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i am doing a school project where i need to built a single supply differential audio amplifier using lm1875. i have build the following circuit but sound is very low, i can barely here sound, how can i make it more loud? I am using 12v dc supply
i want to switch on and off a dc fan using mosfet depending upon lm35 output. so i build the below circuit, but it does not work. can some one please tell what i am doing wrong?
op amp pin 2 is at 0.25v and pin 3 at 0.32v
R11 is not connected.
VCC is 12v
Hello Luong,
I am trying to interface with vs1003 using SPI with pic32. Whenever I read any register it returns only zero and DREQ always remains at 0v.
On measuring voltage with multimeter I found GBUF, Left and Right at 0.4v and it gradually increases to 1.2v after like 4-5 minutes.
DREQ...
you want to connect PIC with PC? you can use PICs inbuilt USB module for PC communication, so no need of max232
check value of capacitor you are using with max232, i connect 4 capacitors of 1uF each.
thank you for your reply.
yes please suggest SMD BJT
I tried using 2N2222A transistor, i can cut power supply but when modem tries to attach to network it restarts because 2N2222A cannot provide 2amp peak current.
i want to switch load of 2amp (GSM modem) can any one advice any mosfet to use, preferably smd one.
for some reason gsm modem is not responding to off key so i have to cut its power supply.
i am using 3.3v pic and gsm modem needs about 4.2v
thanks
can baud rate of 921600 (already doubled:460800) be achieved using manchester encoding on 100mhz fm transmitter?
how do i calculate maximum baud rate possible using manchester encoding at 100mhz fm.
hello,
i have microcontroller (pic32) connected with accelerometer and mic, microcontroller will be connected to accelerometer using I2C and adc for mic, i want to transmit all the data using fm 108mhz, how to do it?
can i use the below scheme?
uC---->digital to analog--->Transmitter)))) -->...
in the attached picture of gps module can anyone please tell what are the two IC used for? they are marked with red arrows
also there is a unmasked ground pad, can anyone tell why the manufacturer left it? does it imporves gps signal reception?
if i am not wrong then for 12v SLA to charge it needs about 13.5V, can you please tell me if the above circuit will be able to provide sufficient voltage? i am using the solar panel with Peak Volts = 17.8V
these are the values of components:
R1-R3 : 6.2K
D1 : schottky 3A (1N5821,…)
R2-R4 : 1K...
can anyone tell if its possible to run a single OS on two beagle board together?
i want to use two beagle board and run single OS, like a dual core processor.
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