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1000 Threads found on edaboard.com: Fan Triac
I'm trying to design a self contained DC bus power supply. Specifically it's for a 400v 2200w AC servo drive. Trying to get this all down on 1 PCB for simplicity. I've been using this drive for some time with just 240v mains rectified to 340vDC and some filter caps. The inrush current on charging the caps from flat is rather large, Which for a whil
I'm (barely) curious why you "need" to use inferior technology. If I had to guess, I'd guess this is a school project and somebody else gets to set the boundaries and criticize the BOM. Your easiest regulator will be a zener + (N) forward diode stack, followed by a Darlington NPN pair. You can find zeners in pretty fine-binned breakdown voltag
DC motor maintenance usually requires: 1. Environmental conditions for DC motor use: (1) In the room where the motor with protection level below IP23 is installed, no water vapor, acidic or alkaline corrosive gas, or flammable gas such as gas, and dust and other pollutants must be invaded (2) When continuously working under rated load, the maxim
Hi Recently working on an Arduino based AC heater controller, I have been facing some unusual problems with MOC3020 and triacs BTA136 or BTA41. Attached, please find the schematic and the completed PCB. Initially, for testing, I connected an incandescent bulb across heater terminals and connected the FIRE pin to 5V. The bulb lit fine. A
Hello There, Hope this post find you well. May be or may not you would love it, because this issue has reached huge number of problems. Someone could say "school project for infants". I was trying to build a SOLID STATE RELAY with zero crossing switching. Similar to this product,
Power supply repair is usually electrolytic capacitor replacement. Or maybe MOV and fuse replacement if it got taken out by a transient. Or maybe NTC replacement. Or fan replacement Or optocoupler replacement. Possibly power fet replacement if it was in severe temperature variations (bond wires snapping due to severe expansion & contraction)
Hi, I have been trying to use Snubberless triac from ST like T1635 to turn on Lighting, fan loads, and they work fine, however availability and price has been a problem, Is there a different manufacturer who makes similar triacs, and 2A load capacity would be sufficient. Need to avoid snubber circuit as I do not want live wire at (...)
Thanks, if not being paralleled, then what generally do you take as being the maximum power dissipatable in say a DPAK FET on a 2 layer FR4 PCB with no heatsink, and with it just having thermal copper surrounding it up to 1cm all round, and the bottom layer copper mirroring this area, with thermal vias interconnecting? (1 oz copper on PCB, 1.6mm t
Induction motor has almost load independent speed and doesn't need speed regulation in usual applications. If precision speed regulation of induction motors is required for some reason , you'll use an inverter variable frequency drive (VFD), preferably with tachometer or - less accurate - with estimation of actual shaft speed. triac (phase
Hello We need an offtheshelf offline PSU. The spec is as follows? -------------------------------- 200 to 400w output (anywhere in that range) VAC input = 100-265VAC Vout = either 12V or 15V or 24V No fan Metal casing so it can be screwed to a metal enclosure for thermal management. Fully enclosed , but only to IP51 rating. Dimens
Now i have working prototype on breadboard, but i'm not sure in RC Filter. It's really needed?With regard to RC filtering, it would actually have some usefulness to reduce the generation of harmonics due to PWM switching on a typical reactive load like a fan, but that would make sense only if the control were by analog variation of t
1. The principle of operation of a hair dryer The hair dryer also has the same working principle as the electric kettle, electric stove, ... When powered, the resistance will be heated. At this time, the fan functions to blow airflow through the heating coil. Therefore, the air heated by resistance is dry hair. The chromium and nickel materials
1. The principle of operation of a hair dryer The hair dryer also has the same working principle as the electric kettle, electric stove, ... When powered, the resistance will be heated. At this time, the fan functions to blow airflow through the heating coil. Therefore, the air heated by resistance is dry hair. The chromium and nickel materials
Hi I have an enclosure with a 30vdc power supply inside. I would like to add some fans to keep things cooler inside however its much simpler to buy a 15vdc fan than a 30vdc fan. So I figured if I connect 2 in series I would split the voltage and bob's-your-uncle as they say however a friend of mind pointed out that it might not be (...)
So what would be the downside of just replacing the fan's power source with direct +12V, presuming these are the usual sort of brushless fan, only fed a controlled voltage? Noise, power consumption, I think these are "don't care" (fans are single digit watts, you probably run a 500W power supply, are you really going to quibble?). (...)
fan-in other than 1 is only occuring in special cases where a pin is directly driving multiple internal gates without buffer. If you read the books thoroughly, you'll notice that fan-in has much less general importance. Particularly it's no performance parameter.
I wanna use it to dimming dc bulb or LED using mosfet or transistor instead of triac on GP0
hello to all .. can anyone please help me I'm beginner in pic programming . :oops: this is a dimming ir light circuit . it use a p12f629 and triac to controlling ac bulb can anyone please help me to use it to controlling a small dc bulb instead of ac bulb 155656[/ATTACH
"We"? I've done it (decade or more ago, 800MHz PECL clock recovery). Made 8 phases from the single incoming, with the non-quadrature ones by interpolation as you say (comparator, forget it - inverters were all that could hang with that clock in 3.3V RF SOI CMOS). That said I'm not a fan of how the interpolated phases degrade edge rate (@ the RC
Hi guys, I am having problem with triac conducting. In attached schematics triac should control current through R1 by turning potentiometer. I found somewhere on the net schematics and i thought it will work, I dont have to much experience with triacs so i would like to hear youw suggestions. And I am well aware about position of pins (...)


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