Penkesu Tiny Computer - M0YNG.uk

Modified 2022-02-19

I saw the Penkesu[1] tooted about recently, and I really like the idea. I've been tempted by tiny computers for a long time now, but I've not found one that was available, performant enough, etc. to really put the effort into getting. Plus I've also wanted to try making my own keyboard for a while, which is a key (ha!) part of this build. So, I've ordered some PCBs and I'm gathering resources here as I work towards building this tiny computer.

1: https://github.com/penk/penkesu

It's based on a Raspberry Pi Zero 2 W, but I suspect it could use almost any small enough Single Board Computer, although I suspect a 4 wouldn't last long on battery power!

Marvel at this glamour shot from the originator's (penk) github!

A tiny computer, the display is showing the Matrix waterfall and is slightly smaller than the keyboard. It clearly folds like a clam [IMG]

A friend is letting me "babysit" their 3d printer, otherwise getting this case made would be a right pain.

2: https://github.com/penk/penkesu#bill-of-materials

Bill of materials[2]

Plus some other bits mentioned in the build guide...

**Note:** These are all sourced from the UK by preference, as that's where I am.

Display

Waveshare 7.9inch Capacitive Touch Screen[3] £68 🛖

Right Angle adapter HDMI[4] £5.70 🛖

Mini HDMI adapter[5] £5.70 🛖

20cm Ribbon Cable[6] £1.70 - Out of stock 🛖

3: https://thepihut.com/products/7-9-ips-capacitive-touchscreen-400x1280?variant=40071050002627

4: https://thepihut.com/products/diy-hdmi-cable-parts-right-angle-l-bend-mini-hdmi-plug?variant=39600035025

5: https://thepihut.com/products/diy-hdmi-cable-parts-straight-mini-hdmi-plug-adapter?variant=39600034769

6: https://thepihut.com/products/diy-usb-or-hdmi-cable-parts-20-cm-ribbon-cable

Case

Gameboy Advance SP Hinges[7] £3.67 🏪

M2 Inserts[8] £4.50 🏪

M2 bolts[9] £2.52 🏪

7: https://www.ebay.co.uk/itm/332603421787

8: https://www.ebay.co.uk/itm/264077564676

9: https://www.ebay.co.uk/itm/321231104609

Electronics

Raspberry Pi Zero 2 W[10] £13.50 - Out of stock 🛖

Some power manager * Adafruit PowerBoost 1000C[11] £17.40 🛖 (suggested) * LipoPiZero+ Low-Profile Mobile Power pHAT[12] £24 🛖 (has Real Time Clock and voltage monitor and can initiate soft shutdown)

Battery * 2000mAh Li-Po battery[13] £13.50 🏴‍☠️ * 4500mAh 606090[14] £18 A * Lithium LED Safety Vest (BigClive Video)[15] £6 for 3×2000mAh (plus some other stuff)

MicroSD Card * £22 128gb sandisk extreme[16] 🏪 * £20.50 SanDisk Endurance[17] 🏪

Micro USB plug thing[18] £2.44 🏪

A toggle switch of some sort if using the PowerBoost, a button if using the LipoPiZero+

Probably a micro USB -> USB Hub thing if you also want touch screen to work?

10: https://thepihut.com/products/raspberry-pi-zero-2

11: https://thepihut.com/products/adafruit-powerboost-1000-charger-rechargeable-5v-lipo-usb-boost-1a

12: https://thepihut.com/products/lipopizero-low-profile-mobile-power-phat

13: https://shop.pimoroni.com/products/lipo-battery-pack?variant=20429082247

14: https://www.amazon.co.uk/Polymer-Lithium-Rechargeable-External-Battery-1Pcs-1pcs/dp/B098114LPS

15: https://yewtu.be/watch?v=SgPw1Ig2jYQ

16: https://www.ebay.co.uk/itm/265313505124

17: https://www.ebay.co.uk/itm/373399145411

18: https://www.ebay.co.uk/itm/393632109420

Keyboard

PCB £2.50

1N4148 Diode x 48[19] £2 ⌨️

Arduino Pro Micro[20] £7.50 ⌨️ * You might also want to socket the controller e.g. this £2.50 micro socket[21] ⌨️

Kailh Low Profile Choc v1 Switches x 48[22] £30 ⌨️

Key Caps (can't find those specified) * Work Louder Choc Low Profile Keycaps x 48[23] £75 ⌨️ * Work Louder Choc Low Profile with legend[24] £70 ⌨️ (I went with these)

19: https://mechboards.co.uk/products/throughhole-diodes

20: https://mechboards.co.uk/products/pro-micro-5v

21: https://mechboards.co.uk/products/24-pin-pro-micro-sockets

22: https://mechboards.co.uk/products/kailh-low-profile-choc-switches-v1-brown?variant=40330408198349

23: https://mechboards.co.uk/products/work-louder-choc-keycaps-dime-set

24: https://mechboards.co.uk/products/work-louder-choc-keycaps-daily-set