Ulvain @ Ulvain @sh.itjust.works

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241

Joined

2 yr. ago

"systemic human resources roadblock removal"

I was going crazy going 'shit, i KNOW i read this before, it cannot be a 2025 article...'

Vindication!

https://abc7ny.com/nurses-nurse-pregnant-nyu-winthrop-hospital-in-mineola/5235663/

What plastic duct? It's a standard foil one, but had a break in a couple of spots and since we're replacing it by a new one next week, we have a piece of tape on it... Am i referring to the wrong thing?

UPDATE thanks all for the comments, just a few clarifications and updates:

• all electrical work is work-in-progress, we're finishing it up tomorrow, it's still an active worksite. The old outlet and old bx wiring is being removed, we'll only have the newer wiring (and of course all outletd will be in their gangboxes and covers will be on)
• the dryer vent will be changed and installed without sag when we finalize
• the 4" abs drain connects to the old one with a rubber fernco gasket, those do require hose clamps and they're up to code (though the top clamp could be straightened!)
• the water lines are pex, they're all good
• we don't have a choice but to push the water up with the washer pump - the drain evacuates to the city sewer around hip level in that basement

The worries for me are really the 90° out of the sump pump and the other 90° into the drain column, shouldn't that be a downward Y? And the double S p-trap, is it creating some risk?

The top one, where the washer drain comes in? Or further down?

For the record he also connected the sump pump pipe like this, with a 90° - shouldn't it be a downward Y instead?

They should have used a plumbus

This might actually be a good opportunity for an AI answer:

--

First, understand the basic principle you're working with:

Shopping cart wheel locks respond to a specific RF (radio frequency) signal (typically around 7.8 kHz to 10 kHz for many systems, but it varies by brand).

In normal operation, the boundary wire emits this signal constantly.

The unlocking posts emit a different coded signal to reset the wheel.

So to design a portable device that could lock and unlock wheels manually anywhere, you would need:

1. Identify the Signals

You must figure out the exact frequencies and modulation patterns used by the cart system.

Different companies (like Gatekeeper Systems, Carttronics, etc.) use slightly different RF signatures.

Usually lock signal = basic broadcast (constant tone) Unlock signal = special modulated unlock code or sequence.

This might require:

A spectrum analyzer

Or reverse-engineering an existing unlock station.

2. Design the Portable Emitter

The portable device needs:

A programmable low-frequency RF transmitter (around 8–10 kHz range, low power)

A microcontroller (Arduino, ESP32, etc.) to generate the right modulation if the signal is coded

An amplifier to make the signal strong enough to reach the cart wheels (they usually detect it within 3–10 feet)

Optionally:

Two modes: a "lock" mode (sending the boundary signal) and an "unlock" mode (sending the unlock code).

3. Basic Hardware Components

Low-frequency oscillator (to generate 7.8–10 kHz wave)

Microcontroller (to handle switching, coding)

Coil antenna (for strong near-field transmission — like a small induction coil)

Amplifier circuit (boost the signal so carts sense it a few meters away)

Battery pack (portable, rechargeable — say 12V lithium-ion)

Mode selector switch (Lock / Unlock)

4. Software

Simple microcontroller code to:

Emit plain carrier signal = Lock mode

Emit modulated code = Unlock mode

Example (pseudo-Arduino code):

if (mode == LOCK) { generateContinuousTone(8kHz); } else if (mode == UNLOCK) { generateUnlockCode(); }

5. Important Challenges

Matching signal format exactly: If the unlock signal is digitally modulated (like FSK or ASK), you must match the timing perfectly.

Power levels: Too much power could fry circuits or interfere with nearby electronics. Keeping it safe is key.

Legal considerations: Broadcasting radio signals, even low-power ones, can be restricted depending on the country.

Simple Concept Sketch:

[Portable RF Cart Lock/Unlock Device]

Size: About a large walkie-talkie

Two buttons: Lock / Unlock

Coil antenna: About 3–6 inches

Range: 1–3 meters effective

Display: Small LED indicators (Locking / Unlocking / Signal OK)

In short: You're essentially building a portable invisible "fence" generator with two channels: a "keep away" signal (lock) and a "come back" signal (unlock).

Interesting thank you! Not yet the tiny no bells no whistles electric pickup I'm hoping for, but it's nice to see Canadian alternatives for things i didn't know we did!

🤮

My exact thought! I wish a Canadian startup did exactly that, I'd buy one immediately

Right? I mean hindsight is 20/20 and all that, but come on...

Now it means technically you'd need some kind of shared enforcement accountability - but how to make any congress-controlled or judicial-controlled enforcement group big enough to compete with the US army when push comes to shove.... 🤷‍♂️

All forces of enforcement of laws being created by one branch or interpreted by another being basically under the third, which incidentally is the one branch with an all powerful executive means the whole checks and balances was flawed from the get go, and assumed way too much good faith leadership, IMO

I think Mark Carney should call her out loudly and publicly for being unCanadian

"could"?!!?!?

Just donated to Wikipedia. Will do every time this fuckers brings it up

You would love the south of Italy

I would say come here to Canada, but... 🤷‍♂️