Just found your videos, wow…thanks! Trying to troubleshoot my DE-7 (the status on/off LED doesn’t light when pedal is on). Your video helped tons to help understand that circuitry. But I also need to figure out the power in AC adapter vs. Battery source supply. The schematic is confusing, I see where they use a stereo Jack on input (to enable the pedal) and a diode and 470 ohm resistor. With 9.08 Vdc input on AC adapter, I see the 470 ohm resistor dropping 2.5 V across it, but at all the Vcc places (like supply to the transistors that either short or open, in the toggle section of the on/off circuit) I read only 5.9Vdc from Vcc to chassis ground. In yours this is 9Vdc. I’m having a hard time reading the DC input.
Adding reply to myself. Found out the problem was some Boss pedals require ACA supplies which are unregulated 9 v and so supply more like 14 v. It works ok with one 9 v. Battery, but if powering from a supply, needs 12v. But the other solution was to remove the diode (D1) and resistor (R1) and solder in a jumper for each. Worked perfectly! Whew.
Thank you for this experiment. 👍👌 I always had difficulties wrapping my head around the Boss flip-flop switching. Your analysis of the circuit is the best!
Why is it some other switching circuit of boss like flanger bf2 is only one jfet 2sk30? How is to switch to flange and dry signal? Sorry for my english
I haven't looked at that one in a while but I'm pretty sure with the flanger the dry signal is always part of the output that's why there's only one jfet to let the wet signal in and out but the dry signal is always there
If I pull out r81 and r67 in this circuit, will the flipping part still work? Or maybe I should go as far as D2 and D3 and pull those instead? I'd like to troubleshoot and test the flipping circuit on a breadboard without the rest of the pedal.
Thank you for the reply and the video. This helped me understand this part of the board enough to finally fix a pedal I bought. Guitar Center had a scratch-and-dent table with a CH-1 Super Chorus than wouldn't turn on. It was $20 and looked brand new. Now it works great although the board is slightly mangled after my trial and error screwed up a few solder pads. Oh well. Once it's screwed together, you can't see that part.
not a case of live and let live. conventional current flow is wrong and it just makes me sad when I see people continuing to perpetuate the myth that current flows from + to -.
@@RobertMurphy-wm3ge I think in the end it depends on your definition of current. If you see current as a flow of CHARGE then you can look at it either way. I see current as a flow of electrons, because it's the electrons that are physically moving. The idea of a hole 'moving' will NEVER make any sense to me. Holes can't move, they are created and filled, but a hole is not a physical entity. I think the debate will continue for eternity until the definition of current is changed.
Awesome explanation !
Thank you. Great explanation.
Just found your videos, wow…thanks! Trying to troubleshoot my DE-7 (the status on/off LED doesn’t light when pedal is on). Your video helped tons to help understand that circuitry. But I also need to figure out the power in AC adapter vs. Battery source supply.
The schematic is confusing, I see where they use a stereo Jack on input (to enable the pedal) and a diode and 470 ohm resistor. With 9.08 Vdc input on AC adapter, I see the 470 ohm resistor dropping 2.5 V across it, but at all the Vcc places (like supply to the transistors that either short or open, in the toggle section of the on/off circuit) I read only 5.9Vdc from Vcc to chassis ground.
In yours this is 9Vdc.
I’m having a hard time reading the DC input.
Adding reply to myself. Found out the problem was some Boss pedals require ACA supplies which are unregulated 9 v and so supply more like 14 v. It works ok with one 9 v. Battery, but if powering from a supply, needs 12v. But the other solution was to remove the diode (D1) and resistor (R1) and solder in a jumper for each. Worked perfectly! Whew.
nice explanation :)
Thank you for this experiment. 👍👌
I always had difficulties wrapping my head around the Boss flip-flop switching.
Your analysis of the circuit is the best!
Exactly what I was looking for... Great explanation on the flip flop circuit!
Why is it some other switching circuit of boss like flanger bf2 is only one jfet 2sk30? How is to switch to flange and dry signal? Sorry for my english
I haven't looked at that one in a while but I'm pretty sure with the flanger the dry signal is always part of the output that's why there's only one jfet to let the wet signal in and out but the dry signal is always there
@@signalsandbitsthank you so much sir
If I pull out r81 and r67 in this circuit, will the flipping part still work? Or maybe I should go as far as D2 and D3 and pull those instead? I'd like to troubleshoot and test the flipping circuit on a breadboard without the rest of the pedal.
Yes you can build it on the breadboard up to r81 and r67 and it should work
Thank you for the reply and the video. This helped me understand this part of the board enough to finally fix a pedal I bought. Guitar Center had a scratch-and-dent table with a CH-1 Super Chorus than wouldn't turn on. It was $20 and looked brand new. Now it works great although the board is slightly mangled after my trial and error screwed up a few solder pads. Oh well. Once it's screwed together, you can't see that part.
Current flows FROM Ground to + (Electron Flow), NOT from + to Ground.
conventional current is convention... -(-i) still equals i. live and let live friend
not a case of live and let live. conventional current flow is wrong and it just makes me sad when I see people continuing to perpetuate the myth that current flows from + to -.
@@karlg5348other guy is right lol
@@shmishy760 in what way?
@@RobertMurphy-wm3ge I think in the end it depends on your definition of current. If you see current as a flow of CHARGE then you can look at it either way. I see current as a flow of electrons, because it's the electrons that are physically moving. The idea of a hole 'moving' will NEVER make any sense to me. Holes can't move, they are created and filled, but a hole is not a physical entity. I think the debate will continue for eternity until the definition of current is changed.