I replaced an old Quantum SCSI hard disk drive in an Apple Mac SE FDHD this afternoon. A project long overdue! I needed to use the third-party Lido hard drive management and partition utility to get the Apple to recognize a non-Apple hard disk drive. Just as proprietary and “closed ecosystem” back then as they are today!
Category Archives: Projects
Minnesota Radioddity GD-88 Codeplugs for DMR
The Radioddity GD-88 is a neat, inexpensive new dual VFO analog/digital handheld transceiver. Since no codeplugs are publicly available for this transceiver that I have found, I made one based on the Anytone Codeplugs by Eric Ganske, W0EDG.
Check out the instructions and codeplugs at the link below:
Alpine iLX-F409 Halo9 9″ Touchscreen w/ Android Auto & Apple CarPlay Install in 1988 3rd Gen Camaro
Here’s a finished installation of Alpine’s iLX-F409 9″ Halo9 Multimedia Touchscreen Receiver w/ Bluetooth, SiriusXM, Hands-Free Kit, Android Auto, Apple CarPlay, HDMI in/out, and rear backup camera, in a 1988 Third Generation Camaro. The iLX-F409 is among a small handful of receivers that install in a single-din slot, have a permanent (non-mechanized) touchscreen, and support Android Auto.
For installation in a third generation Camaro, the following parts were acquired and installed:
– Alpine iLX-F409 Halo9 Multimedia Receiver w/ Sirius Tuner: https://smile.amazon.com/gp/product/B…
– Crutchfield Single DIN mounting kit for 82-92 Camaro (already had this per previous Kenwood receiver installation)
– Parking Brake Bypass Module for Alpine: https://www.ebay.com/itm/265100742220
– Composite Backup Camera w/ Hidden Rear License Plate Mount: https://smile.amazon.com/gp/product/B…
The background wallpaper on the receiver is customizable, and the 80s retro cyan and magenta Camaro background was designed in Photoshop by yours truly.
Wiring Details that I noted on my car (yours could be different, so proceed with caution):
Alpine System Colors === Camaro Wiring Harness Colors
REMO (Blue/White) === Power Control terminal on amplifier AND Blue on Parking Brake Bypass
REVERSE (Orange/White) === Light Green on Transmission (Reverse Switch on Gear Selector) and Red Wires on Backup Camera
P.ANT (Blue) === Red (Power Antenna)
PARKING BRAKE (Yellow/Blue) === YELLOW on Parking Brake Bypass
ACC (Red) === Yellow (12v IGN switch)
BATT (Yellow) === Orange (12v all the time)
GND (Black) === Black (Ground) AND Black (Ground) on Parking Brake Bypass
Green === Yellow Left Rear+
Green/Black === Dark Brown Left Rear-
White === Light Brown Left Front+
White/Black === Light Grey Left Front-
Gray/Black === Light Green Right Front-
Gray === Dark Green Right Front+
Violet/Black === Blue Rear Right-
Violet === Light Blue Rear Right+
=========
Parking Brake Bypass:
1 BLACK wire on Bypass to radios black wire (radio ground wire(-))
2 BLUE wire on Bypass to BLUE/WHITE STRIPE wire ( remote turn on (+)) on Alpine Radio
3 YELLOW wire on Bypass to YELLOW/BLUE wire [Parking Brake(-)] on Alpine Radio only
4 GREEN wire on Bypass NOT CONNECTED
=========
Automatic Transmission Switch:
Left/Driver side of transmission body, 2 prong plug, underneath shifter.
Dark Blue: +12v Ignition
Light Green: +12v when in reverse (connect to REVERSE on stereo and red wires of backup camera)
A 5 1/4″ floppy drive connected with USB?
Yup…that’s a 5 1/4″ Floppy Disk Drive, connected via USB to my computer. This board called a Greaseweazle reads the raw flux transitions from a floppy disk and recreates them as disk drive image files for modern computers. I just found disks full of music, sound files, and BASIC source code that I haven’t heard or seen since 1991, lost deep in formatted-over disks on an obsolete media that was impossible to read. Until now…If you have any IBM-PC formatted 5 1/4″ disks that might have some memories on them, I’m your guy.
Next, I need to work on reading old Apple ][ disks.
A 5
New Bruce Smith Field Scoreboard
This is going to be so cool! I’ll have a training session tomorrow on this, and then I’ll be running this system live for the first football game of the year. Thanks to the Faribault Booster Club and all its sponsors.
Display Systems 19S-8 Vintage Eggcrate Display Technical Overview
For those of you that REALLY want to know the inner details behind my Vintage Light Display project, I made a technical overview video. You might be sorry you asked.
Display Systems 19S-8 Vintage Eggcrate Display Clock
There was a reason that CBS and other television networks used these type of displays on game shows when they had bright studio lights to contend with. The light is piercing from these!
Tonight, I got 22 wires soldered on 22 pins to mate with a Molex connector on the back of each display. Both digits are now directly connected up to the relay board. The software I developed can display an arbitrary 2-digit number, and then count up or down from that number until it reaches 00 or 99.
This has been a cool project! I’ll probably try to make a more detailed video in the future on the parts I selected and how all this works together.
Check out how this display worked on “Classic Concentration” hosted by Alex Trebek in the late 1980s: https://www.youtube.com/watch?v=1izUPd87wmw
Display Systems 19S-8 Vintage Eggcrate Display
Logic and software I wrote is all good! The correct plug didn’t come for the displays so I’ll have to hook the rest up later, but this is super cool!
A relic and mainstay of all classic 80s gameshows…
Initial Test of a Display Systems 19S-8 Vintage Eggcrate Display (Light Bulb Matrix), common to television game shows of the 1970s-1990s.
This is one of two Display Systems 19S-8 eggcrate displays that I purchased from Surplus Sales of Nebraska. I plan to integrate both into a working count up/count down timer powered by a ESP8266 microcontroller module and a couple of relay boards.
This eggcrate display uses a common 28 volt DC power source on one pin. Then, depending on which pin the ground is connected, will light each of one possible digit: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 and $. It’s also possible to display strange characters by connecting multiple grounds between pins.
I plan to use a single 150 watt 12 volt DC power supply to power dual boost controllers that will output the needed 28 volts. The 12 volts is still needed for the relay boards. The ESP8266 module will be connected to a 5 volt DC output from the relay board.
In both displays, I only needed to replace one lamp upon receiving them. The lamp is a common 1820 mini-bayonet style incandescent.
No, it’s not 1987, it’s 2019… (An Apple IIgs prints a “Print Shop” sign in 2019)
The sights and sounds of antique technology. I bought a new ribbon off of Amazon to see if that’s the only thing that was needed to bring this old ImageWriter II to life.
This is a fully operational Apple IIgs with a 5 1/4″ and 3 1/2″ floppy disk drive, color monitor, and ImageWriter II printer. The software running is “The Print Shop” by Broderbund.