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  1. Alec_t

    Heat gun motor pcb ?

    Top left of the pic there's a xN4007 diode.
  2. Alec_t

    LM394 National Semiconductor 'supermatch' NPN pair

    In your simulation why are you supplying the transistor collectors from a 47k/8.2k voltage divider rather than from the 50V rail? The base-collector junctions are forward-biased.
  3. Alec_t

    DC Motor Control Using IR2104 Driver

    Did you have your measuring device ('scope?) AC-coupled or DC-coupled to the circuit?
  4. Alec_t

    Stuck! I changed the belt on the dymo disc painter and put it back together, it turns on but won’t move

    Hard to tell from the pic, but is this a split in the black plastic part, perhaps from over-tightening the screw? If the plastic has splayed out or the screw is too tight it could stop the sliding action.
  5. Alec_t

    LED Update from thread posted in 2007

    Welcome to maker.pro! Responding to long-dead threads (necro-posting) is generally frowned on. The original participants to the thread may have lost interest, may no longer visit the site, or may even be pushing up the daisies! Providing a link to the old thread, as you have done, is the right...
  6. Alec_t

    reliable motorcycle rectifier circuit

    I don't see how the single-transistor regulator shown in post #8 could be used here. All windings in the magneto have one end grounded, which prevents full-wave rectification with a bridge rectifier.
  7. Alec_t

    reliable motorcycle rectifier circuit

    I'm surprised the bike's lights haven't failed. Is the regulator repairable? Or can you buy another regulator, possibly a used one?
  8. Alec_t

    reliable motorcycle rectifier circuit

    Can you post a schematic for the bike's electrical ystem?
  9. Alec_t

    i am Dean Smuth

    Q: If you have a solution to any question (see post #1), why are you asking about mobility scooters in your other thread?
  10. Alec_t

    i am Dean Smuth

    Q: Is your username an alias for chatGPT?
  11. Alec_t

    NASA MARINE ST50 TRIDATA

    Does the sender/sensor work ok with 'the other pcb' (pcb 1) without any error code showing? If so, and the error code using 'your' pcb (pcb 2) is telling you that the signal is lost, then the fault must lie in (a) the connection of the sender/sensor to pcb 2 or (b) pcb 2 itself, most likely in...
  12. Alec_t

    i am Dean Smuth

    Welcome to maker.pro. First question: Is your user name ....SMATH or ......SMUTH?
  13. Alec_t

    NASA MARINE ST50 TRIDATA

    If the signal is lost, how do you know the other PCB is working?
  14. Alec_t

    NASA MARINE ST50 TRIDATA

    Is the blink rate a fault code? Do you have a User Manual for fault identification?
  15. Alec_t

    Any one thinking to buy a Mobility Scooter

    Please define 'best'. Cheapest, most reliable, foldable for transport, luggage carrying capacity, speedier, greatest range on a charge, availability, comfort, adjustability, repairability, ......?
  16. Alec_t

    NASA MARINE ST50 TRIDATA

    Can you post a schematic of the device?
  17. Alec_t

    Charge a 7.4 Li-ion battery through micro USB port

    That part related specifically to the TP4056 Micro USB 5V 1A 18650 Lithium 3.7 V Li-Ion Battery Charging Board, not to USB powered chargers in general. As this thread is over a year old I expect the TS's battery is fully charged by now :) . Welcome to maker.pro ! Please check thread dates before...
  18. Alec_t

    Little solar powered battery and led.

    It's more fun than the fire or explosion which could result from messing about with a home-brew design if not built properly. Lithium batteries are dangerous if not charged and discharged correctly.
  19. Alec_t

    Little solar powered battery and led.

    Buy a proper balanced charger. The BMS provides over-charging and over-discharging protection.
  20. Alec_t

    Little solar powered battery and led.

    Welcome to maker.pro! A 10W solar panel is never going to power a 15W LED strip, nor even a 10W one on a cloudy day. You need a dedicated charger module to suit the cell chemistry and the number of cells making up a battery. Is this a school/college assignment?
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