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DS18B20 Temperature sensor not recognized

Started Jun 23, 2017 0 Replies

Hi Gurus, I'm trying to hook up a ds18b20 temperature sensor (in fact a breakout board like this) to a old RPi (ver 1) model B, running DietPi. I am following this guide from…Continue

Drawing on 8x32 LED matrix with 74HC154

Started Jun 20, 2017 0 Replies

How do I send a pattern into an 8x32 LED matrix? I'm using the AT89S52 microcontroller with a 74HC154 4-16 line decoder, programming in C with the Keil IDE. I've done vertical scanning, but am…Continue

Tags: 74HC154

 

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yamadanao posted a discussion

DS18B20 Temperature sensor not recognized

Hi Gurus, I'm trying to hook up a ds18b20 temperature sensor (in fact a breakout board like this) to a old RPi (ver 1) model B, running DietPi. I am following this guide from Adafruit. The '/sys/bus/w1/devices' directory always seems to be empty.Here is the date sheet of ds18b20 :…See More
Jun 23, 2017
yamadanao posted a discussion

Drawing on 8x32 LED matrix with 74HC154

How do I send a pattern into an 8x32 LED matrix? I'm using the AT89S52 microcontroller with a 74HC154 4-16 line decoder, programming in C with the Keil IDE. I've done vertical scanning, but am stumped at the next step. I will include the schematic if needed. The circuit is the same with the one I include below only I don't use 74HC138, common anode matrix and I use UN2803 as a driver, I'm not using the memoryThis is the date sheet of 74HC154 :…See More
Jun 20, 2017

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