Tag: electronics

Sinclair, Acorn and the ARM

Posted by lazlo – June 29, 2013

lzoDSO – prototype demo

Posted by lazlo – May 15, 2013

Demonstrates the (currently limited) capabilities of the lazlo labs digital storage oscilloscope (lzoDSO) prototype. The test probe of the scope is connected to a timer circuit in mono-stable astable configuration so that it produces a more or less defined test signal. There is also a test signal source inside the scope that we need integrate into the firmare to get it working.

Uses an ATmega644 at 16 MHz and the internal 10-bit A/D converter (only using 8 bits).

See the lzoDSO project page for more at labs.lazlo.de/trac/lzodso.

lzoDSO – finished prototype board assembly

Posted by lazlo – May 14, 2013

P1070973_modified_medium-1024x768_modified

Yesterday I finished the assembly of the new front panel controller board, which evolved out of the old display carrier board). The circuit signal lines have  already been tested (using continuity testing) and I’m not far away from having the prototype be contained inside its case.

In the new board I basically merged the core board with the display carrier board, since there was enough space available. A slight change I introduced is that I adjusted some pin mappings (namely we moved the LCD control lines from port B to D).

Schematic and Circuit Board

PDF files for schematic and board.

schematic board

Now I’m updating the wiki page of the prototypes to get things in sync again.

Hand Soldering Techniques – Surface Mount

Posted by lazlo – April 3, 2013