# Tagged Questions

Duty Cycle is the ratio between duration of a pulse and the entire period of a (repeating) square wave, expressed in %.

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### Average current (power) drawn per CPU cycle for smart phone Samsung Wonder CPU 1.4 GHz Scorpion Qualcomm MSM8255T Snapdragon [on hold]

kindly I need to know how much average current is consumed for each cycle for the above mentioned CPU
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### Frequency of an applied PWM to a motor [duplicate]

What kind of behaviour change should I expect to see, if I feed a 12V 50kHz frequency, with 50% duty cycle, or a 100Hz 50% duty cycle, across a DC Motor?
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### How to translate Change in Duty Cycle?

Morning! I have a sensor, output of which is change in Duty Cycle of current. Now, this sensor is to be used with a MCU. My knowledge of sensors with change in duty cycle as output is limited. So,i ...
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### IR receivers: how to interpet “Max. Envelope Duty Cycle vs. Burst Length”?

In the datasheet of an IR receiver IC, intended for remote control applications, there exists this graph. Why is there such a sharp translation after a certain carrier impulse count?
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### How do I calculate battery life allowing for duty cycle?

I have a battery rated at 2610mAh. The device it's powering transmits to the network for 35ms during this time it uses 1.95mA of power. the rest of the time the device draws 0mA. I want to workout how ...
204 views

### What is my microcontroller power duty cycle?

Say I have a uC active for 1s every 100s, sleep otherwise. This will lead to 1% duty cycle. But what if it is active ones every ten seconds, and once every 100 seconds, and then once every week? ...
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### how to create a square wave with large duration and high duty cycle

For a "plant waterer circuit" I would like to add a safety feature that prevents watering for over ~3 minutes, and delays the next watering from occurring for ~12 hours. Currently the circuit is ...
536 views

### Joule Thief - operation and the 'supercharged' version

I've made a joule thief, and it works fairly well, but not as well as I would like. It's powering a 3.2v LED from a 1.2v battery, but it's very dim. I'm hoping increasing the voltage from the JT ...
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### How to choose the right premble time, acknowledgement time as a percentage of total cycle time in X-MAC Protocol in 802.15.4

I am working on an analytic model for X-MAC, I came across some important duration and I am confused how to select them. cycle_length = one complete cycle (per transmission) in ms ...
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### What is a good rule of thumb for practical minimum design duty cycle for a PWM DC motor controller?

I am designing a drive that outputs an RPM of about ~350, with output torque of about ~10 mNm. I found a cheap motor that provides this torque (plus more for insurance), but the speed at rated voltage ...
280 views

### Regulate DC-Pump throughput

Does anybody know whether it is possible to easily regulate the throughput of a DC water pump? E.g. one you would use for your pond or indoor fountain. I would like to avoid lowering the duty cycle ...
365 views

### How might I wire a split pi converter to transistors as to maximize output voltage?

I was looking into various dc-dc converter designs, and I was interested in the split pi converter. As a start, I just want to maximize the output voltage. I know in theory, the output voltage could ...