Finally a good reason for shadowing the TRIS registers. As I read the notes on TRISB, it's better to use always shadow registers on the TRIS registers. Stef...
... I can't make any sense of that section. What is 'the data direction state *on the port pins*'? There is no direction on the port pins, only a level. And...
... OK, I get it. When a peripheral is activated this will (in some cases) override the TRIS setting. In that case the value read from the TRIS is the value...
... But only in the rare case when you activate peripheral, make some RMW operation no the tris register and then deactivate the peripheral. After this...
Snail Instruments
snail@...
Jun 1, 2005 9:52 am
19503
... Indeed. Rare cases tend to take up a disproportional amount of debugging time, so IMHO it is worth the effort to shield you from those rare effects. Wouter...
... using ... for ... Dave, 1N5819 is a schottky diode 1A and only 40V. Not very indicated for 12V/24V steppers with heavy load where the spikes could be more...
... I don't see how. For a unipolar stepper the power is applied to the coil, with the diode blocking (non-conducting). The maximum voltage is the power...
... voltage is ... An ideal diode, of course. A real diode will need some time till switch. Time in which the voltage on the coil could increase higher than...
... can ... I don't know if this is a stupid idea or not-- for some high-voltage power supplies for amateur radio, we used several diodes in series. We also...
... This is very much worth further discussion. For an ASCII schematic, I would recommend AAcircuit: http://www.tech-chat.de/download.html site is in german ...
... For higher voltage use ordinary (not Schottky) fast recovery diodes, like BY199 and similar. Josef...
Snail Instruments
snail@...
Jun 2, 2005 7:33 am
19513
Hi If your using an optically coupled triac you will need to use phase angle control to set the lamp brightness. This means that you monitor the mains AC...
... an ... smaller ... can ... I have used some BA157 or BA159 which are not schottky but are very good and huge reverse voltage up to 1000V. If the stepper...
Guys, help me. From some obscure reasons I can't ask questions to the piclist, I can only answer. Even I change an existing subject topic does not work. I need...
... Amen! The L298 will fry too. ir EE van Andel eur@... www.fiwihex.nl Fiwihex B.V. Wierdensestraat 74, NL7604BK Almelo, Netherlands tel+31-546-491106...
sent xxxxxxxxxx Your message entitled [EE] NTSC tuners was successfully received by the Piclist mailing list. xxxxxxxxxxxxxxx To: Microcontroller discussion...
Hi there, For a project I need to use IR communication. I just wanted to start trying to build a simple transmitter. Maybe it is possible to create a simple...
Hi The data sent via a tv remote control is modulated at 38 KHz . This means that the led is at 38khz then the pic output wil turn the pulse on and off....
... Make that 'can be'. In fact all frequencies from 30 up to 60 kHz are used, and on top of that there are a few more rare remote control techniques that use...
Hi there! Thanx for your replys. But maybe I should've written my message a bit more clear. I'm really new to al these electronics stuff, and I just want to...
Here: http://oase.uci.kun.nl/~mientki/pic/projects/pic_ir.html they show a schema for a IR-sender, which can send using the USART of the PIC16f628. I'm...
... Greetings, OK, here is a "string" of 4 diodes. Each diode has 1 resistor and 1 capacitor connected in parallel with it. Now, let me see if I can find a...
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