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Hi,
I m working on SIM521XX series gprs module, nw i hv SIM5218 Evaluation board.
I want to do email service with file attachment in this module as this module has Sd card slot and at commands to write and fetch the files from Sd card.
and also tcp/ip communication also.
but at starting i...
Hello,
I am working on 250W HID electronic ballast design.It has the input which is connected to 230 V AC ,50Hz mains supply and ballast output is connected to HID lamp.
Please find the attached.
I have one below issue.
While fitting this ballast in streetlight fixture, the output of...
I have tired with many ceramic capacitor upto 200nf 50v but the still it does not correct the pure dc vtg, and when i am using ellectrolytic cap other design ckt does nt work with it as it does nt provide the ignition vtg.
is their another solution.
I need to eliminate the noise from DC circuit.here is attached circuit.
I got the distored waveform acrose 7.5 K resistor.
Please help me to remove the noise, i have place the ceramic cap of value 100nf in parallel with 7.5 K resitor, but the still issue is remains same.
please help me out, i...
@barry,
could you please tell me can i convert TRIAC dimming into PWM dimming.
Actually IC is controlling by TRIAC dimming logic which has in built pWM dimming, and we neeed PWM logic.
Could you please guide us. or is their any logic to replace the TRIAC dimming by PWM dimming.
No, Actually IC has provision for inbuilt PWM so i have to add the design ckt for dimming, whaterver flyback converter output is again feed to the FB i.e feedback pin of TPS92210 ,so IC control the Dimming feature.
but i dnt understand how we can add the design logic for dimming.could you please...
I have to add design circuit for 0 to10 v analog interface for PWM dimming in my existing design.anyone please share the idea and design.
i dont understand how to do this.
already the circuit have dimming logic but i think that is for TRIAC dimming.
That means,any filter design could not affect on THD as bz the IC is not operating properly.plz explain....
i have added filter it reduces the thd but the problem is that it will also affect the PF it is also decerese.
Their is no way to solve issue
the solution is for led driver for 18W, and ckt have passive filter design.
I will post the schematic FYI,
- - - Updated - - -
Attached is Schematic for filter ckt
could you please help me if i am replacing line filtering ckt,whether it will reduce the thd,here now by replacing inductor with another i got the pf around 0.935 but the thd remains same.
so if m replacing the cap with higher value whether could it affect.
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