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I contacted multiple fleabay sellers about the Rth on the heatsinks they sell ... and they are completely clueless :-/
So, I'm looking the other way around... what about IRF4905?
with Rds(on) = 0.02 that makes 1.25 Watts in the transistor and thus (with same to220 package) 70 degrees at the...
you might want to check this: https://en.wikipedia.org/wiki/USB_On-The-Go
usb OTG has a supplementary pin, which indicates to the controller how to behave (host or device).
The status of the pin is "hard wired" in the connectors.
if you look at your phone to pc connector, you'll see that it is...
That's a lot of code to review.
can't you make use of a "for" loop instead of those:
if (currentint == 2) {
//9 apart
if (analog_in >= 235) {mcp4013pulses = 31;}
if ((analog_in >= 225) && (analog_in <= 234)) {mcp4013pulses = 32;}
if ((analog_in >= 215) &&...
looking at fleabay, I'm considering the IRF 9540N with to220 package.
I calculated Tj at 8amps ... and I end up with 500 degrees ... so either I'm calculating it wrong or I badly need a heatsink :D
even dropping the "warning" functionnality and thus staying at 4 amps wouldn't work.
I'm using...
Ok, I will stop changing my mind and just go for it.
so, according to all reviews and opinions ... this would work:
I add the 3 test points LSPN to show where my module attaches. it should be clearer.
I still need to choose Q1... which should be an issue of "what's available for cheap on...
I will remake a new schematic which shows the actual connections of everything :)
I have the chance to have a bike that use a "3 pin connector" for the "winker unit", so I actually have +12V/GND and +12V for the lamps/leds.
1. Yes, the lamps are connected to the chassis. I could "unplug" them...
Hey guys ...
sorry for the lack of news.
If you must know, I'm currently buying a house... and it takes a lot of my spare time with those awful banks :-/
I didn't forget the project ... and the more I think about it, the more I'm thinking the 'solid state two terminal oscillator' solution...
Thanks for all the comments.
I think I didn't understand why I needed 22Volts to drive the FET ... but I'll work on that :)
gonna document myself :)
I have seen some of these "astable multivibrator" variants, and they all seem to use the load as part of the multivibrator setup (didn't look too...
thank you all for your responses :)
Ok for R3.
R6 actually is my load as Alexan pointed out.
I cannot move the load anywhere else, I'll try to remake the schematic to show where the module I'm making connects with the whole thing.
The lamps are tied to the ground and I have to provide them...
Hello there :D
I'm trying to remember how to do "basic" electronics and the first small project I'm on is my bike turn signal ... based on the famous NE555.
ok, there's plenty of examples with NE555 ... and I shouldn't have screwed that part ... but I haven't done electronics in nearly 10...
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