pedalSHIELD Bill of Materials and Alternatives

8 years 4 months ago #392 by Ray
Hi, yes we have replacements for all of them.
Im not at home right now, but later this evening I will post all que equivalent part numbers.
The following user(s) said Thank You: aknudsen

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8 years 4 months ago #393 by aknudsen
Thanks! I take it you will update the Mouser BOM then?

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8 years 4 months ago #394 by Ray
These are the equivalents:

Some of the parts cannot currently be resolved at Mouser:

140-50S5-271J-RC
ECQ-V1H104JL
ECE-A1HKA010
1-390261-2
3319W-3-504



D271K20Y5PH63L6R
I buy this in Farnell but any standard 100nF film will work fine(like R82EC3100DQ70J)
ECE-A1HKA010
517-4808-3004-CP
3319W-1-504
The following user(s) said Thank You: aknudsen

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8 years 4 months ago - 8 years 4 months ago #401 by aknudsen

Ray wrote: These are the equivalents:

Some of the parts cannot currently be resolved at Mouser:

140-50S5-271J-RC
ECQ-V1H104JL
ECE-A1HKA010
1-390261-2
3319W-3-504



D271K20Y5PH63L6R
I buy this in Farnell but any standard 100nF film will work fine(like R82EC3100DQ70J)
ECE-A1HKA010
517-4808-3004-CP
3319W-1-504


ECE-A1HKA010 is obsoleted though, did you find a replacement for this?

ECE-A1EKA4R7 is also out of stock, with a lead time of 16 weeks.

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8 years 4 months ago #403 by Ray
ooops sorry! Ive just copy/paste it from my last order, let me give you updated an available references when I arrive home.

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8 years 4 months ago - 8 years 4 months ago #405 by Ray

ECE-A1HKA010 is obsoleted though, did you find a replacement for this?

Any standard 1uf electrolytic will do, I would suggest:
USR1H010MDD Different manufacturer but 1uF 50 v and same dimensions 4x7mm

ECE-A1EKA4R7 is also out of stock, with a lead time of 16 weeks.

I would use 667-ECE-A1HKA4R7 (same brand, dimensions 4x7, 4.7uF and 50V)
The following user(s) said Thank You: aknudsen

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8 years 4 months ago #406 by aknudsen
Thanks again, looks as if the BOM is complete now.

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6 years 10 months ago - 6 years 10 months ago #868 by Ray
Hi, some folks ask me frequently for the 0.47 capacitors to be used in (C1 C4 C6 C7 C10 C11).
By doing this you are allowing lower harmonics to go into the circuit, the standard combination 100K resistor with 100nF cap attenuates values below 15Hz.
Using a 470nF, the whole deep spectrum down to 3Hz can go into the circuit.

By saying that 15Hz is pretty low, but if you want to experiment or you have some caps around you can try.
Any radial, through hole, ceramic capacitor between 470nF, 510nF 680nF with a voltage of 16V or higher will work. (Take care, if the voltage is too high, like 500V or so, they can be bulky and difficult to fit)

These are some Mouser suggestions:

www.mouser.co.uk/ProductDetail/TDK/FG14X...3KuujxEOfk3DSw%3d%3d

www.mouser.co.uk/ProductDetail/TDK/FG18X...DJDgDSJhre5xLg%3d%3d

www.mouser.co.uk/ProductDetail/TDK/FG26X...ahwTFFTbRCUr4g%3d%3d

www.mouser.co.uk/ProductDetail/Vishay-BC...F%252bPCiBYGAO0a0%3d

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6 years 6 months ago #1047 by menezes
Can the 50k resistor (R7 - actually 49.9k) be replaced with some other value?
I'm having some trouble finding those locally.
The following user(s) said Thank You: Ray

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6 years 6 months ago #1050 by Ray

Can the 50k resistor (R7 - actually 49.9k) be replaced with some other value?
I'm having some trouble finding those locally.

R7 value is the equivalent of R8 in parallel with R6 (100K//100K=50K) this resistor is used to equalize the offset currents and avoid having voltage offset at the output of the op-amp.

Since we are using a JFET op-amp (TL072) this offset currents are very low so you can build the pedal without this resistor:
Place any resistor from 0ohms (a wire shorting the pads) to 50K and it will work.
The following user(s) said Thank You: menezes

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