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Black

Maker and homelabber. I write practical guides on 3D printing, home servers and budgeting for new parents.

Joined Joined on  Personal website https://github.com/BlacksGit
Your Real Hourly as a Delivery Driver: Spreadsheet Formulas for Gas, Mileage and Tax
blackspectre512 profile

Your Real Hourly as a Delivery Driver: Spreadsheet Formulas for Gas, Mileage and Tax

#spreadsheet #excel #productivity #tutorial
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3 min read

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How to Price Resale Items So You Actually Hit Your Profit (Excel and Google Sheets)
blackspectre512 profile

How to Price Resale Items So You Actually Hit Your Profit (Excel and Google Sheets)

#spreadsheet #excel #productivity #tutorial
Comments
3 min read
What does a 3D print really cost? Spreadsheet formulas for pricing prints
blackspectre512 profile

What does a 3D print really cost? Spreadsheet formulas for pricing prints

#3dprinting #excel #productivity #tutorial
Comments
3 min read
Building a printable invoice from a table in Excel and Google Sheets (no FILTER, no macros)
blackspectre512 profile

Building a printable invoice from a table in Excel and Google Sheets (no FILTER, no macros)

#excel #spreadsheet #freelance #productivity
Comments
2 min read
Spreadsheet formulas for a landlord rent roll (that handles early and late rent)
blackspectre512 profile

Spreadsheet formulas for a landlord rent roll (that handles early and late rent)

#excel #spreadsheet #productivity #realestate
Comments
3 min read
Generating daily path puzzles with exactly one solution (backbite, parity pruning and clue minimization)
blackspectre512 profile

Generating daily path puzzles with exactly one solution (backbite, parity pruning and clue minimization)

#kotlin #android #algorithms #gamedev
Comments
4 min read
Quarterly estimated taxes in a spreadsheet: uneven IRS periods, year-to-date SUMIFS and the 92.35% rule
blackspectre512 profile

Quarterly estimated taxes in a spreadsheet: uneven IRS periods, year-to-date SUMIFS and the 92.35% rule

#excel #spreadsheets #freelancing #productivity
Comments
3 min read
What Etsy actually takes from a sale, and the spreadsheet formulas to price around it
blackspectre512 profile

What Etsy actually takes from a sale, and the spreadsheet formulas to price around it

#etsy #spreadsheet #excel #smallbusiness
Comments
3 min read
Turning a weekly meal plan into an aisle-sorted grocery list with plain spreadsheet formulas
blackspectre512 profile

Turning a weekly meal plan into an aisle-sorted grocery list with plain spreadsheet formulas

#excel #spreadsheets #productivity #tutorial
Comments
3 min read
A seating chart that fills itself: TEXTJOIN, SMALL+ROW tie-breakers and date-relative checklists in a spreadsheet
blackspectre512 profile

A seating chart that fills itself: TEXTJOIN, SMALL+ROW tie-breakers and date-relative checklists in a spreadsheet

#excel #spreadsheets #productivity #tutorial
Comments
3 min read
Auto-categorizing bank transactions and simulating a debt snowball with plain spreadsheet formulas
blackspectre512 profile

Auto-categorizing bank transactions and simulating a debt snowball with plain spreadsheet formulas

#excel #spreadsheet #productivity #tutorial
Comments
3 min read
A 3D-printable folding chair-height stool: knees, gravity locks and a seat contour in Python
blackspectre512 profile

A 3D-printable folding chair-height stool: knees, gravity locks and a seat contour in Python

#3dprinting #python #cad #diy
Comments
3 min read
Growing a coral reef desk organizer with signed distance functions in numpy
blackspectre512 profile

Growing a coral reef desk organizer with signed distance functions in numpy

#3dprinting #python #procedural #cad
Comments
4 min read
Modelling a mimic chest dice box in Python: interlocking fangs and a filament hinge
blackspectre512 profile

Modelling a mimic chest dice box in Python: interlocking fangs and a filament hinge

#3dprinting #python #dnd #cad
Comments
4 min read
A signed distance function for a snail shell (log spiral) that became a 3D printed planter
blackspectre512 profile

A signed distance function for a snail shell (log spiral) that became a 3D printed planter

#showdev #3dprinting #python #math
1
Comments 2
3 min read
Growing fake tree rings in numpy: a 3D printed coaster where no two match
blackspectre512 profile

Growing fake tree rings in numpy: a 3D printed coaster where no two match

#showdev #3dprinting #python #numpy
Comments
3 min read
The moon always shows the same face, so my 3D printed moon phases do too (Python SDF)
blackspectre512 profile

The moon always shows the same face, so my 3D printed moon phases do too (Python SDF)

#showdev #3dprinting #python #tutorial
Comments
3 min read
One sine wave makes a true over-under celtic knot (3D printable, Python + manifold3d)
blackspectre512 profile

One sine wave makes a true over-under celtic knot (3D printable, Python + manifold3d)

#showdev #3dprinting #python #tutorial
Comments
3 min read
The Tusi couple: 8 beads in straight lines that roll as a circle (3D printable, Python)
blackspectre512 profile

The Tusi couple: 8 beads in straight lines that roll as a circle (3D printable, Python)

#showdev #python #3dprinting #math
Comments
3 min read
A true over-under Celtic knot and tree-ring coasters in Python (3D printable)
blackspectre512 profile

A true over-under Celtic knot and tree-ring coasters in Python (3D printable)

#python #3dprinting #math #numpy
Comments
3 min read
Four 3D-printable creatures from Python signed distance functions (bark, scutes, tentacles, bones)
blackspectre512 profile

Four 3D-printable creatures from Python signed distance functions (bark, scutes, tentacles, bones)

#showdev #python #3dprinting #procedural
Comments
4 min read
The Tusi couple in Python: 8 beads in straight lines that roll as a circle
blackspectre512 profile

The Tusi couple in Python: 8 beads in straight lines that roll as a circle

#python #math #3dprinting #geometry
Comments
2 min read
What I learned listing my first STL files on Cults3D (before any sale)
blackspectre512 profile

What I learned listing my first STL files on Cults3D (before any sale)

#3dprinting #beginners #sidehustle #makers
Comments
1 min read
Generate print-in-place flexi toys with Python and manifold3d
blackspectre512 profile

Generate print-in-place flexi toys with Python and manifold3d

#python #3dprinting #tutorial #opensource
Comments
2 min read
Print-in-place gimbal rings in Python: cone pins that never fuse (manifold3d)
blackspectre512 profile

Print-in-place gimbal rings in Python: cone pins that never fuse (manifold3d)

#python #3dprinting #tutorial #cad
1
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2 min read
3 print-in-place animals: tongue-flick frog, flexi axolotl and flexi octopus
blackspectre512 profile

3 print-in-place animals: tongue-flick frog, flexi axolotl and flexi octopus

#3dprinting #python #stl #makers
Comments
2 min read
Cut a spider web into a 3D-printable bowl with Python (manifold3d)
blackspectre512 profile

Cut a spider web into a 3D-printable bowl with Python (manifold3d)

#python #3dprinting #tutorial #halloween
Comments
3 min read
Carve a jack-o'-lantern in Python with signed distance functions (manifold3d)
blackspectre512 profile

Carve a jack-o'-lantern in Python with signed distance functions (manifold3d)

#python #3dprinting #tutorial #halloween
Comments
3 min read
4 holiday 3D print sets you can print this week (place cards, coasters, cutters)
blackspectre512 profile

4 holiday 3D print sets you can print this week (place cards, coasters, cutters)

#3dprinting #diy #christmas #maker
Comments
1 min read
Hyperbolic tiling in Python: draw Escher's Poincare disc and 3D print it
blackspectre512 profile

Hyperbolic tiling in Python: draw Escher's Poincare disc and 3D print it

#python #3dprinting #math #tutorial
Comments
2 min read
Gosper curve in Python: a space-filling L-system ornament for 3D printing
blackspectre512 profile

Gosper curve in Python: a space-filling L-system ornament for 3D printing

#python #3dprinting #math #tutorial
Comments
2 min read
Penrose tiling in Python: generate a 3D-printable aperiodic ornament
blackspectre512 profile

Penrose tiling in Python: generate a 3D-printable aperiodic ornament

#python #3dprinting #math #tutorial
Comments
2 min read
Generate 3D-printable ornaments in Python: torus knots and golden-angle petals
blackspectre512 profile

Generate 3D-printable ornaments in Python: torus knots and golden-angle petals

#python #3dprinting #maker #tutorial
1
Comments
2 min read
7 Christmas 3D Prints to Start Now (Advent Calendar, Ornaments, Cookie Cutters)
blackspectre512 profile

7 Christmas 3D Prints to Start Now (Advent Calendar, Ornaments, Cookie Cutters)

#3dprinting #diy #christmas #maker
Comments
2 min read
3D Print a Reusable Advent Calendar: 24 Boxes, Settings and Time Budget
blackspectre512 profile

3D Print a Reusable Advent Calendar: 24 Boxes, Settings and Time Budget

#3dprinting #diy #christmas #maker
Comments
2 min read
How to 3D Print Cookie Cutters That Actually Work (Settings + Free Recipe)
blackspectre512 profile

How to 3D Print Cookie Cutters That Actually Work (Settings + Free Recipe)

#3dprinting #diy #christmas #beginners
Comments
2 min read
Plan a Week of Dinners in 15 Minutes (and Stop Ordering Takeout)
blackspectre512 profile

Plan a Week of Dinners in 15 Minutes (and Stop Ordering Takeout)

#productivity #budgeting #lifestyle #beginners
Comments
1 min read
Calibrate a 3D Printer in the Right Order: An 8-Step Checklist
blackspectre512 profile

Calibrate a 3D Printer in the Right Order: An 8-Step Checklist

#3dprinting #klipper #maker #tutorial
Comments
2 min read
A 10-Minute Cleaning Routine That Actually Sticks (With a Weekly Focus Schedule)
blackspectre512 profile

A 10-Minute Cleaning Routine That Actually Sticks (With a Weekly Focus Schedule)

#productivity #lifestyle #home #beginners
Comments
1 min read
How to Plan Holiday Spending on Paper: A 20-Minute Method
blackspectre512 profile

How to Plan Holiday Spending on Paper: A 20-Minute Method

#productivity #personalfinance #budgeting #christmas
Comments
1 min read
Document Your Home Lab in One Hour: A Simple Structure That Works
blackspectre512 profile

Document Your Home Lab in One Hour: A Simple Structure That Works

#homelab #selfhosted #linux #networking
Comments
2 min read
Print Christmas Ornaments in 20 Minutes: Settings and Six Flat Designs
blackspectre512 profile

Print Christmas Ornaments in 20 Minutes: Settings and Six Flat Designs

#3dprinting #christmas #maker #diy
Comments
1 min read
9 Useful 3D Prints Under 3 Hours: Settings, Sizes and Tips
blackspectre512 profile

9 Useful 3D Prints Under 3 Hours: Settings, Sizes and Tips

#3dprinting #maker #diy #hardware
Comments
2 min read
52-week savings challenge: the numbers, three easier versions and a printable tracker
blackspectre512 profile

52-week savings challenge: the numbers, three easier versions and a printable tracker

#personalfinance #money #productivity #beginners
Comments
1 min read
Find Minecraft server lag with LagLens and cap it with CapLimit
blackspectre512 profile

Find Minecraft server lag with LagLens and cap it with CapLimit

#minecraft #java #fabric #devops
Comments
1 min read
Special Mobs Revived: 148 monster variants on Fabric 26.2
blackspectre512 profile

Special Mobs Revived: 148 monster variants on Fabric 26.2

#minecraft #gamedev #java #fabric
Comments
1 min read
Tale of Kingdoms: The Shattered Crown, an RPG campaign mod for Minecraft 26.2
blackspectre512 profile

Tale of Kingdoms: The Shattered Crown, an RPG campaign mod for Minecraft 26.2

#minecraft #gamedev #java #rpg
Comments
1 min read
Fallen Star: rare starfall nights and a boss fight in Minecraft 26.2
blackspectre512 profile

Fallen Star: rare starfall nights and a boss fight in Minecraft 26.2

#minecraft #gamedev #java #fabric
Comments
1 min read
Free pet care record checklist and monthly pet cost worksheet
blackspectre512 profile

Free pet care record checklist and monthly pet cost worksheet

#pets #dogs #cats #checklist
Comments
1 min read
Sky and Weather: clouds, aurora, storms and seasons for Minecraft 26.2
blackspectre512 profile

Sky and Weather: clouds, aurora, storms and seasons for Minecraft 26.2

#minecraft #gamedev #java #fabric
Comments
1 min read
Free holiday gift budget worksheet and November-December countdown
blackspectre512 profile

Free holiday gift budget worksheet and November-December countdown

#christmas #budget #personalfinance #checklist
Comments
1 min read
Realistic rain and reflective water for Minecraft 26.2 (Rain and Water mod)
blackspectre512 profile

Realistic rain and reflective water for Minecraft 26.2 (Rain and Water mod)

#minecraft #gamedev #java #fabric
Comments
1 min read
How to price 3D prints so you actually make money
blackspectre512 profile

How to price 3D prints so you actually make money

#3dprinting #business #makers #python
Comments
2 min read
Portal Gun for Minecraft 26.2 on Fabric: portals, live views and 90 test chambers
blackspectre512 profile

Portal Gun for Minecraft 26.2 on Fabric: portals, live views and 90 test chambers

#minecraft #gamedev #java #fabric
Comments
1 min read
Free chore ideas by age and a simple kids allowance system
blackspectre512 profile

Free chore ideas by age and a simple kids allowance system

#parenting #kids #chores #personalfinance
Comments
1 min read
Free home maintenance checklist: monthly and seasonal
blackspectre512 profile

Free home maintenance checklist: monthly and seasonal

#homeowner #maintenance #checklist #personalfinance
Comments
1 min read
Shorts Blocker: hide YouTube Shorts with a free browser extension
blackspectre512 profile

Shorts Blocker: hide YouTube Shorts with a free browser extension

#browserextension #youtube #productivity #webdev
Comments
1 min read
Free car maintenance schedule and cost-per-mile worksheet
blackspectre512 profile

Free car maintenance schedule and cost-per-mile worksheet

#cars #maintenance #personalfinance #checklist
Comments
1 min read
Wedding budget breakdown and 12-month checklist (free)
blackspectre512 profile

Wedding budget breakdown and 12-month checklist (free)

#wedding #budget #checklist #personalfinance
Comments
1 min read
TabZap: close duplicate browser tabs with one click
blackspectre512 profile

TabZap: close duplicate browser tabs with one click

#browserextension #youtube #productivity #webdev
Comments
1 min read
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