Mail Day Thread

Mixed diodes, unlabeled? I’d request a refund.

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Hard to tell, but it looks like the individual diodes are labeled

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get out your magnifying glass , they are usually marked just very small and a pain to read.

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This was it. I’m blind as a bat, this wasn’t easy. Cheers.

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Yes be wary of replacing any diode for another. My understanding of a schotskyzener diode is that they change their behaviour once a certain voltage is sent through them reversing(?) the flow.

Nb: Updated as per @antoine.pasde2 's comment below

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Bit of a mixed bag yesterday/today:

Bigger pluggable headers for my power supply/bus board interconnects.

More knobs. (most of the smaller ones that just arrived are already installed on modules that were waiting for them.) The big knobs are a mistake. I misread the Amazon listing. It said for 1/4" shaft…but also said 6mm not 6.4mm like I thought it did :frowning: So they don’t fit. Grrr. I already have a bunch of this site for 6mm shafts.

And a new “wowstick” mini electric screwdriver. I have an ES121 that I loved…but the battery stopped taking a charge and I haven’t been able to find a suitable replacement (10440 sized 300mah lipo with flat top and protection circuit…can find lots of button top with no protection circuit…just no flat with protection) And with the new rails I wanted a small electric screw driver again to spare my wrist moving panels around (that’s one of the big reasons I’m abandoning wood. I have some major chronic tendon damage in my wrists and screwing modules in and out of wood turns out to cause it to flare up…big time. Which is a big part of why I’ve been putting off re-arranging some modules and installing some new ones.)

The wowstick isn’t bad…but I think I liked the ES121 better. The 121 had adjustable torque and motion sensing so I could control the speed by rotating it. The 121 also had a battery display. The wowstick is…just button operated…and seems to be higher speed but lower torque, with just a charging/charged indicator. But…it was also about 1/2 the price. And claims to be “dual power” which I assume means it will run off of USB power directly when the battery fails. It also has LED’s in the front which is kind of nice…but…I’d rather not waste power on LED’s as it seems to be slowing down already after removing only about 48 screws. So…nice for shifting a few modules here and there…but not going to cut it for loading/unloading a full rack :smiley:

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More jacks! This time the cool pcb mounted ones (got more than 2 of them, though)
And my first proper big boy oscilloscope!

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Proper job! I still get jealous of these scopes appearing on this thread.

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I think you meant Zener diodes, those are the ones that are used in reverse and have a specific reverse voltage. Schottky diodes are similar to rectifier diodes but with a lower forward voltage drop.

But yeah, you should not substitute diode types unless you know what you are doing. (Like using LEDs in the MS-20 filter instead of small signal diodes that one would normally expect in that type of circuit.)

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I have a track on the latest Global Underground mix by Joris Voorn and I just got the CD version in the mail! Yes, they still make CDs:

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Congrats!

(20 characters)

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the basic things you should be aware of when picking which diodes to choose:

-current rating -> you don’t want to fry them, so be sure you pick one that can handle what you plan to use it in
-max reverse voltage -> same thing, be sure it will not explode (or just start conducting) trying to block a higher voltage than it was designed for
-forward voltage -> diferent diodes have diferent forward voltage bias, which is (in a simplified model) the minimum voltage required for it to let current through. If you pick one that has a big FV, it might distort or “block” too much of the signal you want to control

there are more parameters that you could look at, but I believe these 3 are the ones you’ll be most interested in during synth building

examples:
-high current rating, high max reverse voltage, don’t care much about FV -> for rectifying diodes (used in the power supply board for example) nice choice: 1n4007

-dont care much about a high current rating, decent reverse voltage (dont pick a zener, for example!), low forward voltage -> signal diodes for controlling your audio signal. nice choice 1n4148, 1n914

-dont care much about current rating, well defined reverse current, dont care much about FV -> zener diodes, good to make power supply-independent reference voltages

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Mouser order arrived today! Finally can finish off a couple other boards that have been sitting here. It’s almost entirely SMD parts for various modules.

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Three days, three packages.

Wednesday, Tayda:

Miscellaneous capacitors, resistors, diodes, transistors. Some panel pots and a bunch of trimmers. Ripple counters, TL07xs. Screws and spacers.

Thursday — Thursday! Thanksgiving Day! USPS! I Know! — DigiKey:

MIDI sockets, JFETs, resistor arrays, 7555s, DACs, pricey op amps, optoisolators, still more trimmers.

Friday, SynthCube:

Transistor arrays, tempco resistors, and four MFOS circuit boards.

Gotta get breadboarding.

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got a couple MFOS boards today also and another VCO from Sam .

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Well, strangely enough my LMNC order showed up today, a week later than the ones I didn’t order. 100 percent was kindly working with me on a replacement order, which I won’t need now.

Also, the desoldering station I got last week is amazing.

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Yeah both my LMNC and my SynthCube orders are backwards . the orders from earlier in the month haven’t shown up yet , just the more recent orders . Don’t think I used different shipping , so not sure what is up .

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I have the mfos spring reverb in my cab it’s nice!

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Must’ve been one of Wilson’s last modules, if not the last

feeling left out :frowning: I am only waiting on some OP amps to fix a 19" power amp… I probably have some of tghe model anyway but my parts cabinets had to be moved whilst I fixed the tumble dryer…

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