A signal or power being generated by one system for consumption by another, or a connection for that purpose.

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0
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1answer
37 views

What is each pin's output voltage of an ATmega328P?

I would like to operate an ATmega328P in 3.3V supply alongside some other 3.3V non-5V-tolerant-peripherals. I looked up in the datasheet but I couldn't find an answer as to what is the output voltage ...
0
votes
1answer
35 views

How to put a battery and battery charger parallel in a circuit

I am making a speaker that runs at 3-5.5 RMS and I need a battery to supply power to it and so I got a house phone battery pack with a diode now I need a way to charge this so when it is charging that ...
0
votes
1answer
38 views

Analogic pin 0 (pin 14) problem UNO board

I have an Arduino Project developped for an UNO Arduino Board; the sketch have a size of 30000 bytes aprox. The whole set of features requeried works perfectly, but I have a problem with the A0 pin ...
1
vote
1answer
57 views

VGA switch 3 in 1 out [closed]

My team and I are going on a software development competition in 1 week. We will demonstrate the software on multiple laptops, but we have only one projector. So we need to be quickly able to switch ...
5
votes
2answers
147 views

Rail-to-rail oscillations in subtractor op amp circuit

simulate this circuit – Schematic created using CircuitLab Just bumped into a problem. When I am trying to make a voltage subtractor based on AD8055 op Amplifier, I get rail-to-rail ...
1
vote
1answer
74 views

Output table equivalent to state diagram?

I have the following state diagram to which I am supposed to construct an output table for. I have the answer, but I do not understand how they derived this output table? If someone could explain one ...
1
vote
2answers
63 views

Speaker level to line level

I want to reduce my apmlifier output to line-level. I found this tutorial which is compatible with 50Watts output power. There is also mentioned what to do if amplifier is more powerful than that. So ...
0
votes
2answers
43 views

Random timed output circuit [closed]

I am in need of some help with a project. I am trying to build a circuit that will turn on three LEDs randomly on a 1-5second cycle. I have the basic when it comes to electronics, but get stuck on ...
2
votes
2answers
121 views

How does a NOT gate bypass the output?

I have found the basic tutorials on gates and the way they work. However, I'm not understanding conceptually how a NOT gate, when activated, bypasses the output. Circuit as follows: simulate ...
2
votes
1answer
73 views

Voltage at output pin of a controller

I would like to ask a simple question. I do have controller whose pins are configured were configured as o/p. The controller runs at 3.3v and it's from the Pic18f family of controllers.Why is it that ...
2
votes
1answer
80 views

Help me find DAC Output function

Please help me find the output function, with \$V_{REF}\$ as reference, and \$b_5-b_0\$ as the digital input for this circuit (1): I'm kinda confused with this Series capacitor that's splitting the ...
3
votes
2answers
162 views

FFT + filtering sound = triggering signal

I'm trying to FFT the live input sound and filter it to have only 350 to 500 HZ. So, my goal is to turn the LED light on only when some sound has frequency between 350-500. I looked at FFT codes, but ...
2
votes
4answers
132 views

Confused about IN/OUT architecture of z80 chip

I am reading the manual, and it's a bit complex. I can't understand the machine code encoding for the life of me, but that's not my main concern ... my main concern is the address/data buses. I do ...
0
votes
1answer
489 views

ISIS Proteus - Simulating a buzzer using an Atmega 8535 Micro controller

I am new to micro controller programming. I am programming a Atmega 8535 micro controller using AVR Studio and simulating the circuit using ISIS Proteus. In ISIS Proteus, there is a buzzer output ...
1
vote
1answer
72 views

CMOS output voltage depending on Vss and Vdd

How does output voltage in CMOS depend on Vdd and Vss? As far as I know, it is limited by Vdd when Vss = 0 (ground) but what when Vss is not 0 (for ex. -2.5 V?)
-1
votes
1answer
200 views

Use the same pin as digital output and analog input with an ARM (sam3x / Arduino Due)

I have an application where I need to use one pin as a digital output and analog input. I switch between input and output at a "high" frequency (>1 kHz) and it takes to much time to disable and enable ...
3
votes
2answers
87 views

If a clock edge matches with data output edge what should SPI read?

I have an analog to digital converter that reads in and sends data out on falling edges. I also have two MCU's the FEZ Hydra and the FEZ Cobra. I've noticed using the oscilloscope that the data into ...
1
vote
1answer
115 views

CD40106 output voltage

I'm testing some CD40106BE from Texas Instrument, CMOS Hex Schmitt Trigger (Datasheet Here). Vdd = 5V (Pin14) Vss = GND (Pin7) Vin = 5V I measured a Vout = 3.8V on every IC I tested, with a Led on ...
6
votes
1answer
201 views

What's mean these microcontroller pin input/output modes?

I bought an stm32f103ret6. When I saw the reference manual, I saw that it has several I/O modes. For input: floating, pull-up, pull-down For output: analog, open-drain, push-pull I have already ...
2
votes
2answers
2k views

What is a “dry contact input”?

I'm a PC software guy, a newbie to electronics. Recently, I've got a project in which I need to source for a DAQ that can provide dry contact inputs to an interfacing digital output controller. The ...
1
vote
1answer
48 views

How to connect Verilog module's output to several wires?

Say I have a module foo(in1,in2,out); and module mad1(in,out); module mad2(in,out); module mad3(in,out); While instantiating ...
1
vote
1answer
67 views

Using a Line Decoder (Multiplexer) to set multiple outputs high

When using a 3-to-8 Line Decoder / Multiplexer such as the 74HC238, can I set multiple outputs (1-8) as high at the same time? As opposed to only one output high at any given time, and the rest are ...
-1
votes
2answers
280 views

Set Output Port High Low

I'm using MPLAB to compile a program in C using the CCS compiler. I want to set an output port as high or low using defined ports. #bit portOut1 = PORTC.0 So, I ...
-1
votes
1answer
88 views

Calculating Volts and acceleration from an accelerometer

I am using a Zephyr Bio-harness 3 device as an accelerometer project I'm working on. The device outputs in ADC units and I'm not sure how to convert these units into volts or gs. The specs of the ...
0
votes
3answers
174 views

Microcontroller I/O configuration

I have been using PIC microcontrollers and have been using MikroC for the programming but I am little bit confused about the ports. On a PIC16F84A the port is defined in mikroC as ...
0
votes
1answer
105 views

DSPIC30F4011 - Pin labled as “Alternative”, can I use it?

I am using a DSPIC30F4011 PIC ( datasheet ) to send commands to three devices (one Bluetooth, model RN42 and two LED Drivers, model TLC5947). In the data sheet for this PIC (on page 13), it has three ...
0
votes
1answer
241 views

Can't turn ON transistor from output of comparator?

I can't seem to turn on a 2n2222a with the output of a LM339 comparator, as soon as the base is connected to the output, directly or with a resistor, even if the output is 5 volts, 9 volts, I always ...
4
votes
2answers
261 views

5V Tolerance of 3.3V OUTPUT pin

Let's assume the following scenario: uC (@3.3V VDD) drives an I/O pin HIGH 3.3V (just to be clear, it's not an open-drain pin, so the p-channel mosfet of the output pin is actually driving the pin ...
2
votes
1answer
325 views

Thermocouple signal conditioning - how to deal with low output swing margin of amplifier?

I have this thermocouple conditioning circuit. Let's say my gain is 100. Minimum low level for AD8237 is 20mV. As K type thermocouple outputs 40uV per 1C, I will have 4mV per 1 degree C. This ...
2
votes
1answer
160 views

implementation of a large number of outputs (1024+)

I want to control 32x32 (or even 64x64) pieces of electroluminescent or electrochromic film with a microcontroller. Film itself will be driven by supertex hv816. Planned refresh frequency 2-4Hz. ...
4
votes
3answers
303 views

Using Single Ended Output with Differential Input by Grounding one Input

I am making a frequency generator using the AD9833 (programmed from the PIC16F876). I wish to use a Programmable Gain Amplifier to adjust the signal level before being sent to a power amplifier ...
0
votes
2answers
197 views

5v output to 3.3v?

I have a microcontroller and a Raspberry Pi, both running off of the same 5v supply, in parallel. The microcontroller has 4 5v output pins and the other is a Raspberry Pi, that can only accept inputs ...
1
vote
1answer
86 views

Powering the output side of a voltage regulator?

Would powering the output side of a voltage regulator cause any damage to it? (The ground pin would be attached as well) It will not be normally, but I am making a multi-voltage power converter and ...
0
votes
1answer
71 views

How do we OR two bits in ATxmega128?

I am working with ATxMega128 and programming it in C. I have two inputs coming from a sensor and I want to turn on an LED when I get output from either of the sensor. I can blink my LED if i get ...
2
votes
2answers
289 views

How can we alter a single pin of ATxMEGA128?

this might be a basic question but I did try searching for the answer before posting the question. So, I am trying to set one of the ports to output. I used ...
1
vote
1answer
367 views

Build an Audio Toggle Box

I want to build a small box with two audio inputs and two audio outputs, with two switches to control the current input/output. Something like this: http://www.youtube.com/watch?v=mQzLnt0_-zU I've ...
4
votes
1answer
227 views

PIC pins change state when DC motor connected

I'm new to PIC programming, and having trouble getting getting it control a DC motor. It's a PIC18F25K22, and a TI L293D driver. Power is suppliued by a 5V linear regulator connected to a desktop ...
10
votes
5answers
1k views

Hardware solution to fade LED on/off with digital output

I'd like to find a hardware-based solution to make LEDs fade from digital pins. i.e. instead of switching on/off, slowly fading (500ms) into/out of full brightness. I can't imagine a small capacitor ...
-2
votes
1answer
2k views

Can I connect a BNC output of DVR to the antenna input of a LED TV? [closed]

I have a DVR and a LED TV. The DVR provides 2 video outputs, VGA and BNC but the LED TV only accepts 2 possible video input (HDMI and antenna socket). In my mental model, as the BNC output of DVR and ...
0
votes
2answers
221 views

how do I output through GPIO pins instead of RS232 from a Z8 Encore MCU?

I'm currently learning about MCUs in school (read: n00b) and I'm trying to fool around with the equipment at home. Problem is that I only have a netbook and don't have any serial IOs on it, so I have ...
2
votes
3answers
222 views

Drive Fight on 7400 Series

I'm currently designing a 7400 series circuit to drive LEDs from a set of shift registers (74595). Each shift register's tri-state input is wired to the output of a 2:4 decoder (74139), and the ...
0
votes
2answers
910 views

How much power does 5V and 6A provide in Watts?

Am I right in concluding that a unit that says 5 V and 6 A on the back supplies 30 W of power? Or is it that it requires 30 W to be powered? And if so, how do i calculate how much power the unit ...
4
votes
2answers
979 views

Is pinch off voltage of JFET constant?

The drain current is related to gate to source voltage by the following equation: \$I_d = I_{dss} (1 - \frac{V_{gs}}{V_p})^2\$ Now, with changing \$V_{gs}\$, I think \$V_p\$ also changes. I am ...
4
votes
3answers
839 views

Using lots of slide potentiometer for computer control

I want to mount a bunch (say 16+) slide potentiometers in a long project box (or other housing that can sit on a desk) that I can use to interact with software on my computer, specifically lighting ...
5
votes
3answers
410 views

Does there exist an IC that allows on-the-fly routing of signals?

Do there exist ICs with N input pins and N output pins which, either via EEPROM setting or via on-the-fly control by a microcontroller, allow one to route each of the N inputs to ANY of the N outputs? ...
2
votes
2answers
144 views

Maximum effective range of RG-6/U in CCTV

How long RG-6u i can use in my cctv? what's is the effective range using RG-6u?
7
votes
1answer
123 views

Input and Output pin voltage specs on a datasheet

I'm a bit confused about input pin voltage tolerances and output pin voltage values of ICs. I would think that datasheets for ICs that involve signal inputs/outputs would list two values: The ...
3
votes
4answers
2k views

Pulldown resistor on output pin, how does output still work?

On a part I'm working with, it says that you can configure the part to operate in a particular mode by "strapping" a particular pin to ground. That is, it wants you to use a pulldown resistor to pull ...
5
votes
3answers
700 views

What shift register ICs am I looking for?

I'm designing a project that requires far more I/O than a typical microcontroller offers. No problem, right, just use shift registers and stuff. Wait nope, why am I having problems? I'm planning on ...
2
votes
2answers
1k views

difference between dry contact mode output and open collector output

We have a device which can work with dry contact input and a device which gives open collector output. Will it inter-operate? Is there any difference between dry contact mode output and open ...