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  1. Old Steve

    Help with FPC contacts

    I wish everything was that easy to find. It's even in Leon's country. It's an old pdf, though, so hopefully they still stock them.
  2. Old Steve

    Help with FPC contacts

    Try these guys:- http://www.servoconnectors.co.uk/ That particular connector is listed in the index on page 2 of this pdf from the same website, with details on page 22:- http://www.servoconnectors.co.uk/pdfs/2008Product%20Guide.pdf It took a 30 second Google search to find it. Google is...
  3. Old Steve

    hi-fi audio signal booster- RCA input connections - how to wire the "shield" ??

    About all I can think of is keeping the supply and signal tracks separate all the way from the power supply to the output, decoupling the supply well with caps as close as possible to the components, then connecting the shield to the supply negative and not the signal negative. Still hoping an...
  4. Old Steve

    Need help powering a 12V vehicle video monitor from 5V

    Adam, the DC-DC converter listing says 'up to 1.4A'. Allowing for that being the absolute maximum output current, you can bet that's at the absolute minimum output voltage. ie 2.5V So, 2.5 x 1.4 = 3.5W 3.5W / 12V = 290mA All of these sellers tend to exaggerate, so it probably can't really...
  5. Old Steve

    hi-fi audio signal booster- RCA input connections - how to wire the "shield" ??

    I have little or no audio experience, but... Have you tried with the shield disconnected altogether? Sounds like a ground loop problem. Duh. I'd go with the good ol' trial-by-error method. Try each method in turn and see what works best. Can you do that 'in-vehicle' with longer leads, without...
  6. Old Steve

    Mind & Infra Red Controlled Robot Car

    That Neurosky kit works out at AU$186.42 at the moment, with AU$34.40 delivery. :eek: I might sit on my hands until our dollar recovers a bit before considering buying one, if I buy that type. I read somewhere that the Mattel Mindflex headset works well too, and second-hand they're relatively...
  7. Old Steve

    Arduino vs raw PIC, Atmel etc

    Thank you for the welcome hevans1944. I'm already addicted to these forums. Great place. And yes, I'll replace my profile pic when I get a chance. I still have the moustache, I've had that since my early 20s, but the beard was just a trial over Winter. More trouble than it was worth to take care...
  8. Old Steve

    how can I create a positive logic pulse from a steady high input?

    Looking good. Well done. That shouId do the job nicely. :cool: I'd personally put a protection diode across R5, though, with the cathode connected to Vcc, just to prevent potential damage to U1a from over-voltage when pin 4 of U1b returns high. The C1 / R5 junction will momentarily rise to 12V...
  9. Old Steve

    how can I create a positive logic pulse from a steady high input?

    You're waking up and I'm falling asleep. It's 12:17am Saturday morning here. One last cuppa and off to bed for me.
  10. Old Steve

    how can I create a positive logic pulse from a steady high input?

    Yeah, right, I forgot about the LEDs. :oops:
  11. Old Steve

    Help with C code or windows 7 cmd prompt pop up box

    getch() should work fine without the need to do an fflush() Execution will pause at the getch() until any key is pressed, and then the console window will close immediately. conio.h may still be needed, though. In my DevC++ IDE it wasn't, but I think that with others it probably is. I haven't...
  12. Old Steve

    Help with C code or windows 7 cmd prompt pop up box

    I just tried the alternative, using getchar(). It does need an 'Enter' press. And although it should work, I get an error when I try the system(pause) method. "Windows cannot access the specified device......." (First my anti-virus claimed it was a Trojan)
  13. Old Steve

    Help with C code or windows 7 cmd prompt pop up box

    I just wrote a quickie to check. getch() does what is wanted. Doesn't appear to need conio.h like I thought, though. The other method is:- system("pause"); #include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]) { // system("pause"); getch(); return 0; }
  14. Old Steve

    Help with C code or windows 7 cmd prompt pop up box

    Yes, but doesn't it also need an 'Enter' press? I may be wrong. getchar() prints the character on the screen whereas getch() doesn't. getch() doesn't, but it needs conio.h. getch() isn't in stdio.h
  15. Old Steve

    Help with C code or windows 7 cmd prompt pop up box

    This is straining my memory a bit, but I'm pretty sure that I used to use getch(), along with the 'Press any key' line as mentioned by Harald. I can't for the life of me remember why getch() was a better choice than getchar() though. Maybe it isn't. I just had a look for my old collection of...
  16. Old Steve

    Capacitor Questions

    Glad to help, and feel free to ask for assistance anytime. Pity you're not closer. (I do this for the same reason these days - on a disability pension and need something to keep me active. This stuff is great for the brain. Helps ward off Alzheimers too, I believe.)
  17. Old Steve

    Programmable Resistor suggestions?

    Here are some others to check out, with 4 times the resolution of the CAT5270. These have 1024 taps, instead of 256:- http://www.maximintegrated.com/en/datasheet/index.mvp/id/4730
  18. Old Steve

    Programmable Resistor suggestions?

    No problem, glad to help. I figured that basically a micro with A-D and an op-amp or two for sensing could probably control a digital pot to do what you want, provided the digital pot has good enough resolution. Also check out Xicor for digital pots, if the CAT5270 isn't suitable for your needs.
  19. Old Steve

    So I missed a memo.....or three or four

    Thank you Harald, I'll keep that in mind. When trying to upload the file earlier there wasn't an option for .bas files, so as you saw, I just renamed it .txt . (And thanks, too, for deleting that annoying post earlier. I'll report any future ones that I see.)
  20. Old Steve

    Switches circuits and rewiring a toy gun - Newbie needs direction

    I contacted Holtek, the manufacturer of many sound effect ICs, asking if they had one that only made a single gunshot sound. (I've used a fair few of their ICs, HK527s, for door chimes. They work well.) They just replied, and appeared to misunderstand my question. Not unusual, considering the...
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