Tagged Questions
-9
votes
1answer
68 views
Circuit Diagram Controller [closed]
I want to make a circuit diagram which will:
Read the speed of a servo
Divide the speed of servo
With the result of the division will be controlled the speed of an other motor like this: Servo ...
2
votes
1answer
104 views
How to build “two power sources” in a microcontroller circuit?
My circuit has a microcontroller, it uses power from a DC transformer (120V to 12V DC). My circuit also control an pneumatic valve which also use 12V DC. Almost every time when the pneumatic valve ...
2
votes
1answer
64 views
How to detect and identify multiple points of contact
I am looking for a way to detect & distinguish multiple points of contact from force or pressure. I have asked a related question at the URL listed below:
How to encode a large number of digital ...
4
votes
1answer
135 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 ...
1
vote
3answers
325 views
Any way to use N-channel mosfet in P-channel configuration?
In my application, I need the HIGH signal to turn a device OFF and vice versa. Clearly, this is P-mosfet configuration. However, I only N-mosfet on hand.
Is there any clever way to utilize N-mosfet to ...
3
votes
2answers
226 views
Adding Wifi+ Micro-controller to a device in an economical but production-able way
Is it possible to reliably and economically add Wifi+ Micro-controller(for very simple logic and GPIO) to a non-moving device? I see some wifi soc in the market too. are these a viable options? I am ...
1
vote
0answers
145 views
Good book for Microcontroller Interfacing [closed]
I have a bachelors in CS and have been a web developer for a few years. I consider myself to have a good understanding of computer architecture, however, I've been wanting to dive into Electronic ...
0
votes
1answer
94 views
how to use TMP87P809N microcontroller with any EEPROM
How to use TMP87P809N with any EEPROM so that I can save timer counting of CMOS RAM in EEPROM for backup, I want to save that counting if electricity get failed and restart.
3
votes
1answer
352 views
Can I connect ICs directly together
This is probably answered elsewhere but I can't seem to find it.
I have a circuit which uses a Mega8 to drive a couple of ICs as shown in the diagram below.
The ISP connectors in the diagram are:
...
2
votes
3answers
769 views
Calculate how much current is a microcontroller's pin drawing
I am reading up on microcontrollers and I want to know the current that RA0 is drawing when the switch is open but I think I'am getting it wrong. Also my electronics knowledge is elementary at best.
...
10
votes
5answers
479 views
What is the most cost effective way to produce a custom circuit board?
UPDATE June 21, 2012:
I purchased a Ferric Chloride, Positive Developer, and positive PCB boards from MG Chemicals and used the photo-etching process. The results were OUTSTANDING! You don't need ...
