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  1. (*steve*)

    Hello, Welcome! (Introduce yourself)

    Hi John. Welcome to Electronics Point.
  2. (*steve*)

    I want to made a mini heater for a my 36.8v 8.62A 320w solar panel

    Never used yenka. See if it has a constant current source. Its likely to be in the same place constant voltage sources are.
  3. (*steve*)

    Substitute for MC14049 inverting hex buffer

    Yep, they have the same part number and are probably very similar parts. It's always with checking out the datasheet just in case the one you're substituting doesn't have (say) a higher maximum supply voltage that may be important in the circuit you're making
  4. (*steve*)

    I want to made a mini heater for a my 36.8v 8.62A 320w solar panel

    You need a voltage regulator to give the fan a nice steady 12V. A 7812 is the simplest solution.
  5. (*steve*)

    Time delay for cheap.

    I'd put a 100 ohm resistor in series with your power supply connection to the relay. This will limit the charge current to about 125mA.
  6. (*steve*)

    MOSFET's Gate Driver Circuit

    SOA for bipolar transistors is a slightly different issue as it is limited by secondary breakdown in the high voltage/ high current corner. Mosfets don't have this problem, and after generally limited by thermal conditions in the corresponding region. When switching, the mosfet briefly goes...
  7. (*steve*)

    Time delay for cheap.

    The cap on its own is probably ok because these devices are designed to connect to a voltage source. My concern is the charging of the capacitor. What is the source of the 12V applied to the SSR and can it withstand what is effectively a brief short every time the delay is offered on? You may...
  8. (*steve*)

    simple radio amplification

    I was being serious.
  9. (*steve*)

    Wanted: Industrial Keyboard

    I've never seen one like that. Do you know what interface it's using? What's it for?
  10. (*steve*)

    Time delay for cheap.

    One on the problems with just using a capacitor is that you need to charge it when power is applied and this may require significant current. Is power completely removed? Could you use the 230vac that is switched to power (say) a small USB charger to provide power to hold the SSR on?
  11. (*steve*)

    IR tx & Rx

    Unusual, but there you go.
  12. (*steve*)

    IR tx & Rx

    Did you try asking them which one is the transmitter?
  13. (*steve*)

    simple radio amplification

    Yes Type www.google.com into your browser's address bar and press enter. Then, when the google page appears, type "fm transmitter circuit" and press enter.
  14. (*steve*)

    simple radio amplification

    Really? I'd call bulldust on that. Whatever... Just google for some circuits. However you may better spend your time studying so you can understand some basic theory.
  15. (*steve*)

    simple radio amplification

    Yeah, just build a low power fm transmitter and use a normal fm radio. Not necessarily legal, depending where you are, but simple.
  16. (*steve*)

    IR tx & Rx

    I would expect the clear one is the led and the dark one the photodiode or phototransistor.
  17. (*steve*)

    simple radio amplification

    You go first. Tell me how to amplify 2:30 on the afternoon.
  18. (*steve*)

    Wire wrap circuit

    Write wrap wire is easily obtainable. The tools are available if you know where to look. The sockets after becoming more and more rare. If you've got the stuff, go for it. If you were starting out I'd probably not recommend it.
  19. (*steve*)

    Need help repair Sunshine ATX psu

    The readings you are getting are what I would expect from a working transistor. What other possibilities have you investigated?
  20. (*steve*)

    simple radio amplification

    Frequency can be amplified the same way that 2:30 in the afternoon can be amplified.
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