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in common datasheets the view side of the components is top view
but in lm35's datasheet the view side is bottom view so please check supply pins not to be connected incorrect
if you connect them correctly it won't get warm ever!!!
thanks guy
yeah:-D
i had disbled jtag and m103 fusebits before
atmega128 has two sets of vcc and gnd pins,because of connecting only one set of them MCU was not working quite right (all the ports worked fine except F and G)
everyone please note that to connect both of them otherwise you will...
hi all
because of 4Kb ram, 7 I/O ports and reasonable price of ATMEGA128 i've selected it
after creating smd to dip adapter and programming the MCU i faced a problem that i changed M103C fusebit,however problem solved but i found that PORTF cannot act as I/O
i read many topics in this forum...
thanks
what is the resistor type in this circuit??i asked because of inductive effect of coiled wire resistors at high frequencies
shall i use carbonized resistors for example?
thanks so much
i found out hm-t module output impedance is not 50 ohm and the ouput power is about 4mw i think
but in bgy204 module catalogue emphasizes that the input impedance and power must 50 ohm and less than 2 mw
how can i attenuate the ouput power of "hm-t" and match the impedance between...
1.set the adc clock as low as it permitts you
2.place a 100 nf capactior between lm35 output pin and ground
when an adc wire gets longer than 20 30 cm,it acts as an powerful antenna and gets all microwaves in the air then make the adc value unstable
if you see an antenna output on oscilloscope...
thanks alot guys
now what is the difference between stripeline or microstripe?which is better?
i bought fr-4 pcb yesterday and measured the di-electric constant by capacitance meter on my multimeter by solving "c=k*8.85*10^-12*A/L" equation
i found fr-4 di-electric constant 4.9!is it a correct...
hi everyone
i'm working on a project which needs serial data transmission
i used hm-t FSK Module @ 915 MHZ frequency!but it's too weak!only 5 mw output power
i chose "bgy204" ufh rf amplifier module from NXP!it amplifies signals between 800 to 915 mhz!
BGY204 Datasheet pdf - UHF amplifier...
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