DDSR (/ClockBox Frame) Bus switches

[BugBrand]

I've had a number of queries about these - partly as I haven't yet done an instruction sheet.

Both the DDSR and the Quad Divider will have Bus routing options which will allow the Dual Clock Oscillator to directly drive them without patching.

There are 2pin headers, which carry full range 0 to +10V pulse waves from the DualClockOsc (DCO?! Dunno if that's a confusing name..)

This twin signal cable is received on the DDSR and QDiv modules, then there are also then 3pin headers so you can select by jumper which clock goes to the respective bus switch. As standard I will probably be setting Left to Clk1 and Right to Clk2.


Now, I did a few Chirpers with DDSRs and it struck me that I could probably wire up the bus routing - actually it was a little involved because the +/-5V osc outputs are NOT enough to clock via the bus input (they DO clock via the regular clock inputs though because these pass through input comparators)

I will at some point before too long post a picture of how and where to do the rear wiring for this - you need to add diodes and wire - not massively complex but at little bit...


If this is unclear (likely!) then ask questions!

[k_bntzn]

Keepin it modular for now.

[chrisdermo]

Seriously looking forward to those other modules
particularly the divider - keep finding myself wanting to have things at half and quarter speed but unable to do so. Have been trying to use the rev1 weevil as a triple clock provider but getting the sync spots just right can prove quite difficult especially at faster speeds. Maybe I need to go the other way and try use the envelopes with attack-only to divide rather than squarewave syncs to produce multiplications

[ninGiaBoom]

Keepin it modular for now.

"Phhheeeew" says my bank account

[BugBrand]

Here are some pics of how to take Bus-Clock from the Chirper to modules like the DDSR:::

[rico loverde]

Are the diodes 1n4148’s?

[BugBrand]

Are the diodes 1n4148’s?

Yes - bog standard silicon signal diodes.
(sorry, super minimal post above!)

[DickMarker]

Just wanted to bump this as I've just recently connected the Chirper's oscillators to the DDSR buses as shown in the above pics^^^
Really cool having the two linked up and ready to talk at the flick of a switch, highly recommended procedure!

[castano]

I’ve been wanting to do this mod, but have no soldering experience, till I find someone

[northerntao]

I haven’t looked at the back of my DDSR, but does it already have the necessary header? Is that the box that connects to the Bus in the DDSR block diagram?

[DickMarker]

I haven’t looked at the back of my DDSR, but does it already have the necessary header? Is that the box that connects to the Bus in the DDSR block diagram?

I believe it should have, right next to the jumper switch.

[BugBrand]

Yes, the header is two way - it can carry two different clocks and then you have a jumper on each Shift-reg side to select either clock 1 or 2.
So perfect to connect the two Chirper signals - then use the jumpers to select which Chirp-Osc clocks which side of the DDSR.
(stupidly this approach is slightly different on the Dual Divide - that has one clock line and one reset line...)

[northerntao]

I just realized this post was from a couple of years ago! This looks really cool, being able to clock it without having to sacrifice an envelope or use an external source. I may have to pick up a Chirper if I see one used. I’m a bit ham fisted when it comes to soldering SMT stuff, but this looks pretty easy.

[DickMarker]

I just realized this post was from a couple of years ago! This looks really cool, being able to clock it without having to sacrifice an envelope or use an external source. I may have to pick up a Chirper if I see one used. I’m a bit ham fisted when it comes to soldering SMT stuff, but this looks pretty easy.

I know what you mean about SMT but this really is an easy job. Did it in a couple of minutes.

[BananaPlug]

This seems like a good place to ask about the two 2pin headers on the back of the Dual Divider. Marked "Clk" on the silkscreen. Ins? Outs? How do they interact with the Bus/Ext switch?

[BugBrand]

DDiv actually says Clk on one side (pin1) and Rst on the other (pin2) - both inputs.
Clk goes via the panel switch
Rst diode-sums to the reset in & button - thinking was for a global reset bus for example.