criptych

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

Avoiding padding errors with Python's base64 encoding

>>> import base64
>>> data = '{"u": "test"}'
>>> code = base64.b64encode(data)
>>> code
'eyJ1IjogInRlc3QifQ=='

	/*
	After purchasing a humble book bundle, go to your download page for that bundle.
	Open a console window for the page and paste in the below javascript
	*/
	$('a').each(function(i){
	if ($.trim($(this).text()) == 'MOBI') {
	$('body').append('<iframe id="dl_iframe_'+i+'" style="display:none;">');
	document.getElementById('dl_iframe_'+i).src = $(this).data('web');
	}
	});

	#!/usr/bin/python

	import nmap


	target_mac = '<Enter MAC Adress>'

	nm = nmap.PortScanner()

	nm.scan(hosts='192.168.1.0/24', arguments='-sP')

	/**
	* OpenCV video streaming over TCP/IP
	* Client: Receives video from server and display it
	* by Steve Tuenkam
	*/

	#include "opencv2/opencv.hpp"
	#include <sys/socket.h>
	#include <arpa/inet.h>
	#include <unistd.h>

	def inverseMod(a, m):
	for i in range(1,m):
	if ( m*i + 1) % a == 0:
	return ( m*i + 1) // a
	return None

	def gcd(a, b):
	"""Calculate the Greatest Common Divisor of a and b.
	Unless b==0, the result will have the same sign as b (so that when
	b is divided by it, the result comes out positive).

	"""
	Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy)
	BSD License
	"""
	import numpy as np

	# data I/O
	data = open('input.txt', 'r').read() # should be simple plain text file
	chars = list(set(data))
	data_size, vocab_size = len(data), len(chars)

criptych

Raspberry Pi Zero OTG Mode

Avoiding padding errors with Python's base64 encoding

Control KP39EM2-006 Stepper Motor by Arduino

Schematic

Arduino

AGB-001 Front/Backlight Mod Instructions

AGB-001 Backlight Mod

Requirements

	#include <math.h>
	#include <stdio.h>

	struct Q { float x, y, z, w; };

	float dot(Q l, Q r)
	{
	return l.x * r.x + l.y * r.y + l.z * r.z + l.w * r.w;
	}