View allAll Photos Tagged pwm
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If anyone can identify what the PWM Trust is, I’d be grateful to hear from you.
Thank you.
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Enamels: 1 (black)
Finish: Carbon black finish.
Material: White-metal (?).
Fixer: Pin.
Size: 1 ¼” x 1 ½” (31mm x 38mm).
Process: Die stamped.
Imprint: W. O. LEWIS (BADGES) LTD, B’HAM 19.
The DC motor, PWM speed control circuit , Choke, Potentiometer for speed control, 15 am breaker, on/off switch.
Slip Ring Induction Motor Drive with slip recovery using IGBT
Necessity:
Normally the Slip Ring Induction motor is used Variety of applications such as Rolling of high voltage Electrical cables, Telephone cables etc., where we have a lot of torque and speed control is required. The speed control in Slip Ring Induction Motor is done by varying the voltage drop at the outputs of the motor, using a rheostat. This Project consists of necessary hardware for driving a Slip Ring Induction Motor. Normally the slip voltage from the motor is dropped using a high wattage resistor or a heater which has no use. In this project we have included the slip voltage recovery system, Where the slip voltage is used to charge a Battery, so that the battery can be used at later time.
Operation:
The voltage outputs from the induction motor is first rectified and is controlled using IGBT section. The speed can be varied by applying the PWM Pulses to the IGBT Section from the PIC Microcontroller. The voltage drop at the output side is given as a input to the Battery for charging.
further details:pl visit www.maastechindia.com
This time I just soldered a wire to the 'DIM' pin (otherwise floating) and connected that straight to one PWM output.
This time I just soldered a wire to the 'DIM' pin (otherwise floating) and connected that straight to one PWM output.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
And it does work. I'm using a tiny BSS138 MOSFET and the usual PWM output to drive this board. Works perfectly, doesn't heat up. 12V 1.8W
If there should be a reincarnation of this board at some point, it would probably have dedicated PWM drivers.
To allow for further shrinkage, I will have to use a tinier AVR package and probably get a hot-air thingy.
Envelope generated by direct PWM synthesis on an Arduino. The beginning of this envelope is a 32-step exponential attack and the end is a 64-step exponential decay. The envelope is pre-computed using a small C program on a Linux machine, then stored in 256 bytes of Flash memory (ROM) in the Arduino's processor.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
My shield with RTC, LCD, RFlink and temperature measuring capability. It is aiming at low power mode so the 555 acts as interrupt generator to wake up the board (pin 2, about 180Hz). This really is the first version of the board so I expect bugs will happen.
The LCD backlight is controlable from Arduino using PWM (and filtering capacitor to smooth the transitions) on pin 11.
LCD and RTC are controlled using the two I2C expanders. Pins 7 and 8 act as write and read enable signals for RTC.
RFLink TX/RX are connected to pins 5 and 6. Pin 4 acts as chip enable for all RTC and RFLink chips.
Temperature measurement is done through pin A2.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.