Mercurial > ~darius > hgwebdir.cgi > iec1107

annotate hw/README @ 12:b4de1b6f8f78

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add note about nice looking circuit.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 25 Nov 2013 23:43:33 +1030
parents 8031548a5d48
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
7
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
1 The schematic is designed using TinyCAD
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
2 http://sourceforge.net/projects/tinycad/
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
3
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
4 The stripboard was laid out using VeeCAD
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
5 http://veecad.com/
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
6
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
7 It is loosly based on an Elektor circuit
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
8 http://www.elektor.com/magazines/2002/march/iec1107-electricity-meter-interface.55617.lynkx
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
9
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
10 The photodiode is an OSRAM BP104, the IR LED a generic IR LED from Jaycar
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
11 (ZD1947) with a spectral peak of 940nm. The opamp is an LM348 clone (ZL3348 from Jaycar).
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
12
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
13 The 6 pin interface is a TinyOS FTDI breakout
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
14 http://www.tinyosshop.com/index.php?route=product/product&product_id=186
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
15
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
16 Mine is running at 5V but it works at 3.3V.
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
17
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
18 I needed to use the FTDI EEPROM tool to invert the TX & RX sense using FT_Prog from
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
19 http://www.ftdichip.com/Support/Utilities.htm
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
20
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
21 The need to invert could be rectified by modifying the circuit, but modifying the
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
22 EEPROM was a lot easier than changing the circuit.
8031548a5d48 Add some hardware notes.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
23
12
b4de1b6f8f78 Add note about nice looking circuit.
Daniel O'Connor <darius@dons.net.au>
parents: 7
diff changeset
24 Hardware like this looks better
b4de1b6f8f78 Add note about nice looking circuit.
Daniel O'Connor <darius@dons.net.au>
parents: 7
diff changeset
25 http://wiki.volkszaehler.org/hardware/controllers/ir-schreib-lesekopf-usb-ausgang
b4de1b6f8f78 Add note about nice looking circuit.
Daniel O'Connor <darius@dons.net.au>
parents: 7
diff changeset
26