You won't need series resistors for the leds. The tlc chip's outputs are designed to drive LEDs directly and are constant-current. You can think of it like the tlc chip contains self-adjusting series resistors for the LEDs.
@PaulRB
ah ok thank you, im ordering most of the stuff today to start testing,
Decoupling caps .1pf
TLC chips + sot to dip conv
595 chips
Mosfets
And then some buttions. Am i forgetting anything neccicary? I already have LEDS
Well, you're going to need some decent-sized breadboards, even to make a simple prototype. And some current-setting resistors for the tlc chips. I recommend using an Arduino that will plug directly into a breadboard, such as a Nano, or something more modern and faster, and building the prototype on the breadboard using solid core connecting wire, bent to lay flat on the breadboard. Like this.
Revoric:
Decoupling caps .1pf
Make that 0.1 uF. That letter makes it 6 orders of magnitude more (0.1 pF is about the capacitance of a piece of wire).
PaulRB:
a simple prototype.
That's not a simple prototype. That's a piece of art!
wvmarle:
Make that 0.1 uF. That letter makes it 6 orders of magnitude more (0.1 pF is about the capacitance of a piece of wire).That's not a simple prototype. That's a piece of art!
lol thank you!, ill post pictures once things arrive on GitHub and follow my process on there, lets see how abhorrent i can make this "art".
will .1pf be unusable lol....
is stringing caps together work? i bought 100 .1pf ones for surface mount lol
i have some .1uf i think ![]()
correction i have .01 uf and .001 uf
100 nF is the common value for decoupling caps.
Your 10 nF ones should do as well - as long as it's ceramic type. If you really want 100 nF you better buy a bag (they're really cheap) as placing 10 in parallel is a bit much. Or buy a box of 20x20 values or so, very convenient even if many values you may never use.
And out of curiousity I looked it up: yes 0.1 pF caps do actually exist. It's the smallest available value. I do wonder what the use is as just the stray capacitance of copper traces or a solder whisker is usually way larger than that.
@wvmarie
thank you i accidentally ordered pf lol, but i have plenty 10nf, what is the maximum value that would work as decoupling caps? thats interesting too i wonder what .1pf would be used for now knowing how small it is.
You see 0R resistors used. Maybe there is a corresponding use for 0.1pF caps...
For decoupling, not sure what's best. 100 nF is very common for digital chips. I have seen 10 nF as well, and for another project I'm using a 1 µF ceramic + 22 µF electrolytic on a 555. In some cases you even see multiple decoupling cap: 0.01, 0.1 and 1 µF ceramic and a larger (10-47 µF) electrolytic. This to catch more frequencies. Each cap is most effective at certain frequencies.
As you see, the values are not critical, and this is one of those points where art and engineering overlap.
@wvmarie @PaulRB
My stuff arrives tomorrow so i will be able to begin testing and prototyping.... i have no idea were to begin lol....
Begin with one tlc chip and a few LEDs on a breadboard.
@PaulRB @wvmarie
I'm at a road block i have no idea how to set up the code, i have been doing research for the past few days and cant find anything that i can understand on using both the tlc and 595. just to get it straight would i just plug the serial out or overflow from the tlc into the 595 or vice versa? if you guys know of any information or other posts about this please guide me to them!!! Thank you!
Revoric:
@PaulRB @wvmarieI'm at a road block i have no idea how to set up the code, i have been doing research for the past few days and cant find anything that i can understand on using both the tlc and 595. just to get it straight would i just plug the serial out or overflow from the tlc into the 595 or vice versa? if you guys know of any information or other posts about this please guide me to them!!! Thank you!
STOP.
What coding experience do you have.
Have you programmed in C++ before?
Have you actually programmed an Arduino before?
Tom.. ![]()
If your experience level is low, just start with a single 74hc595 and build a circuit to flash a few LEDs. (74hc595 does not have constant-current outputs so you will need to use series resistors for each led, e.g. 330R). Then move on to using a single tlc chip instead (with tlc you will not need the series resistors). You should be able to find tutorials on both these chips (separately) on the net.
