 20, 2017, 07:51:32 PM

[UCC1] 16x8 Clock

Just some clock I made with my Arduino and a 16x8 character screen. It's linked to a script on my computer that feeds it time and current temperature over serial port, might add some more weather details soon. Anyway, it's a pretty nice thing to make, very useful if you're too lazy to check The Weather Channel all the time.I'm not sure if I'm going to update it anytime soon, or if I have the means to make a video about it, but eh, I have a blurry webcam picture.

0 Replies

6,867 Views

Unirse Started by u/p2 • August 22, 2016, 10:01:33 PM

The WalrusLink Project

Currentle we (DarkestEx + p2) are working at a little hardware project together.Out original idea was that it would be really cool to be able to use external Keyboards on your calculator.However that idea developed into something bigger... Our plan is the following:We want to use Arduino parts to create a rather cheap posibillity to use one (or multiple) external keyboards (PS/2, USB, 2.5mm Phone connector) without any need of knowledge about the technology we use. We want it to be as simple to ...

45 Replies

41,244 Views

Unirse Started by u/DarkestEx • February 03, 2017, 10:16:54 PM

RPN-Calculator

Hello everyone!For many weeks I have been working on a custom and completely hand-built calculator.So let's start with some eye-candy first ht...

19 Replies

28,212 Views

Unirse Started by u/p2 • March 08, 2017, 09:41:51 PM

General HOW TO FIX MY STUFF thread

Okeyyy, I recently bought the following:1 gamecube in a good shape with 1 original controller for 50€1 gamecube in a rather bad shape but with 3 controllers for 70€(it did make sense as 1 controller usually costs 30-40€ and I wanted to have 4)So now I ended up with 2 gamecubes (whic hare apparently both in a good shape, no idea what the warning text was about), 2 sets of cables and 4 controllers. yay...My problem is: for one of the controllers the DOWN is permanently pressed (at least it acts as...

6 Replies

9,230 Views

Unirse Started by u/Caleb Hansberry • July 21, 2016, 07:26:59 AM

PC Case Windows Mod

Modified my PC with a windows for light and a fan. While I was at it I put a USB port in the front which is handy. Here's some pics. Cut all the holes with a Dremel. Also smoothed them out with the Dremel. And yeah I kind of cut into my old Radeon st...

16 Replies

18,441 Views

Unirse Started by u/DarkestEx • October 02, 2016, 10:15:18 PM

Your dream calculator (maybe real sooner than you thought)

Hello together.I have been working on a prototype for a custom calculator. It only has a small, monochrome screen and a convoluted off-the-shelf keypad, but apart from that the hardware is the same as what I might use in a future project. It would be an ST ARMv7M @ 120 MHz with 1024 KB operating system Flash and SD card for program storage. It has 128 KB of RAM and also a coprocessor for WiFi. There is an app available to program it on the go with either your phone, your web browser or with the ...

36 Replies

37,192 Views

Unirse Started by u/DarkestEx • December 14, 2015, 12:39:18 AM

Keyberry Pi - A small, keyboard sized computer

Hello, I am working on a project, where I am building a Raspberry Pi Zero into a USB keyboard which has a USB hub builtin.This gives me more space and also allows me to plug multiple devices except the keyboard into the Pi.The Pi Zero will sit inside of the keyboards casing and i will add holes and connectors for HDMI and USB power the cord will be cut and wired to the Pi inside the case.This way i can plug devices into the integrated hub (such as a mouse or a USB stick, WiFi or another Hub) and...

52 Replies

57,400 Views

Unirse Started by u/Yuki • December 05, 2016, 07:44:39 AM

My Christmas tree

Video of it in action (sorry for bad lighting but you get my point )I think I made that a few years ago, made it again this year, got some fakeish plastic Christmas tree-like cone and a battery-powered set of lights at the dollar store, put those together, wired where the batteries would be to my TI C2000 Launchpad (becaus...

11 Replies

14,116 Views

Unirse Started by u/c4ooo • October 26, 2016, 09:36:54 PM

Any good PC case you guys want to recommend?

First of all, I prefer something cheap. I don't want to dish out 100$ for what is essentially a piece of metal. (Yes I know a CPU is also essentially a piece of metal too but hopefully you get my point )I have some links I have been looking at, but imr on my phone right now.

20 Replies

17,402 Views

Unirse Started by u/Dudeman313 • October 24, 2016, 10:50:25 AM

Hmm...Brainstorm w/ me?

I have a working Panasonic landline handset w/ a damaged speaker, a Nokia E63 with a damaged LCD, and an RCA recording and playback device.What can I make if I take em all apart and try to fit things together?

18 Replies

25,461 Views

Unirse Started by u/semiprocoder • August 08, 2016, 12:37:37 AM

Semiprocoder's Pebble Stuff

I just recently bought myself a pebble time. The battery life(for me) wasn't seven days(it was ~3), but I was using it a lot.Since the pebble has a really neat sdk, I just finished my first project(pong) after perhaps a day or two of learning the sdk. I suspect that uploading and playing my game quite often wasn't good for battery life.Anyways, does anyone else here have a pebble, and do you program it?Here are my published pebble projects(will be updated once I make more): ...

5 Replies

10,194 Views

Unirse Started by u/Unicorn • February 21, 2016, 10:46:55 PM

Unicorn's Arduino Explorations

Hey! So I just recently got myself an arduino mega, an ethernet shield, and a 2.8" LCD TFT Capacitive touch breakout board from adafruit. This is were I'll be posting about my adventures and questions with and about these items. I also want to know, are there any good, simple calc modding things that I could do with an arduino? I do have the 83+ SE for its spacious case.So the first thing I did:I created [url= ;path=/84pce/asm/games/CircleIT.zi...

21 Replies

25,376 Views

Unirse Started by u/CVSoft • July 21, 2016, 07:24:48 AM

CVSoft's Automatically Controlled Amateur Radio Thingy

I still don't know what to call this. It'll be some kind of information terminal accessible over 70cm amateur radio, using both text-to-speech and speech-to-text. So far, I have code to get the current weather conditions written for it, well before I finished any of the backend components. It's designed for Orange Pi One (it's cheap \o/), but can work on normal RasPi or even Windows! Once I can tell that code is at least marginally functional, it'll be op...

5 Replies

9,870 Views

Unirse Started by u/Jokeriske • April 04, 2016, 07:29:29 PM

Custom Server

Server Build so, i want to make or build or buy a server but i have no idea which one or which parts i should buythe main purposes are to host game servers on, like TF2 , battlefield, minecraft, rest house ... etc.but i have really no clue what it needs.so, if anyone could help me out that would be so great ( I will add my current server's details in a few days. )

19 Replies

19,459 Views

Unirse Started by u/alexgt • March 09, 2016, 01:50:11 PM

FRC Robotics

So I am opening this fourm kinda late in the race but we can still use it year round.I am a programmer from team 5712 , this is how we did at the Standish competition in Standish MI here So I am making this topic to share ideas and offer help.We don't have our 2016 robot on there so here is a picture: http://blob:https%3A//drive.google.com/8c02ec62-ce91-4622-acd4-22aa400dcae4 http://blob:https%3...

8 Replies

12,220 Views

Unirse Started by u/DarkestEx • February 26, 2016, 01:37:11 AM

DarkestEx' own CNC machine

Hello everybody!I have been working on my own tabletop CNC machine recently as I always wanted to build one. You can see more photos here: should be capable of cutting plastic (PLA, ABS, etc.), wood (even harder woods) and some metals (maybe thin aluminium and PCB copper).

10 Replies

14,277 Views

Unirse Started by u/Ephraim Becker • March 17, 2016, 04:10:30 PM

Re-inventing the wheel by programming in binary from scratch

I want to learn binary from scratch (example: learn how to program drivers, display pixels on the screen, and make an Operating System in binary from scratch). I want to be able to program from the lowest level possible (which everybody did in the 1970's). I don't like relying on other people's code at all. I feel like me re-inventing the wheel will open up new possibilities for me in technology. I want to actually change the world. I don't want to be known as a simple "typical programmer" just ...

15 Replies

18,353 Views

Unirse Started by u/Dream of Omnimaga • March 17, 2016, 12:15:42 AM

MOVED: What type of screen should I build if i'm using it to cover house windows

This topic has been moved to Randomness .

0 Replies

6,527 Views

Unirse Started by u/alexgt • December 17, 2015, 09:47:32 PM

3D Printing

Recently, I made a holster for my airsoft pistol, I have pictures but haven't had time to upload them to youtube. - SDramps module - 8x8x9.5 inch print bed - Heated print bed - 0.4 mm extruder tip - I use PLA mostlyCons: - Does not do bridges well but I am quite sure it is the way I have it set up ...

54 Replies

57,310 Views

Unirse Started by u/caleb1997 • January 19, 2016, 09:12:58 PM

Connecting a TI-84+CE to a GBA [gba] [nintendo] [ds]

All right then.... I just bought a Gameboy C O L O R GBA and taking a look at it, I noticed something...The Gameboy has a USB port.... that just happens to be almost the exact same as my C (S) E's. Immediately, the idea popped into my head that I could possibly link it to my C S E.What do you guys think? Is it possible to link my calc to a Gameboy Nintendo ...

57 Replies

49,357 Views

Unirse Started by u/DarkestEx • January 25, 2016, 05:09:31 PM

Mini 8 euro WiFi routers for IoT and other cool stuff

Hello guys, I just discovered this nice piece of tech when I was looking for small portable routers: ;redirect=true&ref_=oh_aui_detailpage_o00_s00It is a Hame MPR-A1 clone with 32 MB of RAM, 4 MB of flash, USB 2.0 host, UART and I2C broken out to pins, Ethernet and WiFi b/g/n (150 Mbit/s).The processor is a Railink RA-5350f that runs at 360 MHz and is based on the MIPS architecture.Another cool thing is, that with an I2C I/O expander, this thing cou...

13 Replies

15,703 Views

Unirse Started by u/Snektron • January 18, 2016, 02:46:42 PM

MOVED: Unnamed Z80 computer DIY kit

This topic has been moved to Ninjabyte Electronics (hardware) .

0 Replies

6,962 Views

Unirse Started by u/Ivoah • October 05, 2015, 03:13:50 AM

CHIP - The World's First Nine Dollar Computer by Next Thing Co.

Earlier this year I backed the C.H.I.P computer on kickstarter: initially got one for my little brother to learn to program/use linux, but then decided that I was so tiny and cheap that I needed one for myself too I have a 320x240 LCD module that I use with my Pi, and hopefully will be able to get to work with the C.H.I.P.I'd have a super tiny computer that would probably even be able to run PICO-8 (once/if zep releases a Pi version).It has built-in WiFi, bluetooth, 4 GB f...

30 Replies

41,128 Views

Unirse Started by u/Dream of Omnimaga • January 04, 2016, 05:58:06 AM

MOVED: Caleb Learns Linux

This topic has been moved to General Help & Troubleshooting .

0 Replies

16,573 Views

Unirse Started by u/Dream of Omnimaga • January 04, 2016, 05:57:39 AM

MOVED: My browser isn't working.

This topic has been moved to General Help & Troubleshooting .

0 Replies

16,314 Views

Unirse Started by u/Dream of Omnimaga • January 04, 2016, 05:56:34 AM

MOVED: 3DS dilemma, need advice

This topic has been moved to Consoles .

0 Replies

16,417 Views

Unirse Started by u/DarkestEx • June 09, 2015, 06:21:03 PM

Restauration and modernisation of an old rotary dial phone

Hey, guys.I was on a flea market last Sunday, where I bought an old, 50's rotary phone for 18€ (~20$).My idea was to get it going with our analog, business DTMF telephone system.At the beginning I wanted to build the converter by my own, but my dad probably doesn't like the idea of using a not 100% tested device on our telephone system and actually bought me a converter for about 40€ (~44$).I restaurated, took apart, cleaned and repaired it. When the converter arrives tomorrow or in two days, I'...

57 Replies

60,485 Views

Unirse Started by u/Keoni29 • November 05, 2015, 10:38:31 PM

Displaying bitmaps on an oscilloscope

I turned my oscilloscope into a raster display using an FPGA. It generates the horizontal and vertical sweep signals to draw the screen in X. Y mode and then modulates the beam to create the image.A 256x256 dots image is stored in a framebuffer. I can send bitmap files to it from my pc. The data transfer rate is 4Mbit/s. This allows me to animate the image at 60FPS. can use this display for other projects. Eventually I hope to make a computer game that...

17 Replies

29,721 Views

Unirse Started by u/semiprocoder • September 29, 2015, 10:08:03 PM

Arduino Benchmark

About half a year ago I made a benchmark for the arduino because I wanted to see how much faster my then new arduino due was than my arduino uno and micro. I don't know why, but I decided that I will(perhaps, not sure yet) start programming arduino again(since that benchmark I pretty much didn't even touch arduino anymore). The main reason that I stopped arduino was cause I suck at hardware stuff so I couldn't really do anything special, but I did make pong(and I tried to make don't touch the sp...

23 Replies

38,005 Views

Unirse Started by u/Vijfhoek • September 30, 2015, 12:42:06 AM

4xxx logic computer

Hey, it's been a while since I've been active here, which is really something I should do something about. So how about posting this project I've been working on lately here? Sounds like a plan!Recently I got a bunch of wires, breadboards and logic ICs (4070 (xor), 4071 (or), 4081 (and) and 4539 (4-input mux) to be precise), with which I'm planning on making a (probably) 8-bit computer. Currently, I'm working on figuring out how to most efficiently make it - breadboards are really quick but a cl...

5 Replies

20,474 Views

Unirse Started by u/Dream of Omnimaga • July 31, 2015, 06:32:50 AM

Lexus Hoverboard?

So apparently, Lexus, the car company, made an hoverboard: ;articleid=45683566&source=facebook ;redir_token=URQin_2_QbbPWB9dBdNqQ47SXi58MTQzODQxMDM5MkAxNDM4MzIzOTky am unsure if it's a late April fools joke, some sort of ad to one of their new cars or if it's actually real, but I am curious about how practi...

21 Replies

30,383 Views

Unirse Started by u/DarkestEx • June 23, 2015, 10:00:25 PM

Tiny Basic Microcomputer / Calculator

Heya guys!A few weeks ago I was working on another of my old projects, which actually got me into electronics. It was a build from the Ben Heck Show.I started with electronics for building this project, but back then I wasn't able to make it, but now this is not a problem anymore.The project is to build a small, BASIC computer with an ATMega328p or similar and a 4x20 LCD and a XBox 360 Chatpad.The programming and the breadboard part is done. There's only one program bug to fix and still needs to...

17 Replies

31,444 Views

Unirse Started by u/Keoni29 • December 20, 2014, 05:27:59 PM

CBS6000 - an 8-bit 6510 computer

What is the cbs6000? The CBS6000 is an 6510-based system with lots of interface options including: ADC, UART, FSK modem, Line Printer, Seven segment display.The system contains 128KB of ram as well as an 8kb eeprom which holds the firmwareThe operating system is a customized version of the woz monitor. Added features are:ACIA input/output, casette load/save, serial load and a seven segment display driver. Project page: ...

104 Replies

90,226 Views

Unirse Started by u/Keoni29 • July 01, 2015, 02:01:09 PM

Building a Gameboy Oscilloscope

I recently picked up an incomplete electronics kit for making a Gameboy oscilloscope cartridge. The kit contained an unpopulated circuitboard, some random chips and a diskette with link software.Apparently this kit was published by an electronics magazine. This is the article that went with it: almost have all the required parts for it except for some rare chips. Here are some pictures:

5 Replies

20,417 Views

Unirse Started by u/DarkestEx • June 30, 2015, 05:04:28 PM

The ultimate extension Module for Gamebuino: The Ninja Board

Hey guys!@adeko (from Gamebuino.com) and I have been working on the ultimate extension board for the Gamebuino: The Ninja BoardThe features- Boosts SRAM to 129 KB!- 128x64 OLED for extra status information like texts, maps, images- Intelligent keypad matrix for text and other input on the Gamebuino; customizable by games- ATmega328pu coprocessor @ 8 MHZ- Plugs right into the I2C and the SPI bus of the Gamebuino (connects to the Gamebuino's top)- Connections for more SPI devices on the Coprocesso...

21 Replies

34,094 Views

Unirse Started by u/novenary • February 02, 2015, 10:53:29 AM

Raspberry Pi 2

, it's a thing. They (finally) upgraded that piece of trash they called a CPU, and upgraded the RAM to 1GB. Thatd pretty much all but I'm definitely buying it.

41 Replies

47,086 Views

Unirse Started by u/DarkestEx • May 07, 2015, 12:13:15 AM

Using a Router to program and communicate with Atmel AVRs

I bought myself a Netgear WNR2200 Router. Not that I need it for it's original purpose, but it is a quite advanced little Linux computer with Wifi and USB actually.It also has 4 MB Flash for the kernel (you can still use USB with overlay ext4 or fat32 fs to expand up to 32 GB or even more). I built my own firmware for it, which is based on the same Linux distribution as the stock one: OpenWrt.I am using the trunk version Chaos Calmer which works great on this model, although I needed to patch so...

17 Replies

31,579 Views

Unirse Started by u/Unicorn • June 05, 2015, 05:00:23 AM

Macintosh PowerBook 190cs [Fix?]

Well, I just acquired a Macintosh PowerBook 190cs. It seems like the place where the power cord is plugged in is not connected well enough. When wiggling the connection around, the screen occasionally flashes yellow. Anyways, I was thinking, could this be fixed? I'm going to open it up and take some pictures tomorrow.So, yeah, It might be cool to have around.

7 Replies

19,935 Views

Unirse Started by u/DarkestEx • May 03, 2015, 10:24:29 PM

ZipIt Z2 - Mini hackable Linux computer with LCD, Keyboard, Wifi and GPIO

Hey, I found and bought myself a ZipIt Z2, which is a tiny little computer with a keyboard, an LCD, and ARM XSCALE processor @ ~400 MHZ and an sd card.It also has wifi, usb host and is just a really nice hackable gadget.Here's a photo of it: I hope you all like that cute little device as much as I.It runs Arch Linux, OpenWRT and Debian.You can get it for ~50$ here...

49 Replies

56,256 Views

Unirse Started by u/Keoni29 • November 17, 2014, 10:39:48 PM

Visicom Textphone Reverse-engineering

The Visicom is a textphone for deaf people from the 80's. It has a keyboard, video output and built in modem. You could use it as a textphone using the textphone protocol or as a teletype (tty) using the built in modem.I bought this at a thriftshop because it looked interesting.I decided to crack it open and find out exactly what makes it tick. Detailed documentation can be found on my project page: ...

65 Replies

104,199 Views

b/Hardware