pancakelizard

pi zero video display foot controller for band gigs

Posted on October 10, 2018

I do visual projections for a local band, and whilst some of the gig involves mixing and skipping around video parts in time to the music, a lot of it is just hitting play at a certain time, and doing a crossfade from the band logo screen.. i don't want to make myself redundant, but it felt like a fun project to have a self-contained box that does all of this without having to have a laptop and cables all over the shop. just a stomp box onstage that plugs straight into the projector that can be easily set up beforehand by dropping files onto a network share.

basically a posh powerpoint controller that a singer can stamp on, instead of holding a controller hooked up to a laptop.

after chatting to a few guitar pedal geeks, i looked at making my own, but the Digitech FS3X Foot Controller was only £21 and looks like it meets my needs perfectly - a nice angled metal box with three buttons on.

 

so i've gone and ordered:

pimoroni:
Raspberry Pi Zero WH (pre-soldered header)
https://shop.pimoroni.com/products/raspberry-pi-zero-wh-with-pre-soldered-header
£14.22

amazon:
Digitech FS3X Foot Controller
https://amzn.to/2CEkev0
£21

ebay:

1080P Mini HDMI Male to HDMI V 1.4 Female Adapter Panel Mount Extension Cable
https://www.ebay.co.uk/itm/1080P-Mini-HDMI-Male-to-HDMI-V-1-4-Female-Adapter-Panel-Mount-Extension-Cable/401399059115?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
£2.29

30/50cm Micro USB Male to Female Mount Panel Extension Adapter
https://www.ebay.co.uk/itm/30-50cm-Micro-USB-Male-to-Female-Mount-Panel-Extension-Adapter-Cable-2x-Screw/113072582562?ssPageName=STRK%3AMEBIDX%3AIT&var=413416634228&_trksid=p2057872.m2749.l2649
£1.04

1080P HDMI Male To VGA D-SUB 15 Pins Female Video AV Adapter Cable For PC HDTV
https://www.ebay.co.uk/itm/1080P-HDMI-Male-To-VGA-D-SUB-15-Pins-Female-Video-AV-Adapter-Cable-For-PC-HDTV/283164851364?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
£1.47

2.4GHz IPEX IPX Antenna - Extension cable, 3DBI Gain Antenna
https://www.ebay.co.uk/itm/ESP-12-ESP8266-WeMos-D1-Mini-WIFI-Development-Board-3dBI-2-4G-SMA-Antenna-ESP12/272988693907?ssPageName=STRK%3AMEBIDX%3AIT&var=572207564146&_trksid=p2057872.m2749.l2649
£0.99

foot pedal aluminium coloured button covers x3
https://www.ebay.co.uk/itm/4553-Guitar-Foot-Nail-Cap-Effect-Pedal-Pad-Cover-Aluminum-Protector-Accessories/273492670855?ssPageName=STRK%3AMEBIDX%3AIT&var=572883887805&_trksid=p2057872.m2749.l2649
£3.68

total £44.69

extras:

micro sd card (8gb should be enough. possibly less?)
micro usb PSU (i have an old 2A USB phone charger lying around already)
wire to (re)connect pedal buttons to pi breakout board
soldering iron/solder
dremel (would a laser cutter be better/neater?)
possibly a drill and some metal bits

configuration, thoughts and other bits i've not actually done yet.....

foot controller config:
button 1 - home (display static logo)
button 2 - down
button 3 - up

  • pi - command line install of raspbian
  • wifi network - connect to preconfigured networks via DHCP (or set up as wifi hotspot? or auto-connect to preconfigured phone tethering wifi for at-gig updates?)
  • due to it being a metal box, i thought an external antenna might be a good idea - so taking this page into accoutn
    Adding an External Antenna to the Raspberry Pi Zero W
    i ordered an external unit and wire/screw thread. THIS MAY NOT BE NEEDED.
  • SMB share pointing at "videos" drop folder - or even sync to a dropbox folder?
  • after power up, unit displays "home" screen, then cycles through 1.mp4 2.mp4 3.mp4 4.mp4 (etc) via button control - when it gets to the last one, it cycles back to 1.mp4
  • use omxplayer for vid playback? - https://www.raspberrypi.org/documentation/raspbian/applications/omxplayer.md
  • wiring/how to trigger/setup?
  • mounting the pi inside the case - hot glue gun?

so, the pi and foot controller should arrive in the next day or two. i should be able to work out if the box is suitable to mount everything in (and if it isnt, send it back and go for the generic metal box/custom route)

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A few of today’s vinyl choices….

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Pub number 6 (we skipped two on the way here for some reason!)

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sourdough onion bagel recipe

Posted on March 7, 2018

baking using a sourdough starter? I've had mine a few years now, but its still only just starting to develop its flavour... give it a few more years, and im sure it'll be great!


anyway. i thought i'd start a post to document my attempts at baking. today i made onion bagels. i think i cracked it on my first ever attempt!

since sainsburys stopped making their fresh ones, i've not found anywhere locally to get a good fresh one. the other supermarket ones are all pretty crap to be honest. none even come close. so during a quiet day WFH, i decided to have a crack at doing them myself, culled from a few recipes i'd seen on the interwebs.

dry ingredients:

  • 600g flour (i used strong white bread flour)
  • 1 packet (7g?) instant dried yeast
  • 12g salt (i used smoked sea salt)
  • onion powder - i put quite a bit in, as the lid flew off my tub. probably in the region of 5+ tbsp
  • dried onion (i used the crispy fried onions you find in big bags in indian supermarkets or down the tesco ethnic aisle, but i may try fresh as some point)

wet ingredients:

  • 2-3tbsp honey
  • 1 egg white (save the yolk for brushing)
  • ~250ml warm water (tepid. not hot)
  • 300g sourdough starter

other stuff needed:

  • bicarbonate of soda (for boiling)
  • sesame seeds (for topping)
  • fine semolina (for the base to stop them sticking to the pan)

in a large mixing bowl (or your kitchenaid!) mix dry ingredients, then add the wet stuff to the bowl, mix until you get a big lump of dough, then tip it out and start kneading - i did it for about 5 minutes, maybe a bit longer. roll into a ball, and stick bag into the (lightly floured) mixing bowl. cover with clingfilm or a damp clean teatowel and put somewhere warm for a bit (i heat my combi microwave on convection mode for a few mins then stick it inside) - leave for about an hour.

portion off into ~150g chunks of dough (or 100g if you want them a bit smaller) - should be enough for 8-10. knead then roll each ball a bit more, and leave to prove for a bit longer - at this point i took half the dough, put it back in the bowl, covered it and stuck it in the fridge for a day or two and made four large balls with the other half

after another half hour or so they had risen some more:

poke a hole in the middle with your thumb, and run it around a couple of fingers to get a nice donut shape.

boil a full kettle (or large pan of water) to get ready to boil the bagels. add the bicarb and bring back to the boil. drop them in one by one. depending on the size of your pan, do no more than 3/4 at a time - as i was doing 4, i did them two at a time...

after a minute, flip them over with a chopstick or something and boile for another minute...

place them on a baking tray with a generous layer of semolina dusted on...

top with whatever you want. i had sesame seeds to hand so used those. you don't have to put anything on if you don't want to. i used the egg yolk as a glaze too, but milk will probably do the same job. whether or not this is essential, i'm not sure.

bake at gas mark 4 for 25 minutes. turning the pan 180 degrees halfway in if you don't have a convection oven

leave to cool on a wire rack. when cooled a little, slice...

to me, this is pretty much the exact same consistency as the sainsburys ones (chewy, not dry and bread like)

fresh (still warm) with a bit of margerine


toasted with margerine...

i cant believe i managed to crack it on my first attempt! 🙂

 

*update*

just as good when cold and untoasted! ham, lettuce, cherry tomato and spring onion with salad cream...

One of the most intensely coloured rainbows I’ve ever seen

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