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  1. (*steve*)

    Capacitor Protection Boards- How do they work?

    Doubtful, it has 3 connections. No, a "tranny" is a transistor. A "diody" is a diode. Yep, that means it's a transistor Q1 and Q2 are transistors, U1 is something more complex, I'd bet it's a TL431 or similar. That's my guess. Resistors R4, R5, and R6 are probably there to dissipate...
  2. (*steve*)

    Copper Clad Aluminum vs Oxygen Free Copper use, trade off, voltage drop in DC circuits.

    That calculation didn't take into account losses in connectors. If measuring, you should take your readings from the battery posts as one end and the posts or whatever is on the inverter at the other. Also, if you're measuring, you need to measure both conductors as you can't be sure that...
  3. (*steve*)

    Recent posts

    I see them on my mobile (well, new posts link anyway)
  4. (*steve*)

    Copper Clad Aluminum vs Oxygen Free Copper use, trade off, voltage drop in DC circuits.

    That would be best.
  5. (*steve*)

    Copper Clad Aluminum vs Oxygen Free Copper use, trade off, voltage drop in DC circuits.

    Imagine you have one red wire and one black wire running from the battery to the inverter. What you want to do is measure the voltage across the red wire. So one probe on one end of the wire (at the battery) and the other probe on the other end of the red wire (at the inverter). You can start...
  6. (*steve*)

    Copper Clad Aluminum vs Oxygen Free Copper use, trade off, voltage drop in DC circuits.

    You use your multimeter to measure the voltage across one of the pieces of wire leading from the batteries to the inverter. The piece of wire you need is to extend one of the meter leads so it reaches the 25 feet to the other end of the current carrying cable. Ensure your meter is in a voltage...
  7. (*steve*)

    CT Transformer Question

    My guess is that white to white will be double the resistance of either black to white.
  8. (*steve*)

    CT Transformer Question

    There are three leads on the input side because you need to select the correct wires for 115V vs 230V. It's somewhat surprising there's not 4 leads. As to which leads to use, read the documentation or contact the supplier as your first options. Otherwise reading the resistance between pairs...
  9. (*steve*)

    Capacitor Protection Boards- How do they work?

    It's probably shunting excess charge through that large transistor. My guess is that the circuit acts like a glorified zener diode. The are circuits which use inductors to pump excess charge to an adjacent capacitor, but these are somewhat more complex and I see no inductor.
  10. (*steve*)

    General question about EEPROM Programmer

    You could ask. Alternatively, if you know other chips that share the same properties as the one you have (programming interface, success, voltage, etc.) then you have a good chance.
  11. (*steve*)

    Radio and boosting signal

    The amplifier you looked to send to be for a receiver. If you transmit it will likely go up in a puff of smoke. If you are using a repeater network, the best answer might be a directional antenna pointed at the repeater. There are others here who may be able to give a better answer based on...
  12. (*steve*)

    Radio and boosting signal

    So what's the problem, you can't hear them, of they can't hear you (or both)? Are you connecting directly to other handheld units, or is there a repeater?
  13. (*steve*)

    Soldering iron trouble.

    If you have wire mismatched to the connector, incorrect crimper, or incorrect usage of the crimper, then this can happen. Correctly done, crimped connections are very secure. If you're connecting wires to something that can get hot enough to melt solder, soldering is not a great choice (I say...
  14. (*steve*)

    peak detector design

    Google for a peak and hold circuit if you want something that will hold the peak value better. Then reset the hold very briefly after the pulse has been sent. Another option is to hold it in reset while the signal is sent, lifting the reset after a small delay. In general, a MOSFET or a bjt...
  15. (*steve*)

    why is this comparator triggering on falling edge?

    Additionally, the TI datasheet gives very clear information on the input voltage range in the absolute maximum Anna electrical characteristics sections. Not all datasheets are created equal. Notwithstanding the comment I made previously about sight differences between the implementation...
  16. (*steve*)

    Anyone ever build a DC to AC inverter ? Needs to run on 32v DC

    Yes that's true. My suggestion that the transformer would be the first thing was based on the view that with this circuit it would be a complete no-go without it. If you can find a transformer then you will need to do more work to make the test of the circuit work at the higher voltage.
  17. (*steve*)

    List of materials and tools for creating a BIOS chip reader / board with USB and DVI outputs?

    An EPROM programmer?
  18. (*steve*)

    Copper Clad Aluminum vs Oxygen Free Copper use, trade off, voltage drop in DC circuits.

    True, and he speaks of a 50ft round trip, so 25 ft of cable should be sufficient. I had in my head that the distance was 50 metres.
  19. (*steve*)

    why is this comparator triggering on falling edge?

    See note 5 on the book of page 3. See note 1 on page 3. In this case the device allows the inputs to go pretty much from rail to rail, either separately or in combination. There are some devices in which the differential voltage should not exceed a far smaller figure. Likewise the are some...
  20. (*steve*)

    why is this comparator triggering on falling edge?

    No worries. Learning what everything on a datasheet means is not something that happens overnight. One of the important things you've learned from this is that when you go outside the specified limits, weird stuff can happen. This is one of those really interesting ones where they weird stuff...
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