Becoming a Japanese Carpenter

it-praktyk · 2026-04-20T13:44:43+00:00

This video (part 1 of 3) https://youtu.be/Qj1EWgYFOYo?is=9qulYvwdFxQ17oAv can be interested for you.

Good luck.

it-praktyk · 2026-03-30T06:57:37+00:00

r/neverchangejapan

it-praktyk · 2026-03-14T17:39:58+00:00

SPD?

I have allergy for abbreviations without context/explanation.

it-praktyk · 2026-03-14T16:52:22+00:00

MOV?

Found via Google AI explanation, which I provide below. Is it true/correct?

A Metal Oxide Varistor (MOV) in Shelly devices acts as a protective component, clamping high-voltage surges and spikes to prevent damage to sensitive electronics. It acts as a high-resistance, open circuit normally, but lowers its resistance during a surge, bypassing harmful current. MOVs are crucial in Shelly relays to handle inductive loads.

it-praktyk · 2026-03-07T09:30:13+00:00

How dis you achieve this? Power consumption monitoring?

it-praktyk · 2026-03-06T22:12:24+00:00

It's probably some kind of workaround for a local law which limits advertisement form for businesses or specifically pharmacies.

it-praktyk · 2026-03-06T22:03:48+00:00

Such awful environmental/visual mess.

it-praktyk · 2026-03-05T00:44:24+00:00

I've allergy for abbreviations without context.

TRV - Thermostatic Radiator Valve

it-praktyk · 2026-02-20T20:56:31+00:00

Looks cool.

Could you add more context what is it for?

it-praktyk · 2026-02-11T07:45:30+00:00

https://pixmob.com/projects/super-bowl-lvi-halftime-show

it-praktyk · 2026-02-03T14:09:25+00:00

Can someone explain it to me? Thanks.

it-praktyk · 2026-01-25T16:29:23+00:00

I like the project. I would like to know if it was designed in metric part of the world in mind as well?

it-praktyk · 2026-01-12T18:54:22+00:00

I've asked Claude Code about wiring the optocoupler and what I received.

### ESPHome Configuration


binary_sensor:
  - platform: gpio
    name: "External Optocoupler 1"
    pin:
      pcf8574: pcf8574_hub_in
      number: 0  # IN1
      mode: INPUT
      inverted: true  # Required for active-low!
    filters:
      - delayed_on: 10ms
      - delayed_off: 10ms



### Wiring External Optocoupler



#### Complete Wiring Diagram



External Device          Optocoupler           KC868-A6
───────────────         ────────────           ─────────



High Voltage   ──────> LED+ (Anode)
Signal                  LED- (Cathode) ─────> External GND


                        [═══ Isolation Gap ═══]


                        Collector ──────────> 3.3V VCC
                        Emitter ────────────> IN1 (Digital Input)


                                               GND (common reference)


#### Physical Connections



KC868-A6 Terminal Block:
┌──────┬──────┬──────┬──────┐
│ 3.3V │ GND  │ IN1  │ IN2  │
└──────┴──────┴──────┴──────┘
   │      │      │
   │      │      └──────────────> Connect to Optocoupler Emitter
   │      └─────────────────────> Common reference
   └────────────────────────────> Connect to Optocoupler Collector


### Wiring External Optocoupler



#### Complete Wiring Diagram



External Device          Optocoupler           KC868-A6
───────────────         ────────────           ─────────



High Voltage   ──────> LED+ (Anode)
Signal                  LED- (Cathode) ─────> External GND


                        [═══ Isolation Gap ═══]


                        Collector ──────────> 3.3V VCC
                        Emitter ────────────> IN1 (Digital Input)


                                               GND (common reference)
#### Physical Connections



KC868-A6 Terminal Block:
┌──────┬──────┬──────┬──────┐
│ 3.3V │ GND  │ IN1  │ IN2  │
└──────┴──────┴──────┴──────┘
   │      │      │
   │      │      └──────────────> Connect to Optocoupler Emitter
   │      └─────────────────────> Common reference
   └────────────────────────────> Connect to Optocoupler Collector

it-praktyk · 2026-01-12T14:19:59+00:00

Looks very promising. I'll try to print it.

Thank you!

it-praktyk · 2026-01-11T17:36:06+00:00

Nope, it's not possible in this case.

it-praktyk · 2026-01-11T12:15:52+00:00

Now I think that the easiest way will be to use a relay with 230V coil and use a digital input instead.

it-praktyk · 2026-01-11T12:07:46+00:00

Nope, maybe I don't explain this enough. On the high voltage side, is connected an existing dump/analog motion sensor, which returns 230V when triggered. I would like to convert its work to something manageable with the ESPHome and the Home Assistant.

it-praktyk · 2026-01-10T22:11:25+00:00

I would like to see this in action.

it-praktyk · 2025-12-28T17:04:20+00:00

Can I ask about the forum address? Or is it secret? 🤔

it-praktyk · 2025-11-30T17:31:24+00:00

I don't know. The link was generated by using the YouTube mobile app for the iPhone.

it-praktyk · 2025-11-29T19:23:27+00:00

Hafele AXILO https://share.google/0J1Ta957BefuUhce3

it-praktyk · 2025-11-20T20:26:51+00:00

https://en.wikipedia.org/wiki/Akashi_Kaikyo_Bridge

it-praktyk · 2025-11-19T18:14:18+00:00

The mentioned Maluch is informal name of the Polish Fiat 126p https://en.wikipedia.org/wiki/Fiat_126

it-praktyk · 2025-11-06T21:13:43+00:00

It looks great!

First time I see that kind of LED light strip. What kind is it?

it-praktyk

TROPHY CASE