that article is a microcontroller based application, it doent really have the phase control that we looking for, that is 10-20 or 30 degrees.
i still dont see that a time delay can be used to simulate a change in phase, its periodic with respect to the driving pulse
yes, a microcontroller, i...
ive tried the 555 without any luck, thats the only reason i mention it.
i think the timing delay and phase delay are somewhat similar if the timing delay can be triggered from a control pulse.. in that manner, it is always a fixed difference from the rising edge. Im not sure how to do this...
im trying to create a pump from three piezo disks. The have to fire just micro-millliseconds from each other to get the timing for the pumping action.
I was thinking a astable 555 but was unable to get it to work. It seems to always start with the caps charged so there is no phase delay from...
anyone have an idea on how to create a phase delay which is variable. Im not talking the start 180 degree flip flops though, but more like 10-20 degrees. I know this is not that hard to do with a u controller but need to try with standard ICs. A 555 comes to mind but I havent been able to get...
Hello,
I am having trouble with the power consumption by a paired mosfet array chip. The should be simple circuit is attached. The mosfet array (half bridge chip – FMP26 by IXYS) is being switched at 1-2MHz and thus, a 12A pin driver (EL7158) is being used to deliverer more current to the...
how about using a ultrasound transducer in the 1Mhz range as a reciver? Maybe if the transducer is the proper size relating to the size of the vibration and wavelength? Is there a way to amplify and calibrate it for recieved ampliutide?
Hello.
I need to quantify the amplitude of some vibration and waves we are experiencing. They motion is at approximately 1 to 1.5Mhz has an amplitude in the low micrometer to nanometer range. I understand that this is at the distance*frequency limit for a laser vibrometer. Other options I...
henneshoe - wow! its working!! I just wired the 1Khz to OE. Im not 100% sure about the tristate though, I do have a voltage divider of 5V, via two 10ks, on OE, is that correct?
somehow clicking on "thanks" and giving you the little star somehow downplays my appreciation.
Jim
I appreciate your time, but saying the RC is funny is not really helping as it is something I myself indicated as being in question. Its how to get rid of the time constant, as in 0 dealy, that was interested in.
VE1Bll- thanks for your efforts again. Will try this next week.
was thinking about this a little more.. if the cap is removed, then there will be close to 50 volts on the output of the pin driver.
gotta be a way to do this.
anyone else with thoughts?
thanks for your input VE1BLL. Ive now debating wiring up a prototype tomorrow (this is old project and already built pcbs on it) too see if this is salvagable
to answer your question, the half of the circuit (the n channel mosfet) can be connected to a negative...
there are resistors between the gates of the 7350 and pin driver.. If not, there ends up being some pretty large oscillations from impedance. they are generally pretty small in value, less than 10 ohms.
the x is just for a oscillator or crystal. It can be swopped out with function generator...
