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^ D'accord, mais je ne suis pas francophone non plus...

Non-native English speaker: large rectangular tin box such as the ones that come with some Danish cookies Native speaker : cookie tin 😕

The package doesn't need to be physically with customs to be cleared. They can clear it as soon as they receive the electronic shipping documents from the sender.

If you want really good shielding, consider putting the breadboard in a large rectangular tin box such as the ones that come with some Danish cookies etc. You could easily mount some I/O jacks to the box itself. You can even put the lid on when you need full shielding.

You can etch your own PCBs and there are no tariffs :LOL: Back to the old ways.

If the cap is not directly (zero ohm) across the power rail, but wired through a resistor, FET etc, don't worry about it. BTW you don't need a lot of capacitance across the output of a DC-DC, since they operate at high frequency.

Littelfuse or Coto Technology. You'll find them on Mouser, Digikey etc. I wouldn't trust any electronic component from Amazon or any other site that doesn't specify the manufacturer and part number, with a datasheet available. NC reeds are extremely uncommon. I think you'd be better off...

This switch style ought to be jerry-riggable into a self contained low profile reed switch contraption. A little PCB with a reed on it instead of the original body, some plunger with a magnet inside, reuse the X (or rather Y) clips for fastening, and behold! A new pedal part is born. I've been...

I wonder how this last one installs in a pedal. Looks like it needs a huge hole for the plastic piece, but allows LED lighting. Intriguing...

I bought mine from the link I posted above (Banzai Music in Germany). They're about 2 Euros a pop and shipping to Canada is around 9 Euros. I didn't find that expensive at all, but I did buy a couple dozen, so shipping became negligible.

Get an actuator as below, add a tiny magnet to the plunger, and put a NC reed switch underneath: https://www.banzaimusic.com/Switch-Actuator.html I posted a thread some time ago about making low profile footswitches, you might want to find it and take a look. EDIT: here's the old thread i was...

^ yup, quiescent current can be an issue. I found out the hard way that an LM7805 can easily draw 3mA by itself with no load, which is huge for battery-powered stuff. If you're really trying to save power, you probably want to consider a switching regulator, not linear. But switchers tend to...

For extra confusion, KiCad places pots by default with pin 3 down. Those... bastards!

Some voltage regulators are lower noise than others. It's one of the parameters to look for in the datasheet if the noise level is important. Zener are easy enough to denoise with a parallel elcap. In any case, if this is about a PT2399 circuit, I won't worry about it. The chip itself has lots...

A lower dropout won't make it any more efficient. It will just insure it can still put out the rated voltage when the input voltage is not much above that. Say, 6V at input and you want 5V out. A 7805 will struggle to maintain 5V in this case, but an LDO will be fine. When you go down from 9V to...

PT2399 max current draw is about 40mA. If there was no Zener and you have a 9V supply, you'd have to drop 4V across the series resistor to supply 5V to the PT2399. R=V/I, so R = 4/0.04, or 100 Ohms. I'd go a bit lower, maybe 82 ohms, to have a bit of a margin if the 9V supply dips a bit. Use a...

Cap right across the Zener. And make sure you correctly size the series resistor before the Zener.

A zener should work fine. Bypass it with a cap though, maybe 100uF or so, to get rid of the noise. Zeners are great white noise generators.

It's OK to use Vref as signal ground, even in a more complex circuit with multiple Vref nodes, if it's properly buffered by an op amp or dedicated rail splitter IC. In one of my most complex circuits I couldn't make up my mind if I should use Vref or the negative rail as ground for a group of 3...

Here are my favorite low power op amps for guitar stuff, from lowest noise to lowest power (and price): OPAx205 OPAx196 OPAx990 The last one works fine even at 3V or less (single CR2032).