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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by Dix

  1. D

    help

    I remember my own study days many years back. In my class the other classmates had help available elsewhere, I guess their fathers were all engineers. They were not very creative but they made it well and most of them got good jobs after. I was one of those few who couldn´t afford to buy my...
  2. D

    help

    Hi What would the complexity be as? What kind of telecom studies are you in? I will get back and think about it. /Dick
  3. D

    Bistable on/off-circuit.

    When thinking of a solution, different types of components have to be considered. Could an optocoupler be used? I think of three types. First the standard one then the ac in type with two leds in opposite direction together and then the schmitt trigger type. Now the transistors in these...
  4. D

    Bistable on/off-circuit.

    Thanks I am more than impressed. Primarily due to the attention my question got. Secondly due to suggestions looking realistic. I did too, earlier think of a design with a reed relay with a delay, but I couldn´t settle my mind up to clear it out. Nor could I with the use of an SCR of...
  5. D

    Bistable on/off-circuit.

    Hi John, It has to be a "make - button". Bad to say maybe I´m not that bright that I sometimes believe so please explain the alternate flip/flop version you mentioned. /Dick
  6. D

    Bistable on/off-circuit.

    Hi John, answers are yes, yes and ... yes again, a car battery. Why we (me and my other "companion") want a pressure switch that is not bistable, is because; the products in which this is about to be in, have other functions too, also set on/off with the same type of switch. Therefore...
  7. D

    Bistable on/off-circuit.

    Why would curiousity arise?! Zener diodes are cheaper. This is to be used in several products and it will probably be changed a little here and there but basically the same. Cost is a factor. Only if I was given free components I would have used other types. The supply voltage to the f/f is...
  8. D

    Bistable on/off-circuit.

    Here you go Ok, now nothing is left to (lack of) fantasy anymore. (Advice; read some good books too, not just Data books ;-) And so to be clearified. I would like to see this, or equivalent, in an existing chip and as said, I would pay for getting that info.
  9. D

    Bistable on/off-circuit.

    Hm And I´m still thinking it´s weird that there is no known ic-circuit in the market that would do the job. All the "modern" (crap) equipment for the last 15 years are mostly switched on by a micro switch. What kind of circuitries are there in all those rice-plastic-products? Only 4 pins...
  10. D

    Bistable on/off-circuit.

    What about this? I might have been overly descriptive above. So sure. There are 4 blocks mentioned above. A resistor-zener diode, a flip/flop-circuit, an npn transistor and a voltage regulator. The flip/flop is powered by the zener. The resistor above the zener is connected to the car...
  11. D

    I need help for searching datasheets ofTIP41A, NPN TIP42A

    Re: I need help for searching datasheets ofTIP41A, NPN TI I went to google to get it in a few seconds. Don´t you use search engines?????????????????????????????????????????????? http://pssaudio.com/Technique/motorola/TIP41x.pdf
  12. D

    Bistable on/off-circuit.

    I thought it would be easy...! I have some electronics (a project) that needs a regulated voltage, from a 3.3 V regulator (KA278R33). Connected to ca 12 V. I also want to switch this electronics on and off with a toggling flip/flop. Therefore, the flip/flop always needs voltage. In order to...
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