Hi there :)

First Post here but I allready found so much interesting posts and projects. I am building a Zendrive using following layout on vero:

As is dont have BAT41´s at home but lots of zener 9.1V Im asking myself if I could use them instead. Any idea? :hmmm:

Robin

Hi Guys,

I was thinking of using ultrabright 5mm LEDs for my power indicator with my 3PDT true bypass stomp wiring. I've seen 4.7k quoted for normal LEDs. How do I calculate what I should use instead? Does its luminosity (1000mcd vs 4500mcd) affect things? Are there any other considerations (other than price) I should be taking into account?

As always, many thanks,

ff

So I am rehousing my Chicken Salad and am wondering what is a good resistor to put in series with the LED for the 3pdt switch?

Newbie question here about clipping diodes.

Is there a big difference between a BAT41 and BAT46 when used as a clipping diode? Will the only difference between the two be that the BAT41 will start clipping sooner?

Thanks

I recently built a stomp box (out of a mid boost/frequency expander circuit), but with a 12-pos varitone, and a passive fuzz circuit (2 BAT46 Shottkey diodes)...but was wondering if the fuzz section would sound better, if I added a couple of silicon diodes to the output of the preamp, via a dpdt switch (or would it sound worse)? I'm kinda new at this, so sorry for the nOOb questions in advance :| . :mrgreen:

Sniff, sniff...I smell SPAM! :mrgreen:

I'm looking for a way to make my MXR phase 90 led flash smoothly with the with the speed of the sweep.
I can make the led flash on or off with the speed rate but would like to make it smooth
tia for any help

I'm assembling parts to build a HAO Rust Driver. The original used Sony (or Hitachi) 1SS119 diodes, which I'm having a hard time finding. Many folks recommend substituting 1N4148. In looking at the datasheets though, it seems 1N4154 might be a closer match. Problem is, I don't know enough yet to know what the critical characteristics are in this application. What to pay attention to, what to be less concerned with. Can someone help me with some guidance or insight please?

Hi,
How do you guys put a 2 color LED with 3 leads into a metel bezel since they come with a 2 hole plug? Is there some way to get it in?

Thanks!
2k3

Hello everybody,

I can't find a picture, but of course I can offer a vague and probably useless description, haha. Anyways, I bought a kit from a site that will remain nameless (just as a precaution) and they included a diode for reverse polarity protection. This diode they included was very small (size of a schottky) and it was blue... Anyone know what it is? Where I could find/buy them? I'm so curious, and I've tried searching with no luck...

Thank you in advance!!!

Hi,

Anyone used this? The negative resistance area of the characteristic curve promises quite a unique clipping waveform.

Juanro

hi guys. i built a big muff with a rotary switch for diodes. everything works ok except the germanium ones.
they just don't work, all of them.
i don't understand why.
if i measure them, they're good. but they don't work.

any idea?

The first is a black diode (I tested it, it IS a diode, Vf is about 1,9V), the label is DLL . (The black brick is known, it is an old Si diode, maybe from the DDR.)

And the others:

The labels are: E500C3, E600C3, E700C3. These may be selenium rectifiers, but I'm not shure. I've never seen anything similar.

Anyone seen these before?

HI

Can anyone tell me the difference and preferability of 3mm vs 5mm LEDs for clipping?

Im sure Ive seen 3mm and 5mm both used, is there a difference if the forward voltage is the same?
What about mixing and matching?
Ive read a bit about colours too if someone wants to give any guidance on that while they are here, im all ears

Thanks

If you put 2 diodes in parallel, the one with the lowest threshold will be the only one having an effect.

When you see diodes switched in parallel like the Timmy, that's what they're doing.

I like using bicolour LEDs for effects. I use Red to show power on, but effect off, and Green for effect on. It looks good, only needs one hole in the case, and just needs one switching contact (or logic output). It's low current (and can be made lower with the use of high efficiency LEDs - just increase the upper 1k resistor value). The 10µF makes sure there's no switching noise whatsoever!

Here's the circuit:
Bicolour LED.png

Give it a try - it looks really good. You can replace the upper...

Hello everybody,

I'm working on another diy project,and I wanted to use a dpdt footswitch (on-on) to switch between two different resistor values. This is not the problem. The problem is that I want to wire an LED indicator to the one side so when I switch from 'normal' to 'other' I can indicate this transition with an LED. Alas, I am not well-versed enough to do such a thing on my own. Anyone have any idea how this could be done? I'd greatly appreciate the assistance!

Thanks!

Looking at a new build. Based on my most recent experience LED's seem to have a fatter, smoother tone than the more standard silicon diodes commonly used. WHere does the germanium diode fit in all of this? I am looking at using switchable clipping between LED's and Germaniun diodes. From what I have read germanium is fatter /smoother than silicon diodes. Is this the case? What are the differences sonically between the various color LED's? How does the size of the LED impact the sound? ie 5mm vs...

Hello All,

I would like to make my own optocoupler, and I was wondering what resistance the photo-resistor should be? and what is the best color for the LED ?

Thanks for your time.

1) would this be asymmetrical since it uses 5 diodes or do i have to mix different diodes?
2) anybody already tried this and compare it to back-to-back clippers?

i would like to try this configuration on my future builds.
thanks and happy new year :thumbsup

Are Ge diodes, like the 1N34A Ge, prone to heat damage from soldering?
The measured resistance of a few Ge 1N34A that I have has are ~2ohm which seems silly for a diode?
The diode was not biased, that was just a DMM measurement.

Here's the plan:
2 independent channels in a single box (an overdrive and a booster) with 1 slot for 5mm RGB (common anode) LED for status indicator.

So I came up with a switching circuit that performs the following:
1) If the booster is on while the OD is bypassed, red color will light up.
2) If the OD is on while the booster is bypassed, green color will light up. &
3) If both are on, blue color will light up.

The thing is, I tried to test this circuit on a breadboard but only green and red...

How is th e polarity of the IN34 diodes , is the green stripe the (+)?
thanks, I'm working of debugging my KLONED and having problems.

pete