Discrete ("Not joined to or incorporated with another; separate; distinct.") components means no integrated circuits. KDNenakh is quite correct in his terminology.
where im from, discrete semiconductors means no PIC micros thanks for the dictionary, ive only been speaking english for 17 years
theshadow27: the discretes: The shop has only got discretes (as listed in the list of discretes of DesignWorks), as far as I know... though, there are some add-ons, like my soldering device, lol... I haven' t found chips, and everything is in boxed behind the bar... He' s just not nice enough to ask him, lol... about the PIC-chip: I was talking about the chip, not the LED-Display, I' m not that much new in this, lol... I tried messing up things before this... hehe
Generally you'll find (over here in the UK anyway) separate sections in electronics catalogues for discrete components (transistors, diodes etc), semiconductors (ICs) and micros (PICs, AVRs, DSPs etc.)
theshadow27, thanks for the link, it' s a neat tutorial... and for that discretes, as well as other devices, I go from what DesignWorks keeps apart, to look from of...
To my idea, the sample board is a little too spaced here and there... if the tool's always doing that, I believe I rather design it by hand... I can draw pretty well, and there' s always a chance on removing too much-being ink... I don' t get some parts of it, due to lanugage difference, but that' s okay, I get the idea by the pictures and most of the remaining text...
Okay, this is what I got so far... my fan controller, values to be added... They' re always in the way of my design, so I leave them out for a while... left is the main controller (on/off and display spd/volts/tmp)... right is what connects to it, this is four times a volt meter, the digital point is added in the selector, only when volts are displayed... the temperature is in °C, but can be switched to °F in the main broadcasting case (other, not designed... still in need of details, before I do) Hope you can manage this, lol... here you go: http://www.howlingwolfcompany.com/temp/FanController.jpg EDIT: -IMG tag not working, as in the other boards- I hope I' m right on using the transistors as switches, like they shew in the tutorial... I still need that one-two switch thing in one button, though
If you have problems finding parts in Belgium, I can recommend Futurelec, they'll ship world-wide very cheaply (even compared to cross-UK delivery charges) and prices are good. In the UK, keep the order under US$30 (£18) and there's no VAT or other duty to pay, so check the Belgian position.
i don’t even know where to begin. where did you get that? and if you drew it, your going to have to start from the beginning because it is crazily convoluted and has an almost 0% chance of working that whole thing on the left, what is that for?? i assume the thing on the right is an MCU for counting the pulses and for displaying on the LEDs, but you have it hooked up to display "XXX.1", and have not included the common cathode which i assume, since every led has its own MCU pin, are grounded. you also have omitted resistors between the LEDs and the MCU, unless I’m missing something. and all the RC networks under the chip, are those for timing? because its probably not going to be accurate enough for RPM. you will need a crystal or something. can you split it into separate parts, and explain how you want each one to work, before you put them all together? err, yes and no, but in your case, probably not. "one-two" switch is called DPST, they do sell them
The datasheet for this A/D Converter can be found here: http://www.intersil.com/data/fn/fn3082.pdf The display is connected to give 200mV FSD - i.e. 199.9mV - so that's ok, the resistors and capacitors underneath are as per the typical application for this IC, so that's ok. I have no idea what is going on with those transistors though!!! Some base resistors would be useful for the transistors also once you've got them sorted out! It seems like you're possibly getting the Emitter and Base the wrong way round, but I cannot tell. Out of interest, how do you plan to turn your RPM reading into a 200mV scale?
I' ve been re-designing and overlooking the thing for 4 days... as for the transistors, I know I should place them in the other directions, because they point from GND to positive, not normal... The entire circuit, to me, looks okay, but what do I know...? They told me that if you put a positive current into the B-pin of the transitor, it switches either open (NPN) or closed (PNP)... For the thing on the right side, that' s a volt meter, put to (-)19.99V... still to caliberate, I know... --- EDIT --- The thing on the left, is the converter, it' s a connector for all 4 fan display/control panels... it manages the display statuses, too, displaying either temp, volts or speed... If it displays volts, it had the DP on, else off... And the other two values are converted into voltage readings... for (-)1999 volts (actually (-)19.99 without DP) --- EDIT --- currently I' m redesigning the control panel to have the temp/spd reader included, using transistor switches, and adding pins for the positives for those transistors to the main connector --- I' m firstly designing, then learning and then re-designing my errors out... for the one-two switches, I ment the optionary switches as in the fan controller/disabler I' ve seen somewhere earlier, posted by theshadow27... Further, the pins are all male, because the cables aren' t included, they' re separate boards/circuits... Also still to overlook... I need to get the thermometers in there, too... These are just display boards, however, because the main connections run towards the main separator device, that controls both the indicators, as controls, and a separate two switchboards... One for the PC/Audio/Fan/Ventilator, etc controls, and one for the light... I could show the design of the panels, but they' re not finished either...
A few notes: I assume you know that you'll need an additional potential divider to change the scale from what is currently 200mV? You need +/-5V supply for this circuit - are you able to source the -5V supply? I suggest you read the sticky at the top of the electronics forum. A transistor does act like a switch, but not quite like the kind of switches you're used to. Current flow is unidirectional, and it's position in the circuit also affects the way it works (like a switch or voltage follower). I see you have an LED connected backwards to the base of one of the transistors, what's all that about You have a transistor connected the wrong way round on the -ve supply to the IC (pin 26) but I'm not sure what you're trying to achieve with the combination of that transistor and the one above with the LED on the base For us to help you further you need to show what each of the pins on the connector is for.
Despite rumours to the contrary, BJT transistors are voltage-controlled, by the potential difference between base & emitter. That lets (or stops) the current flow.
Working on a little more accurate and readable schematic... Remember, I work compact, so you' ll really need to trace them, I don' t wanna waste space on my plan... For the transistors, they' re in the wrong direction, they need to be turned around, facing the other way...
I didn’t realize what it was, and I did not have time to look it up. That makes a little more sense, but it seems like the most indirect way of doing this sort of thing okay, i was going to say, you cant exactly mesure RPM with a volt meter so to add to the mix, you’ll need a FV chip, as well as an accurate way to scale the temp sensor into a 200mV range err, what? I posted no optionary switches… if you mean analogue switches from the book of old circuits, a replacement can be found http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1518/ln/ I must say, with those transistors/LEDs you have me totally confused. Ill be waiting for the next schematic… but im getting a headache thinking about this lol
Yes yes, resistors and others to come, but still... much work...For the rest, there' ll be labels for the inputs, too... so you can get it a little better... theshadow27: one of the fan-control circuits... unless you' re not 6D617474...
Exactly what I thought, when I re-searched it... I still do have the hosting site... http://www.acrim.co.uk/pictures/
