Hey guys!
So Ill try to keep this as simple as possible. I am recreating a turbo balancer i found on the web. I am not very educated with electronics, all self taught, but I do know a bit. This project includes two Piezo transducers in a push pull configuration connected by a rod with the rotational mass centered between the two, the rod will rock left and right de-pressing off one Peizo as it presses on the other. The idea is to make an led light as the rotational force point towards one Peizo. I think what this guys is doing is adding the de-pressed signal to the pressed signal in one direction and subtracting in the other to cancel itself out. Now the Led part of this I will leave out as I understand it, and have no problems. It is just a comparator with a variable voltage source to adjust sensitivity of the led blink. The inverting input of the comparator is connected to a variable voltage source while the non-inverting is fed with the output of the transducer circuitry. This circuit is based on a +9 -9 GND supply.
I cant figure out what I am doing wrong because I'm not sure what this circuit is doing. This is where hopefully you guys can help. I attached a picture of the Piezo circuit. Their are two of these one for left side, one for right. They are connected as: output 1 from one side will go to input 2 or 3 on the other depending if you have same or opposite polarity Piezos.
This Is was I think I know:
The Piezos are 3 wire, that I currently have -9 +9 wired to black and red and blue is my output. That output will swing Pos and Neg I think. So lets say my a pulse is positive on one said side. After IC1A my pulse is still positive at ICpin1. Then the Neg feedback loop will stabilize the output from swinging way high, as well keep ICpin1 close to the input at ICpin3. That Pos sig now reaches ICpin6 and will now be inverted to a neg pulse. (Now a Neg pulse out Makes me mind boggled how a feedback loop would help if the inverting input(pin6) in Pos and output is neg???). Now the output of IC1B Pin7 is fed to the other side of the balancer. Now Im not sure the difference here between: Output of IC1B Going to input 2 or 3 on the other side. So say my neg pulse is fed to input 2 IC2A pin 2/1. That neg pulse will then make the 2nd Piezos pulse into pin3 Twice as large at pin 1 right?(It will add the two) Then inverting that pulse to neg after IC2b.
If I input the start sides pulse into IN3 wouldnt that do the same thing right. pin6 would be the same size pulse pos as the input neg going to pin 5 there for adding them right?(Ex. -0.4v going to pin5 as a +0.4v goes to pin6 the output would be the same as a -0.4 going to pin2 as a +0.4 goes to pin3) I see how there adding but not canceling each other out the other way. Maybe one of you could explain this circuit to me.... Im also confused on inverting. If you send a Neg pulse to the inverting input as the non inverting is tide to ground what does that do? give you a pos out?
If this is to big of a pain to figure out then could someone help me work up a simple circuit that will add one direction and subtract(or do nothing) the other way. accurately
Thank you for any response, means alot!
So Ill try to keep this as simple as possible. I am recreating a turbo balancer i found on the web. I am not very educated with electronics, all self taught, but I do know a bit. This project includes two Piezo transducers in a push pull configuration connected by a rod with the rotational mass centered between the two, the rod will rock left and right de-pressing off one Peizo as it presses on the other. The idea is to make an led light as the rotational force point towards one Peizo. I think what this guys is doing is adding the de-pressed signal to the pressed signal in one direction and subtracting in the other to cancel itself out. Now the Led part of this I will leave out as I understand it, and have no problems. It is just a comparator with a variable voltage source to adjust sensitivity of the led blink. The inverting input of the comparator is connected to a variable voltage source while the non-inverting is fed with the output of the transducer circuitry. This circuit is based on a +9 -9 GND supply.
I cant figure out what I am doing wrong because I'm not sure what this circuit is doing. This is where hopefully you guys can help. I attached a picture of the Piezo circuit. Their are two of these one for left side, one for right. They are connected as: output 1 from one side will go to input 2 or 3 on the other depending if you have same or opposite polarity Piezos.
This Is was I think I know:
The Piezos are 3 wire, that I currently have -9 +9 wired to black and red and blue is my output. That output will swing Pos and Neg I think. So lets say my a pulse is positive on one said side. After IC1A my pulse is still positive at ICpin1. Then the Neg feedback loop will stabilize the output from swinging way high, as well keep ICpin1 close to the input at ICpin3. That Pos sig now reaches ICpin6 and will now be inverted to a neg pulse. (Now a Neg pulse out Makes me mind boggled how a feedback loop would help if the inverting input(pin6) in Pos and output is neg???). Now the output of IC1B Pin7 is fed to the other side of the balancer. Now Im not sure the difference here between: Output of IC1B Going to input 2 or 3 on the other side. So say my neg pulse is fed to input 2 IC2A pin 2/1. That neg pulse will then make the 2nd Piezos pulse into pin3 Twice as large at pin 1 right?(It will add the two) Then inverting that pulse to neg after IC2b.
If I input the start sides pulse into IN3 wouldnt that do the same thing right. pin6 would be the same size pulse pos as the input neg going to pin 5 there for adding them right?(Ex. -0.4v going to pin5 as a +0.4v goes to pin6 the output would be the same as a -0.4 going to pin2 as a +0.4 goes to pin3) I see how there adding but not canceling each other out the other way. Maybe one of you could explain this circuit to me.... Im also confused on inverting. If you send a Neg pulse to the inverting input as the non inverting is tide to ground what does that do? give you a pos out?
If this is to big of a pain to figure out then could someone help me work up a simple circuit that will add one direction and subtract(or do nothing) the other way. accurately
Thank you for any response, means alot!