capacitors and transitors have a direction?

[Reaganomics!]

 

It sure does. That isn't just a jumper it's a diode meant to protect your circuit should you hook it up to a PSU with incorrect polarity. The striped end matches up with the stripe on the PCB.

 

 

Maybe on another circuit in another kit they also use this PCB for. In the kit he's using there's no mention at all of any diode in the schematic, layout or bill of materials.

 

http://www.generalguitargadgets.com/pdf/ggg_secf_mrfr_bom.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

 

http://www.generalguitargadgets.com/pdf/ggg_secf_lo_mrfr_si.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

 

http://www.generalguitargadgets.com/pdf/ggg_secf_sc_mrfr_si.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

[cryptosonic]

yea dude on the silkscreen where D1 is indicated.

[cryptosonic]

Maybe on another circuit in another kit they also use this PCB for. In the kit he's using there's no mention at all of any diode in the schematic, layout or bill of materials. http://www.generalguitargadgets.com/pdf/ggg_secf_mrfr_bom.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a http://www.generalguitargadgets.com/pdf/ggg_secf_lo_mrfr_si.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a http://www.generalguitargadgets.com/pdf/ggg_secf_sc_mrfr_si.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

Yea but look at the trace in the second link. The diode runs from V+ to ground. Can't hurt to put it in and it might someday hurt to leave it out

[Reaganomics!]

I guess, but it's really weird they specifically leave it out in all of the instructions on the lit. I think Hangwire's a little confused because it seems he's asking about putting the diode on the "jumper" spot at the top of the board. the diode symbol - D1 with the stripe - is at the bottom of the board near the transistors. where it says jumper on the board you either need to put a 0 ohm resistor or just a piece of wire or clipped off component lead like the leg of a resistor.

 

As for the jumper, I don't know if they put in a 0 ohm resistor or not.

 

or

 

The "blue cylinder with a black stripe" through me off because most diodes are black with a silver stripe. The metal film resistors are blue and a 0 ohm one would have one black stripe but it would be in the middle of the component not at the top.

[cryptosonic]

Being that it's a GGG kit which are good but definitely no frills I'd say one is meant to use lead clippings for the jumpers.

[AluminumFalcon]

 

The "blue cylinder with a black stripe" through me off because most diodes are black with a silver stripe. The metal film resistors are blue and a 0 ohm one would have one black stripe but it would be in the middle of the component not at the top.

 

 

Looks like a schottky diode to me. I think I can see BAT printed on the side of it. I have some BAT46 diodes that look very similar that I use for polarity protection.

[Blakemore Effects]

 

Looks like a schottky diode to me. I think I can see BAT printed on the side of it. I have some BAT46 diodes that look very similar that I use for polarity protection.

 

 

That's what I thought too. Looks like the Schottky's I own.

[AxAxSxS]

I could be way off base here, but I bet they have several builds that can be done from the same set of parts. It's probably cheaper for them to have a bunch of kits that can make several different variations than it is to go through stuff and make sure that exactly the right parts for that build are present. Labor costs and all that. So where it says to use a jumper... Use a jumper. IE a bare bit of wire. follow thier build schematic and you'll end up with what you wanted.
Diodes def have a correct direction. Will it kill your build if you use it? Probably not, but use a bit of wire.
I didn't click on all the links, just the pic of teh board, so I've no idea exactly what you are going for. but I did just build a fuzz from them and it worked as intended. do it thier way.

[V]

 

I could be way off base here, but I bet they have several builds that can be done from the same set of parts. It's probably cheaper for them to have a bunch of kits that can make several different variations than it is to go through stuff and make sure that exactly the right parts for that build are present. Labor costs and all that. So where it says to use a jumper... Use a jumper. IE a bare bit of wire. follow thier build schematic and you'll end up with what you wanted. Diodes def have a correct direction. Will it kill your build if you use it? Probably not, but use a bit of wire. I didn't click on all the links, just the pic of teh board, so I've no idea exactly what you are going for. but I did just build a fuzz from them and it worked as intended. do it thier way.

 

 

Um, if you put a diode in place of a jumper? That's not a good idea at all. You could end up with something very different that way. Diodes have a forward voltage flow which is why they are used in clipping circuits. That diode is meant to go in the spot marked D1 and for polarity protection, I'm sure. It may have been added in a later revision to the board and that would be why it's not in the instructions. It's definitely not interchangeable with a piece of wire or a resistor if you want to make the pedal as designed. A 1 ohm resistor could be used as a jumper but I'd just use a piece of lead or a wire.