http://tech.groups.yahoo.com/group/Show-Control/ The Show Control Mailing List Wed, 02 Jul 2008 04:05:27 GMT Jerry Durand http://tech.groups.yahoo.com/group/Show-Control/message/12833 http://tech.groups.yahoo.com/group/Show-Control/message/12833 ... I have 0402 in stock, the 0201 resistors are pretty much machine install only, REALLY hard to hand solder. ... For this week, I'll use the pre-installed Wed, 02 Jul 2008 03:28:36 GMT jdow http://tech.groups.yahoo.com/group/Show-Control/message/12832 http://tech.groups.yahoo.com/group/Show-Control/message/12832 If you are equipped to try it play with 1/10th watt surface mount resistors with some #30 or so leads tacked on. They'd have very little mass to heat up and Wed, 02 Jul 2008 02:54:44 GMT Alan Edwards http://tech.groups.yahoo.com/group/Show-Control/message/12831 http://tech.groups.yahoo.com/group/Show-Control/message/12831 MIDI Knobhead...Hey! I resemble that remark! But, thank you, Richard for locating this. These folks have taken over the PAVO line of MIDITools. PAVO Tue, 01 Jul 2008 19:40:24 GMT Richard B. Ingraham http://tech.groups.yahoo.com/group/Show-Control/message/12830 http://tech.groups.yahoo.com/group/Show-Control/message/12830 Just in poking around the web, I also found this. http://miditool.com/index.html Thought it might interested the real MIDI knobheads out there. :-) Richard B. Tue, 01 Jul 2008 15:25:16 GMT Jerry Durand http://tech.groups.yahoo.com/group/Show-Control/message/12829 http://tech.groups.yahoo.com/group/Show-Control/message/12829 ... A 1/8W carbon film (Xicon brand from Mouser) 100 Ohm across the T-handle blasting machine (250V) makes a fireball an inch or so in diameter. On my Tue, 01 Jul 2008 08:59:38 GMT Clive Mitchell http://tech.groups.yahoo.com/group/Show-Control/message/12828 http://tech.groups.yahoo.com/group/Show-Control/message/12828 I'm not sure if too much current would just blow the resistor clear too fast. It is a bit slow, but it's also a LOT cheaper than an ematch. No good for Tue, 01 Jul 2008 07:45:08 GMT Bill Nelson http://tech.groups.yahoo.com/group/Show-Control/message/12827 http://tech.groups.yahoo.com/group/Show-Control/message/12827 ... What would happen if you either increased the voltage to 24 V or reduced the resistance to 5 ohms? Would the current be so high that the resistor just Tue, 01 Jul 2008 07:31:27 GMT Bill Nelson http://tech.groups.yahoo.com/group/Show-Control/message/12826 http://tech.groups.yahoo.com/group/Show-Control/message/12826 ... I will be doing the local show. I don't know what we will have, but it will be some mix of cakes, candles and 3" through 6" shells. Bill Tue, 01 Jul 2008 00:23:02 GMT Jerry Durand http://tech.groups.yahoo.com/group/Show-Control/message/12825 http://tech.groups.yahoo.com/group/Show-Control/message/12825 ... Yes, a bit late. This was an application note in Electronic Design from a manufacturer suggesting ALL op-amps are like this. I don't have the application Tue, 01 Jul 2008 00:19:19 GMT Jerry Durand http://tech.groups.yahoo.com/group/Show-Control/message/12824 http://tech.groups.yahoo.com/group/Show-Control/message/12824 ... I have a blasting machine (a 1950's T-handle one in really nice shape) that puts out 2A @ 250V for long strings of blasting caps. REALLY impressive to put Mon, 30 Jun 2008 23:39:59 GMT Matt Botherway http://tech.groups.yahoo.com/group/Show-Control/message/12823 http://tech.groups.yahoo.com/group/Show-Control/message/12823 I was thinking its a bit slow too, when compared with an e-match. Have you tried maybe a 1ohm resistor, or other option maybe a 1/8w resistor? Matt _____ From: Mon, 30 Jun 2008 23:33:06 GMT Chris Hubbard http://tech.groups.yahoo.com/group/Show-Control/message/12822 http://tech.groups.yahoo.com/group/Show-Control/message/12822 Hi All, Perhaps I've come into this thread a bit late, but have you considered simply replacing the offending op-amp with a more robust one? Most modern Mon, 30 Jun 2008 22:57:41 GMT jdow http://tech.groups.yahoo.com/group/Show-Control/message/12821 http://tech.groups.yahoo.com/group/Show-Control/message/12821 It appears there is a significant ignition delay. Does it work if you put mains voltages across that sacrificial fuse? {^_-} ... From: "Clive Mitchell" Mon, 30 Jun 2008 16:16:18 GMT Richard B. Ingraham http://tech.groups.yahoo.com/group/Show-Control/message/12820 http://tech.groups.yahoo.com/group/Show-Control/message/12820 ... No, but that's OK. :-) Unless you want to count Sound Engineer I guess, but that's a job title that is.... well.... kinda BS in most of the circumstances Mon, 30 Jun 2008 14:57:30 GMT Kevin Gross http://tech.groups.yahoo.com/group/Show-Control/message/12819 http://tech.groups.yahoo.com/group/Show-Control/message/12819 We're all engineers here aren't we? You all please let me know if this is getting a bit too tweaky... Agreed - voltage alone doesn't kill. But it doesn't take