Posts

ROKU Express 4K review and setup

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My new gadget is a ROKU Express 4K Roku Express 4K Model# 3940EU If you are looking to buy a streamer teh Roku express 4K is worthy choice. It sells on Amazon UK for £39. It supports HDR10, HDR10+ and HLG, easy to use menu system. 4K streaming is a doddle for the Roku Express 4K. This video will show you how to setup the Roku Express 4K in a few minutes.  

7 Segment display project - Raspberry PI

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7 Segment display project -  Raspberry PI This project uses a chip with 4 by 7 Segment display and a decimal point. The unit is controlled via GPIO pins and is fairly easy to wire up using a breadboard. There are many 7 segment display chips available. KYX-5462BS, HS-3461A are a couple of examples. Code written in Python. KYX-5462BS, HS-3461A, Raspberry PI, Raspberry PI 4, 7 Segment display

Raspberry PI 4 project 74HC595 with 8 LEDS

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    Raspberry PI 4 project 74HC595 with 8 LEDS I have soldered the 74hc595 to a piece of vero board. I Also soldered the resistors and LEDs. I connect 3 signals to the raspberry pi GPIO signals, DATA (14), shift CLOCK (11) and the data latch (12). The outputs q0-q7 are wired to an LED via a 330𝛀 𝒓𝒆𝒔𝒊𝒔𝒕𝒐𝒓 python script # FXV300 This script reads GPU temp # and writes values to two TIL311 segment displays # PIN 2 LATCH DATA INPUT B 0010 # PIN 3 LATCH DATA INPUT A 0001 # PIN 5 LATCH STROBE INPUT _[ ]_ # PIN 12 LATCH DATA INPUT D 1000 # PIN 13 LATCH DATA INPUT C 0100 import RPi.GPIO as gpio import os import time import datetime # import binascii # this part sets up the GPIO pins as output # The first value is the GPIO pin label,and the comment is the physical pin value gpio.setwarnings(False) gpio.setmode(gpio.BCM) gpio.setup(11, gpio.OUT) # Pin 23 - Serial Data 74HC595 Pin 14 gpio.setup(12, gpio.OUT) # Pin 32 - Data Clock 74HC595 Pin 11 SHCP shift register clock input gpio.setup(

Using PI 4 GPIO signals to control a 74LS00 NAND Gate

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Raspberry PI project Using PI 4 GPIO signals to control a 74LS00 NAND Gate Simple little project showing how NAND gate integrated circuit works. The circuit is built on a breadboard which will be connected to a Raspberry PI 4 using GPIO signals. Control GPIO Pins. The code to control the circuit is written in python. you can substitute a 74ls08 which is a AND gate, the output will result be opposite to the NAND gate. This can also be demonstrated by doing a SCRATCH. I will upload a SCRATCH set via sites.google.com/view/fxv300tech/

Controlling 4N35 optocoupler using a GPIO signal from PI 4 or Arduino

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Controlling 4N35 optocoupler using a GPIO signal from PI 4 or Arduino Controlling 4N35 optocoupler using a GPIO signal from Raspberry PI 4 or Arduino or any similar device which has General Purpose Input Output facilities (GPIO). Simple python script can be adjust for timing.

set a static TCP/IP IP Address for a Raspberry PI

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If you want to set a static TCP/IP IP Address for a Raspberry PI 4 you can do this fairly easily. You either set it up manually using Linux commands via terminal or use the GUI provided by Raspberry Pi OS

Controlling 4N35 optocoupler using a GPIO signal

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Controlling 4N35 optocoupler using a GPIO signal from PI 4 or Arduino.  These mini projects will get you creating circuits and understanding how they work.