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Help with PWM dimmer?
Ello mates,so i biult a pwm dimmer acording to https://www.instructables.com/id/PWM-dimmer-using-NE555-and-MOSFET-with-DIY-alumini/ but its kinda different,i used irf530n and ne555p ic,
And when i connected all of the components with a 12v source it happens nothing except that little spark comes on gnd with adapter?
Help please ?
Discussions
2 years ago
What are you kind of light are you dimming ? some will not dim.
As far a mosfets did you notice the ible lists an IRFP510 BUT the schematic is an IRF530 all begin conduction at VGS = 4.5V including your IRF530n..
They are all 100v and different currents..
The mosfet has no bearing on the operation of the dimmer, neither is the version of the 555...
I think the dimmer schematic in the ible is Wrong click on this one to see the whole image.
Answer 2 years ago
How much current can support pwm dimmer or ne 555 so it doesnt get fried?
Can i put a 12v 2.5A source on input channels ?
Answer 2 years ago
so your saying that i have wrong components,oh well lol.
But what do you think about this one:
https://www.instructables.com/id/Simple-555-PWM/
Answer 2 years ago
No, he's saying the parts you have have "no bearing" on the problem, which means they aren't the problem. Iceng thinks the schematic is wrong.
Answer 2 years ago
+1
John may have a wiring error.
Answer 2 years ago
wiring eror ? okay? but i follow the schematic and nothing,can you tell me mate were am i wrong ?
Answer 2 years ago
The schematic is most likely fine, tested it in LTspice.
Answer 2 years ago
I used my ckt to run a Lionel train to slowly creep into a station.
I trust working hardware more then LITTLE Spice..
2 years ago
okay ? today i rewired it again on pcb board and it didnt work i real dont know,so i gave up and started a new one: motor pwm you can find it http://www.talkingelectronics.com/projects/50%20-%...
ANY suggestion and advices would be gladly welcome
2 years ago
A) Check your MOSFET, make sure it's working properly. There should be no continuity between gate and any other pin. You should be able to control a load with the transistor no problem.
B) Check the 555 timer, wire it up in astable configuration (google) but set it to a lower audible frequency (555 calculator for R1 R2 and C1) and connect a capacitor in series with the output (47uF or whatever) to a speaker or headphone and try to hear squeel, buzz, or series of clicks (depending on the frequency set)
C) rewire it the way the schematic shows and try again. Make sure you are using the correct value components, the diodes are connected the right way, having an oscilloscope or at the very least a multimeter helps a lot.