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Dave, I've used an RCA plug for 12 Volt power off of a sealed lead acid battery, to run a telescope motor. It hasn't given me any trouble that I know of, and I have used it in temperatures down to

Thanks Stefan. That's a neat little circuit and not a PIC in sight. I happen to have a project in mind that will use a simulated keyboard input to control a PC programme. I was about ready to

what about a rf amp? <rtellason@b...> wrote: (literally and something I make the at very low

The file uploaded <http://groups.yahoo.com/group/Electronics_101/files/Stefan_Trethan/> is the schematic. It works without any complaints... I don't really use the leds, not that i remember. I disable

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Electronics_101 group. File : /Stefan_Trethan/two_kbd_one_pc.gif Uploaded by :

Stefan, I was about to write to tell you how much better my PIC idea is because it would light up LEDs on both keyboards - and then I read that one is wireless, so I'll keep quiet. I don't think my

first no question is stupid and second most cable convertors use radio frequency signals the opto's would just disconect the unit the convertors actualy use somthing like a modem that sends a signal

you didn't say what its for. power or signal? what's the minimum rating? push button? rocker? slide? pcb or panel mount? Mouser has 80 pages of switches. I'm sure you can find much less $$ switches

Hi all, I'm in the US and am looking for a simple SPDT switch. Digi-key want $6.22 for one switch. It seems that a simple switch should not cost so darn much. It is a right angle switch so it is not

figured the POST & windows problem out... Peter, put away the pic and get two npn transistors (or fets). the original four diodes, two transistors, and two resistors (for Base resistor) are all you

wrote: Yes. Probably fine for your purpose. I would not put it back in a TV or monitor and expect it to work, but for experimenting with high voltage you won't be running it at anywhere near its full

I do like simple solutions you know.... However you are right in one point, it is bad that the other direction doesn't work. No problem with POST, i told the bios to keep quiet if the keyboa

4 doides huh? Personally, I would have used a PIC and 6 open collector driver transistors, used a day to programme it to split the signal from the PC to both keyboards, collect data from both

Done... Sorry for wasting your reading time, but i didn't expect it to work so easy. i simply used 4 diodes, allowing the keyboards to pull the lines low but not allowing the pc to do so. As expected,

Hi all! Have two keyboards and two mice and need to connect them all to a pc running XP. No problem with the mice, the second goes on the com port with no problems... The pc has a ps2 for mouse,

I have see such converters so it should be possible. one question, why don't you print to a serial port also and plug the serial device there? There is loads of stuff turning up on a google search

Hi All.. I would like to know if its possible to convert a PARRALLEL signal from a LPT port from my PC to Serial. The application is that I have a program that prints to an LPT port but I would like

Thank you so much for the recommendation. That sounds like a lot of fun! Great for a high-impedance/high voltage load :) Best, Scotty

Hi everybody I just joined up yesterday. I am also interested in home built lasers in the cutting and engraving application. My other passion is woodworking. I hope to meet many pros from who I can

Just recieved ten Piezo film sensors (LDT0-028K from Measurement Specialties, Digikey part # MSP1006-ND. <$2 each! The basic idea behind getting these is making a (crude) vibration measurement device