<div dir="ltr">Since you mentioned you bought a USB based Logic analyzer, I thought I'd
mention the open-source approach.<br>I was searching for years for a
low-cost Logic Analyzer until I found this (i.e. something I can pay for
a hobby without feeling I'm wasting too much money).<br>
<br>The Open Logic Sniffer is a fully open source Logic analyzer, with
up to ~100MHz sample rate, and up to 32 bit inputs.<br>It is USB based,
and has full source code for everything from the schematics, PCB layout,
PIC firmware and the VHDL source code for the Xilinx FPGA (Spartan 3E
250), and the multiple clients available.<br>
The cost is ~$45 including shipping to Israel here:<br><a href="http://www.seeedstudio.com/depot/bus-pirate-v3-assembled-p-609.html?cPath=61_68" target="_blank">http://www.seeedstudio.com/depot/bus-pirate-v3-assembled-p-609.html?cPath=61_68</a><br>
<br><a href="http://dangerousprototypes.com/open-logic-sniffer/" target="_blank">http://dangerousprototypes.com/open-logic-sniffer/</a><br><a href="http://www.gadgetfactory.net/gf/project/butterflylogic/" target="_blank">http://www.gadgetfactory.net/gf/project/butterflylogic/</a><br>
<br>Another companion product is the Bus Pirate, a low speed, low cost
USB based tool for hacking serial buses (I2C, SPI, JTAG, etc.). It can
also be used to program AVR, PIC microcontrollers. Like the Open Logic
sniffer, the Bus Pirate is also full open source.<br>
The Bus pirate is an essential tool in case you manage to erase the PIC
bootloader on the Open Logic sniffer.<br>
<br>This one costs ~$27 also from Seeed:<br>
<a href="http://www.seeedstudio.com/depot/preorder-open-workbench-logic-sniffer-p-612.html?cPath=75" target="_blank">http://www.seeedstudio.com/depot/preorder-open-workbench-logic-sniffer-p-612.html?cPath=75</a><br>
<br><a href="http://dangerousprototypes.com/docs/Bus_Pirate" target="_blank">http://dangerousprototypes.com/docs/Bus_Pirate</a><br><br>Generally
speaking, SeeedStudio combines the open source spirit with the low
manufacturing costs at china, low price margins, and very low airmail
shipping costs.<br>
<br>Udi<br><br><div class="gmail_quote">2010/7/13 Shachar Shemesh <span dir="ltr"><<a href="mailto:shachar@shemesh.biz">shachar@shemesh.biz</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr" bgcolor="#ffffff" text="#000000">
Hi list,<br>
<br>
I bought a USB connected logic analyzer for too much money (not that
much). When buying, I did a mistake and not thought through the issues,
and bought from a US supplier without telling them this needs to be a
220V country. As a result, I got an external power supply that is 110V,
which outputs 12V AC at 1000mA (why they do not write "1A", I do not
know).<br>
<br>
To my shame, I actually bought a universal DC supply without noticing
that it's AC I need, and started a support call with the company. They
were very nice, and when we, finally, found out the source (I hope it
is it), the guy said I could probably get by with 18VDC, but it would
strain the capacitors (my math suggests that 15VDC is closer to the
mark).<br>
<br>
So, does anyone know where I can get a 12V AC power supply? They are
not exactly a commodity.<br>
<br>
Thanks,<br>
Shachar<br>
<pre cols="72">--
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
<a href="http://www.lingnu.com" target="_blank">http://www.lingnu.com</a>
</pre>
</div>
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