Tagged Questions
The parallel tag has no wiki summary.
0
votes
4answers
52 views
Which relay switches can be activated by the parallel port?
I'm planning on controlling some external circuits using the parallel port by switching on relays that can switch on the external circuits.
Am I right in thinking the pins have a voltage of 3-5V when ...
3
votes
3answers
154 views
Will a 0402 0.01uF cer cap next to a 0402 0.1uF cer cap have any power decoupling benefits?
I always understood that the point of using smaller caps in parallel was to provide low impedance at higher frequencies than the bigger caps, BECAUSE the higher capacitance caps 'usually' had larger ...
3
votes
2answers
83 views
Capacitor in parallel with resistor on xoscope amplifier schematic
Short version: Why is C3 necessary in this circuit?
Explanation:
The schematic for the input buffer/amplifier circuit for xoscope is made up of subsections that are mostly broken down in the ...
2
votes
2answers
55 views
Effect of Battery charging with un equal batteries in parallel
I have 24 VDC to 220 VAC Inverter and two 90 Ampere Batteries now I feel that backup is not what I need now I intend to connect these two existing batteries in parallel to give total of 12 volts and ...
2
votes
2answers
96 views
Simulation of parallel port but without a parallel port
I've been working on a project in my faculty that requires me to use a parallel port ,
As I see my laptop doesn't have a One !
I've been searching for a way to simulate the parallel port on my ...
1
vote
1answer
64 views
Why is there risk of overvoltage when jump-starting a vehicle?
Ford Focus C-Max manual describes jump-starting procedure as follows:
shut off everything, connect the jump cables, start the donor vehicle engine and let it run for a while, turn the ignition key on ...
-2
votes
2answers
135 views
Implementation of a large parallel algorithm for communication with a server
I want to run a parallel algorithm I will implement in Verilog/VHDL and use a FPGA to run it.
I have some questions:
How can I make an http request to servers using an FPGA - should I use a ...
2
votes
3answers
98 views
Writing to a Parallel to USB convertor [closed]
I hope this is the right forum, I've only ever used StackOverflow and am new to Electricals.
I have written an Access Control program in Delphi which sends an 8bit value to one of the three parallel ...
5
votes
6answers
510 views
What happens if I connect two different DC voltage sources in parallel?
I have a computer power supply that I'm hacking together as a bench supply. For this particular model to power on, I need a minimum load across both +5V and +12V.
"Easy," I thought, "I'll just ...
1
vote
2answers
120 views
Connect a microcontroller to a gadget
Although I have average programming skills, I'm not far from being an noob concerning electronics!
I therefore want to kindly ask you to help me connect my (already programmed) Arduino Uno to the ...
2
votes
2answers
123 views
Single resistor powering multiple LEDs in parallel where current through resistor is lower than max allowed current for an individual LED
While writing an answer about using multiple diodes connected to a single resistor, I stumbled upon a case about which I haven't read a lot: What happens when we set the resistor so that it sets the ...
4
votes
3answers
230 views
Why exactly can't a single resistor be used for many parallel LEDs?
Why can't you use a single resistor for a number of LEDs in parallel instead of one each?
1
vote
1answer
80 views
10 bit PISO shift register
I have a device that has a 10bit parallel output that I need to get to a serial input.
Can I use a 16 bit PISO shift register and somehow ignore the 6 LSB?
How might that work?
1
vote
3answers
142 views
Using Parallel port to Power circuits
How to use PC parallel port as a power supply for any device (similar to charging Mobile Phones). Actually I have to powrer my circuit based on parallel port. Which pin of parallel port can supply at ...
1
vote
1answer
79 views
Circuitry for Running Many Small Motors
I'm creating a simple vibration mat for a child which will be triggered by a force sensor. I'm not trying to do anything complex (like changing frequency of vibration) - simply an on/off circuit. What ...
