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Hi,
While finding FM module, I found audio FM transmitter which fits my demand.
however, that module is designed for audio use.
is it differnet from normal FM transmitter?
i'm trying to transmit 16bit AD-converted signal.
thank you in advance.
Hi, there.
I'm looking for a small but has high capacity battery.
At least the battery should have more than 10000mAh and any voltage would be OK.
As far as now, Lithum Inorganic battery(TL-5930), was the best that I found but its size is too big for usage.
Is there any smaller than that...
Thanks, tony_lth. I'll try low voltage battery and check out. thank you again.
---------- Post added at 03:20 ---------- Previous post was at 03:18 ----------
thank you for advice but what I want to know is the choice of battery. designing input voltage does not make a problem.
Hi, there.
I’m developing low-power consumption filter and amplifier devices but have a wondering point.
The system that I’m trying to is consisted of power regulator and Butterworth high pass filter, low pass filter and basic negative amplifiers. But I wander the driving voltage should be. It...
I've recorded nerve signal but I still wonder recorded signal is right one..
Recording system has 60Hz notch filter, however, in frequency domain, nearly 50~70Hz signal is still remained and it does not make a sense to me.
I've seen 58~62Hz spectrum peak due to 60Hz power noise, but this is...
High frequency signal is distributed model that is much differnet with normally operated signals: lumped models.
I think you should study RF systems including S parameter, impedance matching, etc.
It may not easy way, but hope you to make it.
Hi,
I am trying to transmit 433MHz-FM signal via small antenna.
The transmit area is very small that would be 4~5 meters, however, as transmitter size have to be very small, antenna size should be minimized.
This is first time for me to design FM system so need some advices from experienced...
Hi, there.
Recently, I’m trying to design FM transmitter and receiver system.
Transmitter should minimize power consumption so I use only VCO and antenna and transmitter range is only couple of meters.
However, designing receiver module, most commercialized FM receiver module transmits to PC by...
I have used atmega series for MCU, however, I found that its power consumption is too high for my project so I decided to change MCU.
Also I tried MSP430 series but power reduction is not satisfied..
The functions I need are
: SPI comm.
: UART comm.
: Port control - high or low TTL (6~10 pins)...
Search about sin wave generator.
There are so many method to generate a sin wave include high frequency.
also, you can calculate the amplitude using retifiter and integratos circuit by calculate rms value.
however i strongly recommend you to use oscilloscope!
There are so many many problems which affect other part IC chips.
First of all, make power line enough large not to act as a resistor. (ground, too)
Second, seperate power and ground lines from the its output pin of power reculator (or supply). Search about power feedbak.
Thrid, place enough...
Hi,
Recently I used various notchfilters but I am still undergoing some bad results.
Sometimes, center frecuencies varied as time passed by or Q value is not good enough.
Anyone plz recommend nice 60Hz notch filters?
Hi, there.
I gonna use ADS 8317 analog-to-digital converter and have a problem during testing it.
The problem is about input signal range that I need is 0~5V.
It's so weird that according to datasheet, input range is -Vref ~ +Vref with common voltage so I used 2.5V for reference level and...
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