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Sorry for not providing adequate info
1. voltage to be switched 250Vp,
2. Current :maximum 80mA
3. maximum waveform frequency :4kHz
3. switching time: 1Minute or more
In circuit i have intentionally increased switching time just to visualize waveform clearly.
Hi all
I have 4 different module, each module gives different types waveforms i.e sinewave , square wave sawtooth wave and pulse wave. i have 4 channels in which i want to get all those waveforms
Challange:
1. Any waveform can be connected to any channel.
2. i may need 16...
Hi Easy peasy Great help from you.
.
One thing i did not get is why i have to use Bmax 80mT, since i m using EE35 @ freq of 100kHz, Vrms =230V then Bmax =0.485mT.
if i
Thanks for all your replies.
here i want to correct my question. i m designing power supply which gives maximum 250V 80mA( continuous) and 250V 140mA (pulsed 8kHz duty cycle 80%).
as per all your suggestion EF20 looks very small to achieve such high current. i think EE35 suits my design...
Thanks alot.
it will be helpful if you could tell me which bobbin i have to use. i have selected EF20 , literature says above 20W and below 30W we can use EF20. now looks like i need more space
Thanks for the reply
of course the DC is not continuous. instead it is pulse waveform sampled at 8kHz. it is assumed that human skin impedance is in range of 1 to 2kohm. we increment current in the step of 2mA i.d 2m, 4m ,6m .....140mA. hence 2k*140mA =280V but i want to limit it to 250V.
Hello
I m developing on physiotherapy stimulator which works on AC. and output will be high voltage DC
input : 230V 50Hz
Output Voltage : 250V / 80mA . <0.5% of ripples
Switching frequency : 100kHz
SMPS transformer selected : EF20( suitable for 20W and above
To achieve above spec i...
Hi i m designing Physiotherapy device to supply variable intensity current to human skin
I have understood the human skin impedance. I have 12V power supply which needs to be boosted up to 140V and 0.14A current (max). I think for this application best suited topology is Current controlled...
Hello
I m working on project which operates on IR remote control. I have tested the output of IR remote through TSOP using Arduino it is giving 32bit Word.
Problem:
How i can Capture 32bit data from pic16f18856. In this microcontroller cature register is of only 16bit wide.
Hi Mr. FvM
Thank you for your kind reply. Do you Mean I have to Change System PLL value ? If so then wouldn't it change my system frequency every time?
HI
I want to Generate pure tone from 1kHz to 8kHz Signal Using MONO-Codec IC
Here What I Have
I m using DSP controller to Store the Lookup table of Sinewave (Mostly Program memory)
MIcrocontroller Communicate With Codec IC Using I2C and I2S protocol to set the Registers(I2C) Data for...
Hello,
I have the plan to design FM radio of frequency 90.4MHz (fixed). i m not finding right circuit so that I can quickly start with. There are many references i found such as designing with LM 386opamp.But i really dont know whether it works properly or not
Help me with any sharing verified...
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