Search results

  1. B

    Trouble Identifing Zenor Diode on automotive ICU board

    If there are any intact, one could test out of circuit with a component tester such as shown below. Less than $30.00 and a good tool to have onhand, not only for diodes.
  2. B

    Machine 5 position selector switch

    You need to isolate the caps from the circuit so lifting at least one leg is a must. Simply snip the cap lead close to the terminal, then resolder when finished. Not a brain operation. It might be possible to test if the cap is switched out of circuit but it would be more complex to determine this.
  3. B

    12v 5a PWM, how to test

    Usual place is on the output of driving transistor or mosfet but on the motor leads should work just as well. I would tend to solder it in place though, whichever .......
  4. B

    Fuse for LED strip controller

    If the single insulated wiring is your output, they're not that "thin" as you describe. They'd probably handle 10-15a without a problem so my guess is the short would have produced a much higher current to melt the insulation. 5A fuse on the output will be fine to cover short circuit situation...
  5. B

    Clarifications on the PWM signal

    PWM is dc, on and off, not sine wave, no ac content no rms values etc. etc. If you apply 50% duty from a 5v source then the average output is 2.5v. The scope will show 5v pulses.
  6. B

    Hello and help!! (need circuit to see if a pump did run)

    Another option.....although only useful while mains power is available.
  7. B

    Machine 5 position selector switch

    Taking it apart will more than likely destroy it and proove nothing. A good clean with contact cleaner while running the switch back and forth might just do the job. As far as the switch operation, cannot see it properly in the photos you provided. Does look like a 2 pole unit though and if one...
  8. B

    Machine 5 position selector switch

    As others have said, check the switch, most likely failure point.
  9. B

    short circuit detector

    Wally..??
  10. B

    Help to identify relay pins

    Well then, show your wiring...... You do realise you will have only 3 mA flowing with a standard LED and the 1k resistor...??
  11. B

    Making the connection

    There is also a range of sizes of these bullet solder type connectors used in r/c gear mostly on motors. https://hobbyking.com/en_us/4mm-gold-connectors-10-pairs-20pc.html?queryID=9ca2413833dd7597da4a8b62684c36ec&objectID=43816&indexName=hbk_live_magento_en_us_products
  12. B

    Transistor AND gate question

    Page 22 in spot the mistakes........ http://www.talkingelectronics.com/projects/SpotMistakes/SpotMistakesP22.html Show what you have done...... Are you using LEDs as output..?? Do you have low's and Hi's connected or just left one input floating...??
  13. B

    Which Equipment for opening&closing coal stove

    One here on Ebay AUD$17.00 ( approx US$12.00) https://www.ebay.com.au/itm/1X-220V-Actuator-For-Air-Damper-Valve-Electric-Air-Duct-Motorized-Damper-WiY6M7/203096730658?hash=item2f49822c22:g:rrMAAOSwphhfUMcI
  14. B

    salt swimming pool chlorinator

    Usually they operate with more than 5v. Most I've ever had anything to do with were up around the 24v mark.
  15. B

    Which Equipment for opening&closing coal stove

    You could build your own using a low voltage series motor with a shaft encoder for position and a screw thread for the operator. Monitor position via the Arduino and adjust as necessary. Motor size would depend on mechanical size of this stove air inlet door. Don't know about LM332 for...
  16. B

    BATTERY RECHARGING DETAILS NEEDED

    https://www.electronicspoint.com/forums/attachments/reverse-current-flow-1-1-jpg.49593/ This electron flow versus conventional is simply confusing to most and should be avoided. Normal terminology when referring to battery supplies is charge or discharge current and in the conventional style.
  17. B

    9V DC Motor Stutter

    Show a drawing of exactly how this is mounted. Motors such as you describe usually run at speed and bogging down will cause excessive current draw and can cook the motor windings. Also what is the 9v battery comprised of. 9v 1A plug pack not suitable either for most applications.
  18. B

    BATTERY RECHARGING DETAILS NEEDED

    No idea what you mean by reverse current. Normal charge rate is 10 % of capacity. Plenty of charge circuits out tbere for nimh and possibly even some dedicated modules. Certainly are dedicated chargers one could use such as is used by r/c people. Batteryuniversity is a terrific site for any info...
  19. B

    5V USB UPS Switch

    Draw a sketch of your intended complete circuit.
  20. B

    Power Electronics for Beginners

    I'd be inclined to think the power section would be a small part of any overall electric vehicle design. More likely the sensors, microcontrollers and programming would take up the vast area of knowledge requirement. Aside from that, most vehicle warranty requirements which can go for many...
Top