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  1. colum

    12v power for dashboard camera

    OK
  2. colum

    12v power for dashboard camera

    I see your point about getting too complicated and I agree about the small camera in the rear licence plate but that would require remote control and another card and power supply The multi camera on the front dash would be too obvious and would need a connection to the fuse block and and...
  3. colum

    12v power for dashboard camera

    Good points Mostly bumping to hijack so probably 4 car lengths and then licence plate reading at some point. (a guess) Bug splat ? 12v rechargable whatever type is applicable (with advisement) This assembly would be removed when car parked so I know it would be obvious It would only be used on...
  4. colum

    12v power for dashboard camera

    This will have no connection to the car it will just be a 12v battery and a camera and an on off switch and what ever electric component t power the cameras v. My current front dashcam has the adaptor plug into the cigarette lighter Thanks, colum
  5. colum

    12v power for dashboard camera

    I need to get a camera to record in the rear window of my car that is turned on and only when I'm driving Will this 12v battery need a v regulator Any advice on type of camera or general advice would be appreciated This setup is for security reasons and all manually operated Thanks, colum
  6. colum

    AC generation

    I'm fairly new at posting so I'm going to try I hope you can read this attempt I built both of these circuits and they don't work The wiring on the 4027 has #14 and #15 going going to additional IC and then Transistors The second circuit has the 4027 #15 going to additional IC and # 14 going...
  7. colum

    Maximum circuit size posting

    I want to send circuit images what is the best size ? Thanks, Jeff
  8. colum

    AC generation

    The circuit schematic I lost was the same one that you gave me using a 4017 (thanks) I used 2 of the 4 outputs and upped the power with another 4000 to transistors at this time I only want to test lovolt Vib meters and it seems to have worked fine I now wonder if the sequence of the output of...
  9. colum

    AC generation

    Thanks Delta Prime If I were to use only 2 of these outputs to drive a synchronous motor would it make any difference which 2. To boost the output power to transistors what ser 4000 would be best Many thanks for your advice. Jeff
  10. colum

    AC generation

    I want to drive an old collection of vibration frequency meters , some are lo voltage and some are 120 v. I already built a stepper motor drive and one line was attached to a Vib meter so using 4000 ICs does work and the meter is not picky except it takes a while to settle down after changing...
  11. colum

    AC generation

    I want to use 555 as pulser to a 4000 series IC that will split into 2 alternating pulses I want to use 4000 ser IC but I lost my diagram and I believe it was a 4011 or 4017. and then another 4000 ser to boost the output to Transistors Thanks, Jeff
  12. colum

    Antique meter

    I just Googled it and it was called a Mirror Galvonmeter with alot of history and is still used today in Laser work and it was used originally in underwater long distance communication tests I still have to figure out the required Parrarell low res ct and what voltage is best but that is just...
  13. colum

    Antique meter

    If I had files I would not be asking these questions or need to. I was hoping someone would know how this meter is hooked up
  14. colum

    Antique meter

    Thank you Delta Prime for that research. This type of instrument tested the transmission lines between Canada and Ireland which is the closest point in North America because it was the most sensitive test before electronics were invented. I had one that was used as a lie detector and was the...
  15. colum

    Antique meter

    Sorry I cannot supply photos at this time I have an old Meter from the beginning of transatlantic phone service. It consisted of a bulb as a light source and a tiny mirror suspended on a very thin wire and that wire was connected to the magnets center and rotated in a magnetic field so at rest...
  16. colum

    DC ground

    One is a 9v plug in transformer to a 5v dc rectifier for a pulse generator. The other 12 to 24 v dc plug in transformer powers a backwards transformer this generates an AC current and works great with a 9v dc power on BOTH circuits But can I use a common ground for a higher AC output and still...
  17. colum

    DC ground

    I have 1 DC circuit at 9v and another at `12 to 24v DC that are powering different sections Question Can I use a common ground for these circuits or do I need to isolate each Many thanks...Jeff
  18. colum

    PWM drive

    Some Asian brand driver and yes I want to split and have 2 phase similar to a 4 phase stepper control except that that now I'm starting from full powered 12v and not from ICs and a transistor and I would like to use it as 2 phase to drive another circuit or convert to ACv perhaps. Life is an...
  19. colum

    PWM drive

    I have a PWM drive powerful enough to drive 12v DC motors. I want to split this pulse into 2 pulses I know it can be done with ICs but then I would have to increase the power all over again Perhaps Transistors ?? Thanks colum
  20. colum

    Variable DC

    Thanks Minder for your circuit I built a PWM circuit with 2 555s and a transistor and the results looked great on my meter that went down to 6v but when I hooked it up it the speed did not seem to vary I'm sure it was my error. so I will try for a regular voltage reducer with a 3055 etc Jeff
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