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  1. S

    Looking for circuit Diagram for project

    Are you just looking for a generic project, or are you trying to make a circuit to DO something in particular?
  2. S

    Choosing the Correct AWG

    I'm with *steve*, I'd concentrate on a multi-strand wire, just because you're fishing it through a grommet, and you don't want to break a single strand here or there. Have you checked the commercially available types, to see what they're using? Current-wise, you should be able to use smaller...
  3. S

    speaker distance to PCB

    I know of none. Use good assembly practice in the speaker magnet placement, so that it doesn't interfere with any of your components.
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    Transistors

    Nuts, Resqueline and *steve* are probably skilled engineers. I'm a lowly tech. In school, engineers are taught 'hole' flow for the direction of current flow. Techs are taught to think in terms of 'electron flow', as current flow. Using my water-pipe analogy: Think of a water pipe full of...
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    looking for a 12volt DC push/pull solenoid

    I second that. All Electronics Corp. Van Nuys, CA. They buy end-of-production materials, and sell them at very reasonable prices. Have them put you on their mailing list, if they don't have what you want this month, it might show-up there next month.
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    Colvern potentiometer

    Did you check on-line to see if Colvern (who I never heard of), is still in business? They could tell you what their marking mean. This is my GUESS: Colvern must be the manufacturer 1106/M50 is probably the model number 10KK is where I'm...
  7. S

    cant identify component in battery charger

    A picture would probably help. This SOUNDS like your voltage regulator burned-up. The TO-220 style package for voltage regulators looks like a lot of the packaging for some TRIAC's, so that's probably what you're thinking of. Problem is 70t03gp is either a proprietary number owned by the...
  8. S

    Transistors

    Some tech perfectionist will correct my post, but I figured I better get on, before you zap your transistor. The voltage/current is from the base thru the collector. The emitter supplies the controlling voltage/current for the base/collector flow. Think of it like a water faucet. The base is...
  9. S

    bridge rectifier question

    Resistance value is too small to be a bleeder resistor for the caps. Hewlett Packard used a lot of 'Zero Ohm Resistors' in their old gear, basically as fuses to protect circuits between boards in their test and measurement gear. I may be wrong (I'm sure somebody will tell us that when they...
  10. S

    Matsui TV switching itself off

    There are just too many possibilities for your problem. It's probably going to take a TV service shop to track it down, and find the right component that's causing your set to shut-down. I know that's not what you want to hear, but it'll take a technician to find it, especially since you...
  11. S

    home stereo hum on FM only

    Resqueline and daveen have you on the right track. One other thing to look for, is something physically across your FM antenna input terminals. The hum you're hearing definately sounds like the AC hum from the input power. But I had a guy once, that somehow ran his power cord over the wires...
  12. S

    rgb amp help!

    Probably can't help, but some possibilities to consider. 1) Any stop-gap boards, between the conversion of analog to digital in TV's lately. 2) Any problem with systems (or games) marketed to a particular region, not compatible with what you're using. 3) Really, your problem looks to me like...
  13. S

    RCA TV turning off automatically

    You probably have a cirucit problem. But one experience I had, was the on-off push/button on the TV itself, sticking 'IN'. The plastic push-button itself had become wobbly on the switch shaft, and the plastic housing of the TV chassis, was sometimes keeping the push-button from completely...
  14. S

    bulb

    I'm curious, where did the reference to a 'zero watt' bulb come from? I was wondering if maybe they meant a neon bulb. Not exactly zero watts, but was wondering in what capacity, the original reference was made?
  15. S

    PCB Connector problem

    If you look under Molex mfgr, they'll have insertion directions for their pins. Typically, with Molex, you install the wire in the pin, and then insert the pin (from the back) of the connector, and the pin has 'fins' that snap it in place. Just out of curiosity, you might check that connector...
  16. S

    HP 8903A Audio Analyzer schematic

    Hadn't checked there, but I just did. Their manual is for the first model. I have that manual. I contacted an engineer who used to be HP. He gave me the third manual (S/N prefix 1942A thru 2514A). Unfortuantely, I need the first revision manual. The original model had problems, they did a...
  17. S

    Help With LT1339CNPBF Test Circuit

    I'm lazy when I can be. Consider contacting Linear Technology, and ask them for a recommended equivalent to your obsolete semiconductor. (Or their latest test circuit, for the LT1339CNPBF)
  18. S

    Help with SCR latching

    Stick an incandescent bulb in there, and see if maybe the LED (which IS a diode), is hanging-up your SCR.
  19. S

    design a linear thermistor

    Alright, you've got a thermistor, you want to design a circuit for reading your thermistor. (Not design the thermistor itself). Check www.omega.com It's Omega Engineering, and they have good selection/application notes. I think that'll give you a better idea which direction to take in this...
  20. S

    design a linear thermistor

    I'm not trying to be a putz about this: '20 to 70' , WHAT? The temperature matters I'm also a little confused about whether you already HAVE a thermistor selected, or if you're trying to design your circuit, and then select the thermistor you want. We know YOU know what you're trying to...
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