to filter the list of filenames (or choose a file type from the List files of BS Transistor, TMOS FET switching. Motorola. Q1, Q2. MFBK “Typical” parameters which may be provided in Motorola data sheets and/or specifications . I’m considering either a MOSFET like a BS or a BJT like a 2SC Which would be lower noise I may be just overlooking it when I look at the datasheet but I don’t see it. I’m using a signal File Type: jpg, DSCF Hi there, I’m searching for a complementary low power mosfet pair for File Type : jpg I prefer to match Rds(on) and of course Yfs/Rds from the datasheet. #2 is BS and BS which has comparable small capacitance.

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A bit beyond my skills. That is good stuff. If I have a load of 20 amps then with a. I’m using the Dalls 1 wire temp sensors for the two heater temp channels and the DHT22 for ambient temp and humidity.

Originally Posted by mswhin Find all posts by mswhin The longer the FET takes to switch from off to saturated the more power is lost.

Last edited by Garbz; at I am working on a project in which we are using a LMP Oh well I guess not. So much simpler than dealing with low-value shunt resistors. Overshoot and ringing are a side effect of a crazy fast switching response which is usually the result of wanting to waste as little power as possible in the MOSFET.

Some of the development boards I have a super powerful and nice to program plus unusually cheaper than Arduino. Simply adding 2 doubles takes around instructions. So the best platforms are high speed 32 bit processors now.


2n datasheet & applicatoin notes – Datasheet Archive

I understand the issue more clearly, for sure. One disadvantage I found which will have an affect more on Arduino platforms is the integer based calculation quickly use up 8, 16 and 32 bit integers. While these are low on rds there are no small packages for this family. I need to get to the bottom of pwm frequency – resolution seems bd170 explanatory.

If the load get to high, I would shut the ouput down. Originally Posted by mswhin63 Another really really cool platform is the PSoc4 platform which as a brilliant IDE that is component based and I believe super easy to develop. Last edited by wasyoungonce; at Originally Posted by Garbz For efficient code you want to as avoid using any floats single or double which means no riletype places and avoid performing any math which results in datashwet division that has a decimal place.

This may eliminate the ringing even without a snubber. I will consider this as a possible option after completing this semester. The All Things to All People controller.

Gs170 few options are writing a subroutine with a series of delays, or using one of the pulse width modulators with a really slow clock cycle which can always be slowed down further by counting in a loop i. A double is still a float, just a double precision float is 64bits long instead of 32bits. AndrewJ Watch me post! fiiletype

Originally Posted by Garbz It looks good but it’s not available from my usual sources for components either. I am not really interested in the Beaglbone though. Cant think of the part number at the mo but I’ve used in the past and work well up to 60amps. Hi Garbz, On my tiletype, a 10″ LXGPS, I have the dew heater just behind the corrector plate which appears to be the best location, and the idea is that the heat going into the tube and slightly heating the back of the corrector plate, airstops the dew from forming on the front.


BS170 MOSFET. Datasheet pdf. Equivalent

Originally Posted by rcheshire. A correct snubber can help. The idea of putting the temp sensors under the dew straps, I picked up from lots of searches in astro sites looking for commons in temp sensor positions and under the dew heater seems to be the most intelligent things I read. Also some plastic RCA connectors have exposed parts of the shield. Power dissipation is critical as I was targeting a SOT package. Up to 30A in an SO-8 package. Find all posts by Garbz. Very nice project Chris.

I generally use bs710 output stage Mosfet RdsON as the shunt Should be trivial to change: I was amazed the amount of code required to do floating point calculation compared to integer based calculation.

Alain PS ; and like that??? Also I’ve decided to drive the relays via an I2C port expander. This may not work.