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Re: Led Moving message code
Thanks for the awnser
Here is a sample code ( Bascom)
The Anodes of the Leds are at VCC, the cathodes to the shift registers. Not multiplexed.
Do
Outstring = ">>>>>>>>"
Gosub Processoutstring 'This procedure transform the message in a bit array
For A...
moving message code
Hi,
I'm designing and programming a LED moving message panel.
I'm using shif registers of course to shift the message out.
When I scroll in the same "direction" of the shift registers (the shifts are "pushed") everything works. But I need advice to scroll in the opsite...
vhdl counter
Hi,
I need to implement a simple VHDL frequency counter for a school project. Must be 4 multiplexed digits. (the FPGA as few macrocells).
I know how to implement the counter and the BCD to seven segment. is the multiplexing and puting things togheter that i need help.
Can anyone...
tb72725
Hi All,
I have a problem that is driving me nuts! I have a board that uses 3 constant current led drivers to drive some leds. At power up leds light randomly and only after I program the drivers to zero they go off. The output enable is active low and I have a pull up resistor (4k7)...
Hi All,
I have a circuit that uses a 74HC245 as buffer. I only use A bus to B bus direction and only use 4 inputs Device is allways enabled.
Can I leave the other inputs floating. Or should I ground them?
TIA
Hi,
I'm designing a LED matrix for Outdoor VMS of a considerable size (about 5meters).
There are about 16 matrix. From matrix to matrix are traveling signals, like clock, data out, latch enable etc.
What is the best circuit to amplify / regenerate signals? And about noise filtering (I did see...
I had build this circuit baut it does not work.
The signal is changing from 0 to 5V at R1 pin, but the transistor does not change state. It is allways on.
The transistor is logic level, P-channel, 30V, 3A.
I was thinking that using a logic level transistor was ik to switch 24v loads.
Do...
Hi all,
I'm evaluating PADS 2005. I'm stuck in asimple problem. I want to change a net name in pads logic. For instance I connect a net bettewen 2 points and PADS automaticaly name it $$$xxxx. When I right click on the net and choose to remane, all the options are grayed. Even the check box...
Switching noise
Hi all,
I have a circuit that a transistor is driven by a microcontroller I/O PIN.
The transistor is a BD436 PNP 20V 4A.
I have a 1K pull up resistor followed by 56R base resistor.
The transistor switches at about 1 Khz.
But instead of a clean pulse I have lots of pulses...
I dont have photos, but is not hard to solder SMT components. All you need is a solder flux (seringe) and a iron with very small tips. After component position apply solder flux in the leads of the component and then put a small piece of solder in the iron tip. Then, in a quicky movent pass the...
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