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From HP 41 to WP 34 S
02-08-2015, 02:41 AM (This post was last modified: 02-08-2015 02:48 AM by BarryMead.)
Post: #7
RE: From HP 41 to WP 34 S
(02-08-2015 02:24 AM)garfy Wrote:  thank you, interesting, i wonder if i am able to add this micro usb.
I have modified calculators using BOTH the micro-USB board method, and the 2.5mm headphone jack method and I find that the 2.5mm headphone jack method is much easier.

The cable is a standard FTDI USB to 3.5mm 3.3v headphone jack cable here with a standard 3.5mm female to 2.5mm male adapter here on the end of it and you only need to solder three wires.

With the Micro-USB board you need to solder at least 5 wires and remove two surface mount inductors.
Also the holes you cut into the case of your calculator are simpler with the 2.5mm headphone jack method
all you need is a small round jeweler's rat-tale file.

Take Care, Barry
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Messages In This Thread
From HP 41 to WP 34 S - garfy - 02-07-2015, 09:14 PM
RE: From HP 41 to WP 34 S - walter b - 02-07-2015, 10:40 PM
RE: From HP 41 to WP 34 S - BarryMead - 02-07-2015, 10:52 PM
RE: From HP 41 to WP 34 S - garfy - 02-08-2015, 12:48 AM
RE: From HP 41 to WP 34 S - BarryMead - 02-08-2015, 01:38 AM
RE: From HP 41 to WP 34 S - garfy - 02-08-2015, 02:24 AM
RE: From HP 41 to WP 34 S - BarryMead - 02-08-2015 02:41 AM
RE: From HP 41 to WP 34 S - walter b - 02-08-2015, 03:44 AM
RE: From HP 41 to WP 34 S - rprosperi - 02-08-2015, 02:47 PM
RE: From HP 41 to WP 34 S - garfy - 02-08-2015, 04:00 AM
RE: From HP 41 to WP 34 S - rprosperi - 02-08-2015, 03:06 PM
RE: From HP 41 to WP 34 S - garfy - 02-08-2015, 03:12 PM
RE: From HP 41 to WP 34 S - rprosperi - 02-08-2015, 03:37 PM
RE: From HP 41 to WP 34 S - garfy - 02-08-2015, 04:27 PM
RE: From HP 41 to WP 34 S - Dieter - 02-08-2015, 05:20 PM
RE: From HP 41 to WP 34 S - garfy - 02-09-2015, 10:54 AM
RE: From HP 41 to WP 34 S - rprosperi - 02-09-2015, 04:29 PM
RE: From HP 41 to WP 34 S - walter b - 02-09-2015, 05:18 PM
RE: From HP 41 to WP 34 S - BarryMead - 02-12-2015, 08:04 PM
RE: From HP 41 to WP 34 S - garfy - 02-14-2015, 12:15 AM
RE: From HP 41 to WP 34 S - garfy - 02-25-2015, 12:06 AM
RE: From HP 41 to WP 34 S - garfy - 02-25-2015, 12:09 AM
RE: From HP 41 to WP 34 S - garfy - 03-04-2015, 12:18 AM
RE: From HP 41 to WP 34 S - garfy - 03-04-2015, 12:20 AM
RE: From HP 41 to WP 34 S - garfy - 03-05-2015, 03:06 PM
RE: From HP 41 to WP 34 S - garfy - 03-06-2015, 12:12 AM
RE: From HP 41 to WP 34 S - BarryMead - 03-06-2015, 12:23 AM
RE: From HP 41 to WP 34 S - garfy - 03-06-2015, 12:17 AM
RE: From HP 41 to WP 34 S - garfy - 03-06-2015, 01:38 AM
RE: From HP 41 to WP 34 S - BarryMead - 03-06-2015, 03:01 AM
RE: From HP 41 to WP 34 S - rprosperi - 03-06-2015, 03:39 AM
RE: From HP 41 to WP 34 S - rprosperi - 03-06-2015, 01:13 PM
RE: From HP 41 to WP 34 S - garfy - 03-06-2015, 01:54 AM
RE: From HP 41 to WP 34 S - garfy - 03-06-2015, 11:02 AM
RE: From HP 41 to WP 34 S - garfy - 03-13-2015, 08:15 PM
RE: From HP 41 to WP 34 S - garfy - 03-13-2015, 08:47 PM



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