Tagged Questions

1
vote
2answers
257 views

Help verify 8x8x8 LED cube circuit

I am a beginning hobbyist when it comes to electronics. I have read lots of theory but I only have a little bit of hands on experience. I would like to build an 8x8x8 LED cube and I came up with this ...
4
votes
1answer
132 views

What is the cap for in Arduino reset circuit?

My Arduino AtMega328P board has this circuit for reset. I understand the switch (LTSpice didn't have a switch symbol) pulls the line low, thats obvious, but what does the cap do when reset comes ...
2
votes
1answer
169 views

How to determine what transistor is needed

I created a circuit that uses a transistor to run a small (1.5 - 3v) motor. The transistor I used was a 2n3904 NPN. I calculated Beta to be about 11 when it's hooked up to an Arduino the base resistor ...
0
votes
3answers
160 views

How feasible is it to wire into common household measuring instruments with a solid grasp of electrical engineering?

I'm studying up on EE and I have a budding grasp of circuits and ohms law so far. As I continue I wonder how feasible would it be for me to read data from existing electronic devices such as this ...
3
votes
1answer
190 views

Problem with circuit created with fabric pressure sensor

This is only my second time working with any type of circuitry, so I apologize in advance if I don't use the right terms when I explain my problem. Feel free to correct me! So in one of my projects, ...
3
votes
3answers
521 views

Simplifying a relay network

I'm currently trying to design a relay network for a piece of laboratory equipment (PPMS). I would like to describe what the setup is, what I am doing now, what I hope to do, and how I hope to do it. ...
3
votes
1answer
232 views

Coaxial connector to pin

I'm planning to use an Arduino ADC to sample radio signals from a DirecTV dish before passing them on to my computer. Before I can do that, I'd have to find coaxial connectors that can allow my ...
4
votes
1answer
2k views

How do I step down voltage and current in a DC application?

Background I am currently building a RC multicopter that utilizes an 11.1 V 20 C 2200 mAH LiPo battery as it's main power supply. This is fine to run the ESC's and motors; however, I also need a 5 ...
4
votes
1answer
125 views

Should I shield digital sensors in close proximity to one another? If so, how?

Hi and thanks for looking! Background I am building a RC multicopter, the design of which has already been helped along greatly by members of this community! Thank you. On the underside of the ...
1
vote
1answer
236 views

How do I manipulate a potentiometer over a wireless connection?

Hi and thanks for looking! Background I am building a RC multicopter using a KK controller. The controller has three potmeters to control gain/sensitivity for pitch, roll, and yaw channels. Since ...
1
vote
3answers
572 views

Programming Multiple ICs using single USBasp/SPI Bus and Arduino IDE

Hi and thanks for looking! Background After coding and designing a project with the Arduino hardware and IDE, I have been etching my own PCB with a single ATMega328 and related components for the ...
5
votes
4answers
430 views

What action is responsible for speed changes in a brushless DC motor?

Hi and thanks for looking! Background As a hobby, I enjoy tinkering with basic circuit building (often using Arduino) and lately I have mixed this hobby with another hobby of mine: building RC ...
0
votes
1answer
404 views

Wheatstone circuit not functioning

I have 3 dummy strain gauges suffering no strain (all 120 ohms, G.F=2.1) and the fourth (same characteristics) is meant to pick up torque at 45 degrees on a rod. It has been verified on an external ...
1
vote
3answers
713 views

Using RS232 to light bulb or move motor

How to arrange RS232 with relays and other circuit parts to light a bulb or move a motor? I initially used micro-controller (arduino) to provide RS232 input and use the output from arduino to do tasks ...