I built something similar to this, except it has an additional filter stage after the tone control to mimic the response characteristic of a typical guitar speaker.
@@jamesbelcher5318 Imagine you're on stage and it's dark. You need to replace the battery in your stomp box but you can't quite see the connector. You place the battery on the connector backwards. It doesn't mate so you turn it around. Too late! Just making contact blows up the op amp.
@@ElectronicswithProfessorFiore Except that it would very difficult to plug a 9V battery in backwards, since they are keyed. I wouldn't plug the battery in with the power switch on. BTW, wondering if I can get a parts list. I am laying out the PCB and I need the types and value to select proper foot prints on the PCB.
@@jamesbelcher5318 All you'd have to do is just touch the terminals with the battery reversed. It doesn't have to mate. It's just a metal to metal contact.
@@ElectronicswithProfessorFiore A follow on question, why not use a P-Channel FET for reverse voltage protection? Providing that the drain/source resistance of the MOSFET is low the amount of losses would be less which would improve battery life.
They are pin compatible, so you can swap one for the other. Slew rate and funity are the same. Without looking at the datasheets I seem to recall that the 07x had somewhat lower noise and DC offset than the 08x, but don't hold me to that. The DC offset wouldn't be a big deal as the circuit is capacitively coupled.
Cool, looking forward to making one of these.
Exciting, I'm looking forward to this series of videos.
Awesome !
I built something similar to this, except it has an additional filter stage after the tone control to mimic the response characteristic of a typical guitar speaker.
That was the basic purpose of the "bright switch", or as I used to say to a guitarist friend, a "dull switch" :-)
Got it immediately, D1 reverse battery protection. Been there done that.
ME too, but how does one put a 9V battery in backwards?
@@jamesbelcher5318 Imagine you're on stage and it's dark. You need to replace the battery in your stomp box but you can't quite see the connector. You place the battery on the connector backwards. It doesn't mate so you turn it around. Too late! Just making contact blows up the op amp.
@@ElectronicswithProfessorFiore Except that it would very difficult to plug a 9V battery in backwards, since they are keyed. I wouldn't plug the battery in with the power switch on. BTW, wondering if I can get a parts list. I am laying out the PCB and I need the types and value to select proper foot prints on the PCB.
@@jamesbelcher5318 All you'd have to do is just touch the terminals with the battery reversed. It doesn't have to mate. It's just a metal to metal contact.
@@ElectronicswithProfessorFiore A follow on question, why not use a P-Channel FET for reverse voltage protection? Providing that the drain/source resistance of the MOSFET is low the amount of losses would be less which would improve battery life.
How would a TL072 work vs a TL082?
They are pin compatible, so you can swap one for the other. Slew rate and funity are the same. Without looking at the datasheets I seem to recall that the 07x had somewhat lower noise and DC offset than the 08x, but don't hold me to that. The DC offset wouldn't be a big deal as the circuit is capacitively coupled.