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1
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2answers
65 views

Setup and hold for positive edge flip flop cascaded with negative edge flip flop

I know the following for two positive edge triggered flip flops in cascade. ...
1
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0answers
54 views

Not seeing set_address packet using USBTrace

I'm currently exploring the wonderous world of the USB Stack. I'm using a PIC18F2550 and the USB IO example available at www.moty22.co.uk. The code works as expected, but when using USBTrace (or any ...
2
votes
1answer
205 views

Need help setting up 7X6 Piranha LED Matrix with Arduino

I need help correctly getting my parts list for a 7X6 matrix that will be part of a electronic outdoor scoreboard. Here is my parts list so far but I am stump whether the arduino is powerful enough ...
0
votes
1answer
109 views

Help building a small solar charging kit

I'm trying to build a cheap light system for an NGO in Kenya, that will allow a family to have light using solar panels. If you're familiar with the new m-kopa service offered by Safaricom the setup ...
3
votes
4answers
393 views

If the output of a D type flip-flop appears immediately on the clock edge, how can the previous output be used?

The way I understand it, the input value (D) of a D type flip-flop appears immediately on the output (Q) of a D type flip when triggered by a positive clock edge. If this is the case, then how can the ...
2
votes
3answers
5k views

Hooking up an LCD to Arduino Diagram

Has anyone got a really clear diagram of the way to link up a 16x2 LCD screen to an Arduino? Basically I have an LCD for which the back light is coming on, but I am not getting any words appearing on ...
3
votes
3answers
339 views

ultrasonic setup guide

Does anybody know of any online resources that go over the setup of driving ultrasonic transducers, as well as how to receive an ultrasonic echo, and pick it out (for rangefinding)? I found one ...