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I am newbie in RF FSK 868M,2.4G band, i am using TI CC1110 transceiver and i can simply sending/receiving data.
However, i want to implement FHSS, and encounter a problem in synchronization,
i can understand one using fast hop while other using slow hop to get connected, but after that i...
Thx for your guy help
i am making a remote dimmer(use AC),
so i cannot test with bench supply(and i don't have other equipment),
and thx for the suggestion of using the other regulator
and thx for the PCB grounding suggestion .!:D
two channel dimmer
i use mcu to control 2 channel dimmer
However the light bulb lightness was not even
say when i fire @50% duty on 2 triac , one is brighter than other.
can anyone suggest any solution??
i am making a dimmer circuit
and i find a source on it in microchip
https://ww1.microchip.com/downloads/en/AppNotes/40171a.pdf
however the circuit have a R2 (1M ohm) in series with the power line
i wonder then how many current can be drive ???
as i connected the same circuit(with other...
i connect 1M resistor from main 110v ac to MCU
however, the zero cross is uneven
and i found that the waveform to mcu is a bit strange ..
as below
the point is not really drop to zero, and the scale have changed??(why??)
and this the resultant waveform fm my mcu
the falling edge or...
halo again
i try the result and post in below
purple line -> measure @ triac gate /gnd
yellow -> my mcu output to gate
blue -> voltage across the triac
it seems that half of ac have prbolem (blue line)
the positive half of ac was on (which should be off? that is when my mcu...
thx Fvm again~
the ac and dc connection are on above
i draw most of it as i guess you know the main principle
==>What's the return path for the current through R3?
thur R2 ?
My main reference is on that **broken link removed**
of Figure 2
the main differemce is that the ref use MCU to...
thx for ur reply
but can you elaborate more ?
1)"Look sharp and write obvious instead of unknown."
Why say so?
2)Connect DC power supply GND with Triac A1 terminal. Requires either an isolated supply or rearrangement of the AC load
why do that>?
my mcu drive the above dimmer in 12Vac
however the gate signal is greatly affect by the triac
and it's lost in control .
The gate and the MT1 signal are so low in impediance (abt 50-100 ohm)
and the MT1 signal feedback on the triac gate termianl. . .
how to solve it?
thx!!
p.S. if R3 is...
dimmer problem
my mcu drive the above dimmer in 12Vac
however the gate signal is greatly affect by the triac
and it's lost in control .
The gate and the MT1 signal are so low in impediance (abt 50-100 ohm)
and the MT1 signal feedback on the triac gate termianl. . .
how to solve it?
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