BAJA Silent Selector

irmcdermott · Post by **irmcdermott** » 20 Nov 2010, 15:37

so i etched my board last night and then noticed that the jacks I got from smallbear are too big and the dc jack is too small to mount. which ones did you all use to mount them to the board?

the IC fits, so i know i didn't print it at the wrong resolution or anything like that.

irmcdermott · Post by **irmcdermott** » 20 Nov 2010, 15:37

so i etched my board last night and then noticed that the jacks I got from smallbear are too big and the dc jack is too small to mount. which ones did you all use to mount them to the board?

the IC fits, so i know i didn't print it at the wrong resolution or anything like that.

Barcode · Post by **Barcode** » 20 Nov 2010, 16:04

irmcdermott wrote:so i etched my board last night and then noticed that the jacks I got from smallbear are too big and the dc jack is too small to mount. which ones did you all use to mount them to the board?

the IC fits, so i know i didn't print it at the wrong resolution or anything like that.

I didn't mount mine, I usually don't. I wired them offboard.

bajaman · Post by **bajaman** » 20 Nov 2010, 22:59

the jacks used are Neutrik type NRJ6HF-1 or NRJ4HF-1 (just cut the ring contacts if you use the 6 pin variety)

irmcdermott · Post by **irmcdermott** » 08 Jan 2011, 05:01

finally got around to finishing this one, and it works great! totally noiseless, great design. thanks for all of your contributions! up next, the Baja Small Clone!

DimebuGG · Post by **DimebuGG** » 09 Nov 2011, 17:44

Baja,

If I'll use this circuit at 15V, any changes to be done?.

JiM · Post by **JiM** » 09 Nov 2011, 22:59

DimebuGG wrote:If I'll use this circuit at 15V, any changes to be done?.

Maybe a heatsink on the voltage regulator ?

DimebuGG · Post by **DimebuGG** » 10 Nov 2011, 04:55

I mean i'll be using the +15V regulated supply thru out the whole circuit.

JiM · Post by **JiM** » 10 Nov 2011, 21:56

DimebuGG wrote:I mean i'll be using the +15V regulated supply thru out the whole circuit.

The CMOS gates will withstand 15V without problem (just increased power consumption), but the current limiting resistor of each LED will have to be scaled.

hbo · Post by **hbo** » 02 Dec 2011, 10:39

Hi, Baja. First off, thanks for an excellent project.

I built this on vero last night (my own layout based on your schematic) and it didn't quite work as expected. After comparing your PCB layout to your schematic I noticed what I assume is a mistake on the schematic (the PCB layout seems correct based on the build reports here); one inverter (pin 8, 9) seems to have been drawn at the wrong location.

Given the CMOS logic involved here I'm guessing this inverter would throw things a bit off (explaining why my build didn't quite work). Is the schematic wrong or am I just seeing things?

hbo · Post by **hbo** » 04 Dec 2011, 07:51

I did a new vero build last night trying out the schematic update in my previous post, and it now works. I think the original schematic should be updated.
And here's my working vero layout.

bajaman · Post by **bajaman** » 04 Dec 2011, 19:36

good spotting Harald and yes you are correct - my schematic has an error

here is the corrected schematic
cheers
bajaman

rosetta · Post by **rosetta** » 08 Dec 2011, 02:40

does the old PCB work with this new schem???

bajaman · Post by **bajaman** » 08 Dec 2011, 11:41

the old PCB is correct (the old scheme was incorrect) - okay

Nick123 · Post by **Nick123** » 22 May 2012, 12:52

Great project and surely the next one for me.
I know that it should be noiseless but is there
any noticeable tone sucking ?

bajaman · Post by **bajaman** » 22 May 2012, 20:48

not that I have heard

bajaman · Post by **bajaman** » 08 Feb 2020, 22:27

: DSCF0004.jpg (51.72 KiB) Viewed 1939 times

: DSCF0006.jpg (12.88 KiB) Viewed 1939 times

: Baja Silent Selector.jpg (65.41 KiB) Viewed 1939 times

bajaman · Post by **bajaman** » 09 Feb 2020, 05:34

Baja Silent Selector Switch 090220.zip: (22.72 KiB) Downloaded 86 times

updated artwork etc with gerber files

I used multilayer ceramic capacitors for the 2u2 and 1u capacitors - (you can still use aluminium electros if you want to though i prefer to use the MLCC these days)
cheers
bajaman