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Nokia 5110 Display - Temperature

Nokia 5110 Display - Temperature

Bank of Eleven x DS-18B20 Temperature Sensors

Bank of Eleven x DS-18B20 Temperature Sensors

Temperature Controlled Computer Closet

Early in the month, I managed to read my first DS-18B20 temperature sensor.  Over the intervening few weeks, I have been experimenting with using a Python script to read up to ten sensors at a time, and storing the temperatures in a MySQL DB.  Here is a close up of a bank of 11 x DS-18B20 temperature sensors.

Bank of Eleven x DS-18B20 Temperature Sensors

It will also display one of the temperatures onto a Nokia 5110 LCD screen.  You can see the bank of 13 x sensors off to the right hand side:

Z280 Chip

Z280 Chip

Quick slightly off-set photo of the top of the Z280 chip

Z280 Board Bottom View

Z280 Board Bottom View

Z280 test board - bottom view of the hand soldered wiring

Z280 Top Side

Z280 Top Side

Side view of the top of the Z280 test board

Z280 Technical Manual

Z280 Technical Manual

Front cover of the Z280 Technical Manual - November 1989

Converting an PC AT Style Power Supply Unit

Back in 2005 July when I was working on testing a lot of my SWASC boat parts I thought it would be handy in having a +5V and +12V DC Bench-top Power Supply Unit (PSU) handy.  After a bit of hunting around online, I found that I just had to put a load on one of the PSU pins, and it would stay powered up, without a load.

Here are a few notes on how I went about this.

Parts used:

Completed PC PSU Conversion

Completed PC PSU Conversion

An Acer PC PSU converted to a bench 5V & 12V power supply

Using a Raspberry Pi to Read A DS-18B20 Temperature Sensor

There are a number of ways to read a 1-wire DS-18B20 temperature sensor via a Raspberry Pi.  As of December 2012, the Wheezy OS contains a kernel loadable module that allows you to directly read them.  At the moment, I won't go into how to do this, as you can read some other peoples in-depth web pages on how they have done this:

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