Search results

Search Forums New Posts
  1. S

    VCR identification - need help please

    I sympathize, congratulations on keeping your VCR running as long as you have. The way I've seen those universal remote sheets written, they list the manufacturer in the header, and then all the models underneath that manufacturer. You are correct that not all remotes work on all of the same...
  2. S

    VCR identification - need help please

    Nope, Montgomery Ward had their own 'brand' unit; though like you, I don't remember who made it for them. Montgomery Ward had proprietary information associated with the models they had made for them. Somebody here might have a better idea about how to help you. In the meantime, I'd be looking...
  3. S

    Bush Dab radio keep turning itself off

    Sounds reasonable. I wonder however why the power pack won't operate if it's not damaged. Any possibility the plug-in connector jack on the radio is bent/damaged and causing the problem?
  4. S

    Bush Dab radio keep turning itself off

    Really sounds to me like you have a programmed 'off' timer set. Any push-buttons stuck that might be causing this 30 minute 'on' time that then turns the radio off? Is there an on-line manual for it, or do you have the original manual to look-up possibilities?
  5. S

    Need help with LED sign I found on the road

    Any manufacturer identification plate on it, that might tell us who made it and a model number?
  6. S

    Newark / Farnell / Element 14 become my new "supplier of last resort"

    In the US it's Newark. Somehow they fanagled a contract with my employer, offering special deals. My experience is that they RARELY actually have the parts I want in stock, no matter what they tell me. When they get the order, (and GETTING the order is their priority, regardless of their...
  7. S

    Accuracy of digital multi-meters?

    How did you 'match' them to .05%? Did you use your inexpensive multi-meter to do that, or select manufacturer-marked tolerance resistors? Somebody here will probably study your schematic, there's a lot of circuitry involved there, come of which could account for the discrepancy you see.
  8. S

    to make a ultrasound speaker

    Audoguru has a point. If you go with a peizo speaker, a lot of manufacturers don't live-up to the specs they claim. There are some other good ideas in this thread that I haven't heard before. When I selected the peizo speakers I used way back when, I made sure I got ones that were good at...
  9. S

    Diode Symbol

    It's and LED. Considering the fact that this is a communications line, be aware it may be a UV one depending on the application.
  10. S

    to make a ultrasound speaker

    I used to make them when I lived in places where mosquitos lived. There are a lot of simple circuits free on-line. The critical part is a piezo speaker, that's the only way you get to the high frequency needed.
  11. S

    crt tv horizontal display problem

    If the filament at the neck of the picture tube lights-up, the picture tube is on. The yoke is a separate circuit.
  12. S

    The new types of IOT

    Figures. I'm too old to have figured that out. Thanks kellys_eye. My IOT is that George Jetson won't have to go into work to push the button that starts-up his factory each day. He just gets on the internet and does it from home. (How's that for dating myself)
  13. S

    Ground Zero amp help!

    I don't have time right now to look at your schematic (GREAT, that you supplied it). From your description, I'd fix that RCA jack connection problem. Your amp outputs power to the speakers. You didn't say if the broken ground was on an input or an output, but if their was a short circuit from...
  14. S

    The new types of IOT

    My thought, is that I don't know what 'IOT' is.
  15. S

    SCADA

    The generic stuff is generic. The concept of the 4-20ma feedback loop interfaced to the central computer system is industry standard. If you want to know what you're doing with the system you're supposed to work on, you need to know the specific instruments you'll work with. I'm talking about...
  16. S

    Conundrum using resistors? (Raw rookie)

    Kellys_eye is pretty good on his advice. I wouldn't doubt his 100 ohm (and your calculation) for the LEDs. If you can load a picture/schematic of your circuit. Try to describe how you wired it, and exactly where you're taking your voltage readings at.
  17. S

    SCADA

    I worked Supervisory Control & Data Acquisition systems for water treatment for 8 years and the electric utility company for 2 years. As kellys_eye said, most industrial process control instrumentation runs 1-5V/4-20mA. The SCADA system is the central computer system that monitors all those...
  18. S

    Conundrum using resistors? (Raw rookie)

    Yes, we don't know your circuit or where you're reading your 5v from. The total will be 5v across your circuit. If you're just reading across your resistor with no LED's in the circuit, you'll just read the 5v. If your LED's are in the circuit backwards you'll read the 5v. Most simple LED...
  19. S

    Anyone know this manufacturer?

    Your picture shows "R. C. L." on the part in question (dyslectic?) What makes sense to me is that RCL MADE the part under contract to GE, hence the GE part number.
  20. S

    Anyone know this manufacturer?

    I don't know for sure, but there was an RCL Electronics that specialized in resistors. It was sued by Dale Electronics for patent infringement in the early 1970's. May have gone out of business for that back then. They did a lot of specialized molding and composite work for specific applications.
Top