Konrad Szwedo d4rn0k

Tutorial

Start at default curve.
Ctrl-click-drag any point in right-half to bend it until a point intersects with desired mhz/voltage.
Select point and adjust to perfection using shift-up-down.
Shift-click-drag empty space and select points (including selected point) on the right. Selected point should be left-most point.
Shift-Enter twice to flatten all points in selection area. They will flatten to match the selected point.
Adjust if required.

Controls

Sump pit water level sensor

This is an ESPHome configuration for an ESP32 that monitors a sump pump pit, using the ESP32 capacitive touch sensors, with a level being reported to Home Assistant.

ESP32 Wiring

The ESP32 is mounted on a piece of PVC pipe, with wires extending down to different lengths. I used a length of old ethernet cable I had sitting around.

There's also a wire at the bottom connected to the ground pin, and this gives more reliable touch sensor values. The USB32 is powered from USB.

Mounting VirtualBox shared folders on Ubuntu Server 18.04 LTS (Bionic Beaver)

This guide will walk you through the steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest.

Prerequisites

This guide assumes that you are using the following setup:

Oracle VM VirtualBox version 6.0.10 with Extension Pack installed
Microsoft Windows 7 SP1 as the host OS
A fresh install of Ubuntu Server 18.04.2 LTS as the guest OS

You could still make this guide work with other setups (possibly with some modifications to the commands and whatnot).

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/


	# MPV v3 Config - version 1.5
	# Date: 2025-05-08 16:14:44 +1000

	# REF: https://github.com/Argon-/mpv-config/blob/master/mpv.conf
	# REF: https://github.com/Zabooby/mpv-config
	# REF: https://gist.github.com/igv

	# ===== SEEKING =====

	# ESPHome config to control veneitan style blinds where a stepper motor has been attached to the spinning rod that lits the blinds one direction or other.
	# 3D printed model by sidoh:
	# https://www.printables.com/model/22186-retrofitted-motor-mount-for-blinds-automation
	# Cobble a bunch of code from the designer's config:
	# https://github.com/sidoh/esphome/tree/master
	# This is setup to use a ULN2003 driver. Also a bit of modification because saving the end_posotion
	# value didn't make sense.
	#
	# If it's not clear, this device is setup with 2 steppers for 2 different sets of blinds, left and right
	# Please pay attention to which direction your stepper motor is turning during the intial config

	AWSTemplateFormatVersion: '2010-09-09'

	Description: Extreme Performance Tuning Benchmark Environment


	Parameters:
	AmiId:
	Type: AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>
	Default: '/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2'

	blueprint:
	domain: automation
	name: Volume Control 2.0
	input:
	media:
	name: Media Players
	description: Media players to use
	default: []
	selector:
	target:

	Yunmai smart scale (M1301, M1302, M1303) Bluetooth LE protocol notes

	Commands are written to GATT attribute 0xffe9 of service 0xffe5. Responses come
	as value change notifications for GATT attribute 0xffe4 of service 0xffe0. These
	are 16-bit Bluetooth LE UUIDs, so nnnn is 0000nnnn-0000-1000-8000-00805F9B34FB.

	-----

	Packet Structure