hmn

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1
How I broadcast LoRa packets WITHOUT a radio (www.youtube.com)
If you could have one small thing as a superpower. What would it be and why? in c/asklemmy@lemmy.ml
[–] hmn@lemmy.staphup.nl 2 points 1 year ago* (last edited 1 year ago)

mustard seed size faith πŸ˜„

You don’t have enough faith,” Jesus told them. β€œI tell you the truth, if you had faith even as small as a mustard seed, you could say to this mountain, β€˜Move from here to there,’ and it would move. Nothing would be impossible.”(Matthew 17:20)

1
Protecting ADC Inputs (www.analog.com)
 

Protecting ADC Inputs

A common issue that arises when designing an ADC circuit is how to protect the ADC inputs from overvoltage. The protection of ADC inputs has many scenarios and potential solutions. ADCs from all vendors have similar needs in this respect. This article gives insight into what issues can arise in the case of overvoltage, how it occurs, and potential remedies. ...

by Alan Walsh

What screams "poorly educated"? in c/asklemmy@lemmy.ml
What is something many people believe but is not true? in c/asklemmy@lemmy.ml
[–] hmn@lemmy.staphup.nl 8 points 1 year ago* (last edited 1 year ago)

That ivermectin is a hazardous medicine..

It's actually donated by Merck since 1970's to African countries to fight river-blindness! The safety profile is well established and it's safe. https://mectizan.org/

1
HowTo: Moving Objects - from Hoverboard to Bobby car (media.ccc.de)
 

39 min 2018-05-11

Reverse engineering Hoverbard hardware for fun.

In this talk you will learn how to flash your Hoverboard hardware with custom firmware to use it as an universal platform for all kinds of moving objects including armchairs, beverage crate, go karts...

We begin with details and reverse engineering of original hardware and software. You will learn about our own software we developed for this hardware and how to flash it to your board. A good amount of time will be about hands-on tips on how to build you moving objects, both mechanical and electrical advice.

There is also a workshop that you can join if you actually plan to build something.

1
HOVERBOARD MOTOR HACK - useful for Arduino robot projects (www.youtube.com)
 

This experiment will show how easy the Hoverboard controller can be manipulated. As shown in the video a TxD signal was given to all 4 inputs of the two motor controllers. In a robot project that would of course be a bit different. Then 2 UART (2x TxD) would drive the 4 wheels, per side a motor controller with 2 wheels.

Config of the USART-Communication: 22500,N,9,1. That means 22500 Baud with 9 Data-Bits, no Parity, one Stop-Bit.

Example of the data transfer:

Data to send 6 Bytes (9 Bit) for STOP (Speed= 0000): 100h, 000h, 000h, 000h, 000h, 055h

Data to send 6 Bytes for 10% FORWARD (Speed= +0150d): 100h, 000h, 096h, 000h, 096h, 055h

Data to send 6 Bytes for 10% BACKWARD (Speed= -0150d): 100h, 0FFh, 06Ah, 0FFh, 06Ah, 055h

Range for the variable "Speed" (decimal): -1600 ... 0 ... +1600

But I have seen different Motor-Controller with some Variation in the Speed-Range and Baud-Rate, so everyone have to figure out the Value for a specific Motor-Controller...