By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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would it be possible instead of a 555 timer but use an audio source to create a spike that could be used to clock the circuit with audio and be set up as a small sound operated light display of some kind.
Thank you for your statement 'bit like a scope'. I wonder if anyone else ' latched' on to that idea. Mmm! Another five rows of LEDs and how many chips? I'm nearly 80 years old and can't get my brain around that. Over to you. Hehe
What is the resistor used for on what looks like pins 13 and 14?
What if we ran an audio signal through the input?
SN74HC595
Hi sir.
Can you give me the schematic? thank you so much.
Hi .. Thank You… Is possible that you can send me the diagram for this circuit? Or a link..
Very helpful!!!!
выглядит отлично! но по видео не удается разобрать все подключения.
есть возможность выложить схему?
видимо, какая-то ошибка у меня в разводке 555.
у кого получилось, можете показать схему? и номинал резистора между 13 и 14 ножками.
looks great! but the video fails to parse all the connections.
Is it possible to lay out a diagram?
Apparently, some kind of error in my wiring 555.
who did it, can you show the circuit? and the value of the resistor between 13 and 14 legs.
the shift register contains a current limiting resistor at each output. many 74h series do. that is the reason the amperage isnt ruining leds. this is misleading.
Whether clocking both SH_CP and ST_CP simultaneously causes a race condition or not, the datasheet shows that the clock pulses are 180° out of phase. Therefore if you connect the SH_CP directly to the 555 timer and ST_CP to the 555 through an inverter, any problems with instability within the 74HC595 are resolved. This also matches the clocking pattern in the datasheet.
I had a set of these arrive this week, and I wired up a circuit to test them, and so far as I can tell, either the chips I received have a 100% failure rate, or I'm doing something wrong, and neither makes sense.
Source input is 3.3v, clock input on both RCLK and SRCLK is 10hz, OE and SRCLR verified tied to VCC. Pushbutton on SER similar to what Julian is using here. I've used a meter to check every input, both on the breadboard and directly at the chip pin, and I've checked and rechecked the values, but no matter what, it behaves as if the SER value is tied to ground. (Sometimes the outputs are all high when I plug it into the circuit, then they cycle low immediately and stay that way no matter what I do with SER.)
Sanity check dictates that there's no way the company sent me 250 faulty shift registers, but I've verified every pin both with the datasheet(which, by the way, specifies that the "race condition" isn't an issue, tying SRCLK and RCLK together simply puts the output latch 1 clock cycle behind the internal register) and verified with a probe that it's getting the right value.
The only way I've managed to get them to work as advertised is by placing the chip on top of the breadboard and then holding it in with slight pressure. This doesn't always work, and even if it did would be inadequate for obvious reasons, but checking the signals directly at the chip pins proves that it can't be a breadboard problem, because the signals do appear on the indicated pins.
I'm out of ideas, and I'm torn between dumping the entire shipment in the trash or giving the seller a 1-star review, both of which don't make sense because as I said already, while 1 or 2 faulty chips is unlikely but possible, 250 of them borders on impossible.
Good video do you have a Electronic Circuit for this