Andy/ Derek, Fear not I shall join in the testing although I'm currently focusing on building a Stan Meyer cell to the same specification as Scott Cramton. I...
Wonderful, I should soon have all the details on how to modify the courtiers town circuit board; hopefully having it run at 1MHz without getting too hot; I'm...
Yeah, let me know too.I use the High power version of the couriestown circuit.not sure if that makes any different.though I do have the low power kit I haven't...
The 555 has a high time t1 and a low time t2 given by: t1 = 0.693 (r1 + r2) c t2 = 0.693 r2 c So for the Couper circuit with r1 = 470 kΩ, r2 = 22 kΩ...
I thought to first try: r1 = 180 k Ohm;, r2 = 10 k Ohm; and c = 27 pF to yield: t1 = 3600 nS t2 = 190 nS this would be 270 kHz operation, and not the full 1MHz...
All my resistive calculations were based on a resistive on-time of 200 nS and some people might be wondering where this figure came from. The answer is from...
Andy, Tried this with R1 at 180k, R2 at 10k and C2 at 33pF. Didn't rig my scope up as I ran out of time. I used an LM555N which seemed to be still working. I...
Very, very nice... Acceptable temperatures, and I am looking forward to knowing about the oscilloscope plots; the voltage bounce, frequency, etc. I need to...
I'm a little surprised your LM555N can manage the 270 kHz, so maybe it is lagging a bit; the TLC555 is not so expensive, so might be worth a try. My prototype...
Try this link http://f1.grp.yahoofs.com/v1/IKn7Sc2Fb4K4_HgfeS5sJcZaH8Te9wABXxQAZvt8JA-VImRYQYQCKXgcrgkN-rEvdomlpjuao0aYlNF21ey6usuJTQ2krn-nblDK/pulse2.pdf...
... Thanks! That works for me. A question on figure 1 in that document: It looks like the peak voltage of the inductive pulse is < 1.5 volts. Is that...
The problem is that recovery times are often measured in months, so who has that sort of time? Hence the drive for a potentially faster approach (resistive)....
The problem is that we still don't know what is needed. * Does one just need a minor over-voltage to break bonds? after all, one only needs a 1.5V over-voltage...
The small over voltage has nothing to do with it (a big spike...like 120v or so ca n break the crystals that have bridged plates)...I believe its the specific...
Yeah, I wish one could edit ones messages (as on a lot of forums). I keep on adding messages, when all I want to do is add comments. Since my own TO220...
... Since 33pF seems more common than 27pF, might as well base the design on this R1 = 180k R2 = 10k C = 33pF this yields high time = 4350 nS low time = 230 nS...
Lets says one starts with the Couper circuit The 'laziest' approach is just to swap out the timing capacitor to 10 pF; one then has: R1 = 470k (untouched) R2 =...
Another strength is that RadioShack has a kit http://www.radioshack.com/product/index.jsp?productId=2062375&retainProdsInSession=1&numProdsPerPage=60 that is...
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