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spiffchorder:hardware [2011/06/15 15:34] – chidespiffchorder:hardware [2023/02/09 23:32] (current) – external edit 127.0.0.1
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 {{spiffchorder:chorder.png?500|SpiffChorder hardware schematics (click for larger version)}} {{spiffchorder:chorder.png?500|SpiffChorder hardware schematics (click for larger version)}}
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 |R8-R18|Optional pull-up resistors. 10 kOhm or 4.7 kOhm.|4610X-1-103LF-ND| |R8-R18|Optional pull-up resistors. 10 kOhm or 4.7 kOhm.|4610X-1-103LF-ND|
 |X1|12.000 MHz crystal.|XC1380-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) ===== ===== 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: 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 a short experiment it seems that it is the same for any Conrad site after you **omit the '- 89' suffix**.+   * 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)).    * 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)).
  
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 |D1, D2|3.6V zener-diode.|180050 - 89| |D1, D2|3.6V zener-diode.|180050 - 89|
 |IC1|Atmel ATmega168 (Warning: TQFP).|154885 - 89| |IC1|Atmel ATmega168 (Warning: TQFP).|154885 - 89|
-|   |28 pin socket for IC1|189515 - 89|+|   |<del>28 pin socket for IC1</del>((useless with TQFP package))|<del>189515 - 89</del>|
 |R1|2.2 kOhm resistor.|405299 - 89| |R1|2.2 kOhm resistor.|405299 - 89|
 |R2|4.7 kOhm resistor.|405337 - 89| |R2|4.7 kOhm resistor.|405337 - 89|