Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by killabyte

  1. killabyte

    cellphone camera search

    I need to use small cameras in different places and record about 300 pictures a day in each camera. the data is to be stored in portable media such a memory card or flash card in fact i´ve found miniature cameras but i have not found one as you could have in a v300 cellphone, i mean a small...
  2. killabyte

    cellphone camera search

    hi, im in finding a small camera module as a cellphone one does anyone know where to find one. i need to attach a flash memory card or some. best killabyte
  3. killabyte

    ramping stepper motor

    ok i´ll make a lower delay increase if anyone have tips... regards killa
  4. killabyte

    ramping stepper motor

    im ramping linearly time (in seconds vs delay) i mean delay in each step. im ramping from 0 to 1000 pulses per second, no load applied. when near to 300 pps the motor got stalled, i guess the ramp is not so linear i started using an initial delay of 200ms and after that the counter is...
  5. killabyte

    ramping stepper motor

    youre right i was confused cause ive seen in a paper that i should control torque to make a better use of energy. somewhere i got blamed thanks killa
  6. killabyte

    ramping stepper motor

    hi, im driving some stepper motors using the l297 and l298. and i want to know if allowable to accelerate the motor using a ramp dc increase in the v ref pin in the l297. this pin regulates the current delivered to motor windings through internal chopper circuit. instead acelerating the motor...
  7. killabyte

    stepper driver misbehaviour

    zappedagain may be correct, ill add some series resistance and put a snubber. cbarn: at 1A it is good torque but it depends on the mode used to drve the motor, the 2 phase mode gives the highest torque but other modes provides weak power and the shaft is easily stopped with fingers. now im...
  8. killabyte

    stepper driver misbehaviour

    just by trying to stop it with fingers and using the multimeter the motor dont miss a step. when i dont use the amperimeter and try to stop motor it losses steps. the thing is that i can see that im not getting plenty of power from the l298. im trying to get the best power allowable. anyway...
  9. killabyte

    stepper driver misbehaviour

    im totally sure there is more torque, the ammeter is well connected. regards killa
  10. killabyte

    stepper driver misbehaviour

    hi guys, recently ive been dealing with l298 stepper driver and using a l297 to control it through a 8 bits MCU in order to develop a small movement control system. the motor consumption is 1,2 A. power supply is 12vdc i found two problems when testing: 1. when inserted an amperimeter...
  11. killabyte

    electronic valve search

    thanks fopr your help, ill start loking for electric actuators for propane gas purposes. regards killa
  12. killabyte

    electronic valve search

    sorry, so im looking for an electronic or electric actuator and not a electronic valve. what do you mean with instrument air? i will use low pressure propane. thanks, im aiming to what i need Regards killabyte
  13. killabyte

    electronic valve search

    but i dont know how to deliver 30% or 50% or 90% off the gas valve using a solenoid one. the valve is less than one inch. how fast can i turn on and off such a solenoid to achieve PWM control? regards killa
  14. killabyte

    6,4VDC to TTL bidirectional bus shiftting

    hi, the b side is unknown, just certain that it is an output collector and is a bidirectional one. a common supply is not allowed, the b side device is a black box and cann not be opened, it just have two pins: gnd and dataI/O. the pullup resistance is already connected to its own supply inside...
  15. killabyte

    6,4VDC to TTL bidirectional bus shiftting

    the cpu is a motorola 68hc908gp32 working @ 5VDC , the opencollector swings between 6,0 and 0 VDC (digital signals). the data rate is between 10KBPS and 100KBPS sometimes slow sometimes fast. the lines are A<--->B and is just one line but later will go up to three lines: A<-->B, C<-->D, and...
See more

Part and Inventory Search

Back
Top