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Počasí Hradec Králové - Slunečno.cz

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As the price of ICL7107 decreased dramatically through the time, I decided to use my stocks to build a modules for various purposes.

Therefore I designed the PCB, which is divided into two parts, but could be manufactured as one. The 2 parts are connected with right angle 25 pin header, which allows to use LED display vertically, while the driver is horizontally oriented.

Or you can use wires for connection between boards.

You can see ICL7107 Voltmeter Module PCB on the following pictures:

ICL7107 Voltmeter Module PCB - Top

ICL7107 Voltmeter Module PCB - Bottom

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I was looking for such scripts for long time, but with various results. Finally, I build following working scripts, which I am using for transfer files from PC to web server and back and for backup of various folders.

Script for setting permissions for web server without influencing *.sh files (scripts itself):

#! /bin/sh
sudo chmod 660 -R $(ls --ignore='*.sh')
sudo chown www-data:www-data -R $(ls --ignore='*.sh')

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It is a long time ago, when I got Willem EPROM programmer. As the time is going quickly, someone could see this programmer is obsolete already. But there is simple, but big advantage of this device - low level modification possibility!

One of the requirement at the moment is decreasing supply voltage of modern chips. Therefore it is important to have ability of modern programmer to fulfill datasheet specification.

LPT Logic Levels Converter PCB - Top

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The target of these designs is to provide the possibility of programming various chips by Willem EPROM Programmer and optionally test it's hardware functionality.

Willem Programmer Diagnostic Tool

Willeprog Diagnostic Tool PCB Top

Willem Programmer EPROM 16bit Adapter

Willeprog EPROM 16bit Adapter PCB Top

Willem Programmer PLCC44 Adapters

Willeprog DIL40 - PLCC44 Adapter PCB Top Willeprog PLCC44 Adapter PCB Top

Willem Programmer 28FXXX 29FXXX TSOP48 8/16 bit Adapter

Willeprog 28FXXX 29FXXX TSOP48 8/16 bit Adapter PCB Top

Willem Programmer 28FXXX 29FXXX/29LVXXX TSOP48 16 bit Adapter

Willeprog 28FXXX 29FXXX/29LVXXX TSOP48 16 bit Adapter PCB Top

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This design is rework of my monitor, published already in 2017. I decreased the size of sensor through creating a special PCB with all the components. In this way, I achieved approximately the same dimensions, but with just one PCB populated, i.e. hight of sensor is less.

Both designs signalize voltages of three cells in LiPol / LiIon / LiFePo battery by displaying them on JETIBOX LCD and beeping through JETI Tx module as well display vario and altitude data on screen.

I am using cheap pressure sensor BMP280 and internal analog digital convertor inside the processor for measuring voltages of LiXXX cells.

JETI LiXXX Vario with BMP280 PCB - Top

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