That is an easy way to do it. I would encourage anyone interested in Sawtooth waves to look into current mirrors and constant current sources for charging the capacitor.
Yeah I was surprised the constant current sinking property of the transistor was not used here. It's an RC exponential curve thing with a transistor discharger?
actually the collector emitter junction has a small voltage drop, which means the cap wont discharge completely. using a mosftet would make it drop to 0
@@datpudding5338 no, the levels of the signals on the screen are almost randomly picked. He picked levels that are far away from any signal overlapping a line from the other one, but didnt have the screen real estate to completely separate them in 2 non-overlapping sections that only share their time domain axis
Nice video ... I just want to understand how to make the ramp output equal to the supply one ... I want use this schema to control my SCR based rectifier. If you put some light it will be greate help to me.
Hello! The output sawtooth frequency can be controlled by changing the input square wave frequency. Just note that capacitor value might need to change depending on the frequency range you desire (to stay in the linear 'ramp' region, to not fully charge).
idk if you allready found one since this comment is a year old but ... anyway maybe someone else has the same question . i guess you could use any "standart" npn transistor like a bc547 or a 2n2222
Thank you v. much sir
N from China
That is an easy way to do it. I would encourage anyone interested in Sawtooth waves to look into current mirrors and constant current sources for charging the capacitor.
Yeah I was surprised the constant current sinking property of the transistor was not used here. It's an RC exponential curve thing with a transistor discharger?
Great video, keep 'em coming.
I'm planning to my man!
@@WaveShapePlay yess! I really like your videos!
very helpful thank you
Thank you so much!!!
actually the collector emitter junction has a small voltage drop, which means the cap wont discharge completely. using a mosftet would make it drop to 0
Yes, you are correct! For the BJT there is a small emitter resistance ~25ohms which causes a slight offset.
Way late but does that explain the slight offset of the sqaure-wave rise to the sawtooth rise as seen at 5:33?
@@datpudding5338 no, the levels of the signals on the screen are almost randomly picked. He picked levels that are far away from any signal overlapping a line from the other one, but didnt have the screen real estate to completely separate them in 2 non-overlapping sections that only share their time domain axis
Nice video ... I just want to understand how to make the ramp output equal to the supply one ... I want use this schema to control my SCR based rectifier. If you put some light it will be greate help to me.
I wonder what the difference in timbre is between a 50% duty cycle saw and ~100%
100% on or off means there is no frequency since frequency describes the rate of change in a signal. Therefore it would be silent.
Hi! how i can control sawtooth wave rate ?
Hello! The output sawtooth frequency can be controlled by changing the input square wave frequency. Just note that capacitor value might need to change depending on the frequency range you desire (to stay in the linear 'ramp' region, to not fully charge).
Alas, there was no followup.
What transistor should i use?
idk if you allready found one since this comment is a year old but ... anyway maybe someone else has the same question . i guess you could use any "standart" npn transistor like a bc547 or a 2n2222
It's not a generator. It rather is a converter.
its 3am. wtf did i click on