Here's how my pedal looks now (you can see the cool blue LED light indicating pairing status!). You can also buy commercial options from PageFlip or AirTurn, but I found these difficult to source in the UK.
Opensong tutorial full#
Total cost of building a full bells and whistles pedal from scratch = £43.50 Total cost of building a basic pedal with minimum options from scratch = £36.50 Total cost of full bells and whistles pedal modification (what I've done below) = £28.50 Total cost of modifying a pedal with minimum options = £21.50 Should be free if you know someone with a car!
Opensong tutorial Bluetooth#
Scrap bit of foam (I cut a bit off a car sponge) to attach the Bluetooth controller to before glueing it to the metal case - this is to avoid electrical shorting. On/off power toggle switch to save your battery. You could just put the battery inside the enclosure/pedal, but this method saves you having to open up the pedal to replace the battery. They also make it look cool!īattery compartment (9V tray type). These are optional, but only cost about £1 total. These are to show the status of the pairing and button presses. Small push to make momentary button switch to allow for pairing to new devices. These cost about £2 for two, but completely optional. Stereo jack socket if you are replacing a wired pedal like mine to allow you to plug a cable back in if you want to still use it for its original purpose. I added two extra, although I've never used them, These cost about £2 for two, but completely optional Stuff you will need to make or convert your pedal (I assume you have a two button pedal like mine or have an enclosure with two switches as above).Īdafruit's Bluefruit EZ-Key Controller ( ) - costs about £20 including deliveryĮxtra mono jack sockets if you want to add extra pedal inputs to your pedal (you can have up to 12 buttons). Heat shrink tube or electrical tape, solder iron + solder Use this website to help you calculate the best resistor size to use depending on your input voltage and led voltage, however, most LEDs will cope with a resistor between 200 Ohms and 1k Ohms.Ĭomputer with USB to program the ESP32 board running the free Arduino IDE software. LED & resistor & mount from CPC in UK: LED, resistor, and mount or German LED, resistor, mount (about £1/€1) total. Alternatively you can use a battery or USB input on the ESP32 board for power.įemale-Female Dupont Wires / Jumper Wires from CPC (approx £1.80 / €2.00)
Thin metal enclosures are fine, but they can interfere with Bluetooth range.ĮSP32 WiFi/Bluetooth development board (approx £6/€8)ĭC Power Jack fitting your power supply (German shop MusikDing or UK alternative from CPC (approx £0.80 or €0.55). If you want to modify an old footswitch, this is free, otherwise you can purchase a blank Hammond project enclosure box and separate SPST switches.
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