polymath said:Hi szlovak
I do not think Alan69 has tried his own suggestion.
Alan69 said:polymath said:Hi szlovak
I do not think Alan69 has tried his own suggestion.
I use it all the time, but of course on normal inputs not schmitt trigger.
I don't use PIC24, but assuming it's inputs are schmitt trigger too, I would try dropping ICD to 4.1V and inserting just series resistors into the lines. 4*.8 = 3.28, and backwards 5*.8 = 4, so you should be able to talk to both 3.3V and 5V targets without changing, let the resistors and input diodes take care of the rest. Have the ICD and targets right in front of me, I'll try it in just a little and make sure it's good, could be handy and almost no extra parts..
... from you removed post.lame crap
polymath said:Alan69 said:polymath said:Hi szlovak
I do not think Alan69 has tried his own suggestion.
I use it all the time, but of course on normal inputs not schmitt trigger.
I don't use PIC24, but assuming it's inputs are schmitt trigger too, I would try dropping ICD to 4.1V and inserting just series resistors into the lines. 4*.8 = 3.28, and backwards 5*.8 = 4, so you should be able to talk to both 3.3V and 5V targets without changing, let the resistors and input diodes take care of the rest. Have the ICD and targets right in front of me, I'll try it in just a little and make sure it's good, could be handy and almost no extra parts..
Hi Alan96
So I was right - you have NOT tried it on 3v3 devices - re: thread name.
Having to change resistor values for each Vdd is NOT an acceptable design.
As you do not have a PIC24 device - try with 877A externally powered at 3v3 or even go to 2v0 - still within programming spec. ICD2 can do all serial PICs at all voltages.
9 res + 6 trans = 36 holes = high production cost + mega error opportunities.
regards ... Polymath
I think NASA may have said this just before the explosion!Alan69 said:Again, it ONLY needed testing to make sure.........
Curious - anything? sounds like precision engineering!Alan69 said:Clear from the circuit it'll do about anything.........
36 holes x 100k products - na not much .... NOT! A MAJOR cost of any PCB production is Holes - fact.Alan69 said:Holes are free where I buy PCBs, not that much for 36 even if you pay. Plus no holes for a buffer chip, not like it's that many more
I have built one using resistors and smt - You may have noticed that smt do NOT need holes.Alan69 said:I take it you didn't build it before deciding it was too much..
potyo said:Hi
Please test it at 2V! The original icd2 works with 2V targets.
You can find it in this topic:ADRENALIN2003 said:Ok can we summ all this? Can anyone post link to sch of original ICD2, and to clone which can work with all (3v3) PIC devices?
IamnotJunk said:Is it possible? Clones most likely doesn't have a voltage regulator outputs.
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