Differences

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--- spiffchorder:hardware [2009/07/22 02:59] – priestdo
+++ spiffchorder:hardware [2023/02/09 23:32] (current) – external edit 127.0.0.1
@@ Line 11: / Line 11: @@
-===== Bill of Materials =====
+===== Bill of Materials (Digikey) =====
 Below is a list of the components needed to build the SpiffChorder.
@@ Line 32: / Line 34: @@
 |R8-R18|Optional pull-up resistors. 10 kOhm or 4.7 kOhm.|4610X-1-103LF-ND|
 |X1|12.000 MHz crystal.|XC1380-ND|
-|  |key switches|CH196-ND ((I have used the Cherry MX series for years, see http://www.cherrycorp.com/english/switches/key/pdf/keyswitch_cat.pdf))|
+|  |key switches|CH196-ND or CH198-ND((I have used the Cherry MX series for years, see http://www.cherrycorp.com/english/switches/key/pdf/keyswitch_cat.pdf))|
+|  |key caps at [[http://www.wasdkeyboards.com/index.php/products/blank-keycap-singles.html|WASD Keyboards]]((Thanks to Kevin Wang for telling me about WASD))|Not available from digikey  |
+===== Bill of Materials (Conrad) =====
+For residents in Europe, European based Conrad may be a better choice than the US based Digikey. This will save, in most countries (?) quite some shipping costs (and the environmental damage that goes with shipping over long distances). Some important remarks:
+   * The following list is based on an order placed with the **Dutch site** of Conrad, but after a short (and thus inconclusive) experiment it seems that it is the same for any Conrad site after you **omit the '- 89' suffix**.
+   * WARNING: the Atmel ATmega168 controller is only available in the tiny TQFP (and not DIP) format from Conrad, this requires a steady hand during soldering, and an adapter if you want to mount it on a universal PCB ((on youtube there are some fine instruction video's of how to do it)).
+^reference^description^Conrad part number^
+|C1, C2|18pF ceramic capacitor.|457159 - 89|
+|C3, C5|100nF ceramic capacitor (decoupling).|453099 - 89|
+|C4|10uF electrolytic capacitor, min. 11V.|468231 - 89|
+|CON1|2x3 pin header, e.g. shrouded header from Harting.|
+|CON2|USB connector, alternatively cable with type-A plug.|
+|CON3|Connection to switches. Can be wired directly.|
+|CON4|Connection to LEDs. Optional.|
+|D1, D2|3.6V zener-diode.|180050 - 89|
+|IC1|Atmel ATmega168 (Warning: TQFP).|154885 - 89|
+|   |<del>28 pin socket for IC1</del>((useless with TQFP package))|<del>189515 - 89</del>|
+|R1|2.2 kOhm resistor.|405299 - 89|
+|R2|4.7 kOhm resistor.|405337 - 89|
+|R3, R4|82 Ohm resistor.|405124 - 89|
+|R5-R7|LED current limiting resistors. About 1 kOhm, depending on selected LEDs.|
+|R8-R18|Optional pull-up resistors. 10 kOhm or 4.7 kOhm.|to be added|
+|X1|12.000 MHz crystal.|155256 - 89|
+|  |key switches|706892 - 89|
+|  |key caps|707023-89|