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Hi firstly I am new here and would like to say that I am more of a hobbyist than an expert in electronics, However right now I am working on a phantom powered electret microphone for use as a direcional mic. The design of the mic amp is not mine, and is in a way a balanced output and is powered via the mixer phantom power system. I have found how e
Hello! I need activate load when ttl 3v input low. Is attached shematic will work good?157939
Vin = 9.2V - 9.8V. For the circuit mentioned in the figure, if Input Voltage crosses 10V , Zener gets activated. For the given circuit, when zener is activated, will more current flow through the base of PNP and cause any trouble to the PNP transistor ? Or the circuit would do fine ?
We are a midsize biotech organization with little/no internal Si design expertise that is likely to need outside design services for low-noise transimpedance amplifier arrays: 1000s of channels (possibly 10k's of channels in subsequent revs of the design), on as tight a pitch as reasonably possible. This will be Si-level design, with integrated D
I'm trying to figure out why when I measure current on my FLUKE 289 meter it reads .536 on the mA scale and 276 on the uA scale when I apply .52v from a power supply through a resistor. I assume the difference internal resistance. Can anyone confirm? Thanks PV
Hello All, I would like to know how the mobile knows which frequency(2G/3G/4G) it is using while communicating? for e.g. when i am moving, sometimes mobile shows it is in 3G network and sometimes in 4G Network. so i want to know when mobile network switch from 3G to 4G or vice versa, what really happens inside the mobile (hardware level)?
I am trying to design two amplifiers in this kind of system, and I think I need to test the open loop performance of the amplifiers before applying them to the system. could anyone tell me how to find the loading of these two amplifiers in this kind of system? 157811
Can we program ESP-32/ESP-12 other than Arduino compiler? like XC or some other C Programmer?
I am having issues driving a 16x2 LCD. Find the attached PDF. I have to write code for that LCD. I am trying 4-bit mode. Here is my code. All I get is black boxes on line 1. Line 2 is blank. I ran LED blink and it runs fine and perfect. #define _XTAL_FREQ 4000000UL // PIC18F4520 Configuration Bit Settings // 'C' sou
hai i need to interface PIC24f with max3421e via spi , max3421e has to act as host. i am not clear about how to configure max3421e as host, what i did is , i configured to work in host mode and full duplex mode is this enough? if not what else i has to do? from where i get the endpoint number and function address. ihave to connect max3421e to lan75
Hi everyone, For a project involving multiple drones communicating to a single base station, I'm looking for a chipset (or alternatively a module) that supports a star topology network (i.e. multiple transmitters sending data to a single receiver). I need quite a bit of range (about > 2 km) with antennas that aren't ridiculously large since they
I'm using Quartus Prime Lite and generated a clock buffer IP (using ALTIOBUF). It synthesizes fine in Synplify Pro, but when I try to compile the netlist, Quartus gives the error: "Error (12006): Node instance "clk_buf_altclkctrl_0_sub_component" instantiates undefined entity "clk_buf_altclkctrl_0_sub_0". I've included the file clk_buf.qip in the Q
Hi Forum, I have a mono signal from a microphone (approx 5mV) which I want to direct to either Output A or Output B with a push on a latch switch. What should I prefer in order to keep simplicity; Analog or Digital solution? I want to have a relay without the "click-noise" when changing from either A or B. I know there are some relays out the
What is the value and function of both v and vbar is this schematic at the vref inputs ? 157617
Hello All, I need to design a clock devider using PBJT. So it should look like this: 157612 However, when i do it from PBJT, the output starts oscilate due to immediate changes of D input, when clock is high. 157613 Id like to build this to hold the output until next positive level of C
In class, we were asked to design an amplifier with a given output of 3V using op amps. The output remains the same irrespective of the voltage at the input. I really need assistance getting through this.
Hello my question about Transmission coefficient S21, I researched in several books and articles that it transmits in -3dB, but does not inform the following condition. When lower value better transmission? Example: better than . All material uses -3dB value, which I understand in theory that in S11, when it is lower, the better the r
Hi everyone, I need to design a Lock in architecture(I-Q demodulator) for impedance measurement. I have to decide on the mixer architecture which performs a direct down-conversion (zero-IF) for (RF = L0) frequency range from 20KHz to 20MHz in 350nm technology CMOS. I need a few starting references to start the design and also it would be helpful
Hello, We need two stepwise ramping reference voltages from a PIC micro (as in the attached waveform). Is this possible? Originally I was going to do it with analog circuitry so I posted this????.. ..b
I am using STONE HMI display (from: ) doing developing an open source medical device using a microcontroller (Arduino or Raspberry pi) with attached ECG,etc. circuits. I have not decided yet if I will make it: 1) with Arduino, which means I will have to switch between the circuits manually. 2)with Raspberry pi with LCD