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# of kits being made:
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Qty Per KitAddl % for sparesTotal # OrderedSpares availableOn Hand?Supplier (Run 1, early 2021)Link (Run 1)Supplier (Run 2, July 2021Link (Run 2)BrandNotes
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1ATmega32A 40 pin DIP (32L works too)Smurg20%305YesDigi-Keyhttps://www.digikey.com/product-detail/en/ATMEGA32A-PU/ATMEGA32A-PU-ND/1914592?itemSeq=366373892Digi-Key"
Microchip Technology
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140 pin DIP socketSmurg10%283YesDigi-Keyhttps://www.digikey.com/product-detail/en/DILB40P-223TLF/609-4716-ND/4292073?itemSeq=366374211Digi-Key"Amphenol
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2x3 pin header 2.54mm (for ISP flashing) - black socket
Smurg10%283YesDigi-Keyhttps://www.digikey.com/en/products/detail/61200621721/732-5404-ND/4846914?itemSeq=366876882Digi-Key"
Würth Elektronik
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1JST PH 2mm 4pin connector - white socketSmurg10%283YesNewarkhttps://www.newark.com/jst-japan-solderless-terminals/s4b-ph-k-s-lf-sn/connector-header-2mm-4-position/dp/38K8074eBayJSTJST charges an arm and a leg for pre-assembled cables for mating to these connectors, so I am sourcing the cables from Amazon from a third-party. They fit - tightly! Not easy to unplug.
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1... + JST cable for aboveSmurg10%283YesAmazonhttps://www.amazon.com/gp/product/B01DUC1S7S/ref=ox_sc_act_title_5?smid=A3G4BHAI7BWOKN&psc=1[Parts on hand]n/adaier
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1USB breakout PCBSmurg10%283YesAmazonhttps://www.amazon.com/gp/product/B07B5ZDLJY/ref=ox_sc_act_title_4?smid=A28JUS3SJ1A0RV&psc=1Same"DIYMallMost such boards (including Adafruit's here) seem too large to fit in the space provided. These are small and resemble the ones from the photo on Elmo's git repository.
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1500 mA polyfuseSmurg10%283YesDigi-Keyhttps://www.digikey.com/en/products/detail/littelfuse-inc/60R050XU/253198Arrow
https://www.arrow.com/en/products/60r050xu/littelfuse?utm_campaign=octopart_2020&utm_currency=USD&utm_keyword=60R050XU&utm_medium=aggregator&utm_content=inv_listing&region=nac&utm_source=octopart
Littelfuse
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26mm momentary push buttonsSmurg10%555YesAmazonhttps://www.amazon.com/gp/product/B07VSNN9S2/ref=ox_sc_act_title_3?smid=AJJYA8M5YMCKV&psc=1[Parts on hand]n/aQTEATAKAll such pushbuttons seem to have rather "chunky" leads. I hope the holes on the boards can accommodate them.
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116 MHz quartz crystalSmurg10%283YesDigi-KeyDigi-Key
https://www.digikey.com/en/products/detail/AS-16.000-18/2151-AS-16.000-18-ND/10271769?utm_campaign=buynow&utm_medium=aggregator&curr=usd&utm_source=octopart
RaltronLoad capacitance is 18 pF, which I hope is a good match to the 22 pF capacitors. I followed the formula from this adafruit blog, which suggested 16 pF; 18 pF was as close as I could get.
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5mm LED (for the lock indicators) - BLUE option
Smurg10%838YesAmazonhttps://www.amazon.com/gp/product/B01GE4WEGI/ref=ox_sc_act_title_2?smid=A353AQG9I0DZD6&psc=1[Parts on hand]n/aCO RODEI am choosing diffused LEDs so the light will already be diffused before entering the diffuser windows in the keyboard. This should hopefully look nice and even and avoid glare from the relatively bright blue and white LEDs. If you want old-skool green LEDs (or red or orange), they are readily available ;-)
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3...WHITE optionSmurg10%838YesAmazonhttps://www.amazon.com/gp/product/B01GE4WJ0Y/ref=ox_sc_act_title_1?smid=A353AQG9I0DZD6&psc=1[Parts on hand]n/aCO RODEditto
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105universal switching diode (DO-35 1N4148)Smurg20%3150400YesDigi-Keyhttps://www.digikey.com/product-detail/en/1N4148/1N4148FS-ND/458603?itemSeq=366391693Digi-Key"
ON Semiconductor
Will be including 5 spare with every kit order.
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23.6 V zener diode (DO-35 BZX55C3V6)Tink10%555YesDigi-Keyhttps://www.digikey.com/ordering/shoppingcart?qty=55&cref=&enterprise=0&part=BZX55C3V6-TRGICT-ND&partid=9600594&source=search&lang=en[Parts on hand]n/a
Vishay General Semiconductor
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14.7 uF electrolytic capacitorTink10%283YesNewarkhttps://www.newark.com/panasonic/eca-1hm4r7i/aluminum-electrolytic-capacitor/dp/48W7730?CMP=AFC-OP""Panasonic
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2100 nF ceramic disk capacitorTink10%555YesDigi-Keyhttps://www.digikey.com/en/products/detail/C315C104M5U5TA/399-4151-ND/817927?utm_campaign=buynow&utm_medium=aggregator&curr=usd&utm_source=octopartDigi-Key"Kemet0.1 uF == 100 nF
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222 pF ceramic disk capacitorTink10%555YesDigi-Keyhttps://www.digikey.com/product-detail/en/C317C220J2G5TA/399-4220-ND/817996?itemSeq=366383291Digi-Key"Kemet
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110 kΩ resistorTink10%283YesNewarkhttps://www.newark.com/multicomp/mf25-10k/through-hole-metal-film-resistor/dp/38K5271?CMP=AFC-OP""MulticompPer elmo, wattage doesn't matter here; elmo suggested these 1/4 watt units.
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268 Ω resistorTink10%555YesNewarkhttps://www.newark.com/multicomp/mf25-68r/through-hole-metal-film-resistor/dp/38K5373?CMP=AFC-OP""Multicompditto
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41.5 kΩ resistorTink10%11010YesNewarkhttps://www.newark.com/multicomp/mf25-1k5/through-hole-metal-film-resistor/dp/38K5292?CMP=AFC-OPDigi-Key
https://www.digikey.com/en/products/detail/stackpole-electronics-inc/RNMF14FTC1K50/2617305
Multicomp (first order), Stackpole (second)
ditto
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