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Machine de soudage par points de carte de circuit imprimé de stockage de batterie portable DIY Équipement de soudage à points pour 18650 26650 12V 38% OFF Machine de soudage par points de carte de circuit imprimé de stockage de batterie portable DIY Équipement de soudage à points pour 18650 26650 12V 20,48€ 32,82€ View It
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Top Avis positif pour %s sur Banggood, Achetez le meilleur %s avec le prix le plus bas sur Banggood. Parcourez l'avis positif le plus utile pour %s avant d'acheter., jouets rc, sports amusants, mode, électronique populaire
klemic 04/07/2020
After I assembled the board with beeper, capacitor and the cables it was not working. There was no power at the welding tips. When checking the boards circuit I found this: MCU output -> drives a PNP transistor -> drives the gates of the N-ch FETs. I post a photo of the schematic: It cannot work. The diode is assembled in wrong direction (the PNP transistor will never switch on) and even if it is reversed it cannot work. The PNP transisitor is always on then because the voltage after the diode can never be higher than MCU power supply (5V) plus diode forward voltage. I removed the diode, PNP transistor and the rest and replaced it by a PC817 optocoupler, after that the spot welder works as intended. (The original circuit may work for battery voltages up to maybe 7-8V but not higher). Did the manufactiurer made this change recently? Other users will experience the same issue like me...
105
Commentaires (13)
Soumettre

  • si618 My experience was the opposite, whilst LED flashes and speaker beeps appeared to work, it would continuously dump full current as soon as electrodes touched. It was very exciting :D but you definitely want to test first without being near a battery, and wear safety glasses!

    Had much better luck with the newer spot welder now available, which is currently same price and has red cover, much larger cap and a screen to control power output level at a finer level. That is working well for me.

    Répondre 20/08/2020

  • FLCC77 same issue. always on and not pulsing

    Répondre 05/09/2020

  • Ron I have same issue. LED flashes, buzzer beeps, but no power at welding tips. Unlike you, I'm not willing to rework it to get it to work. I expected to be purchasing a working unit - not something I have to hack around with.

    Répondre 24/09/2020

  • musmiris @Ron It look like this device work only with exact power supply voltage. This diode most likely is zener and with proper supply schematic can work. Of cource this is stupid

    Répondre 17/10/2020

  • BG441117551 I have a replacement one and both the same light on NO pulsing

    Répondre 06/11/2020

  • Supr3mo @si618 Minetoo is dumping the current continuosly, I guess it's a common defect

    Répondre 01/01/2021

  • Peter to banggood does it work or not

    Répondre 16/01/2021

  • Peter does it work or not

    Répondre 16/01/2021

  • Ticu89 O scema a montajului se poate posta intrucit am cumparat recent un astfel de aparat si nu are tendiune la iesire cu toate ca

    Répondre 05/02/2021

  • Ticu89 Al meu nu functioneaza nu are tensiunevla esire cu toate ca ledul pulseaza

    Répondre 05/02/2021

  • Kläuser @BG441117551 Iface the same issue. The green light is steady on. If I press the button for more than 3s, the led flashes and I hear beeps but there is no pulsing. Instead, the led goes back into steady light. If I try to weld, the LED flashes and the beeps are there but it does not work. Afterwards the led light is always on again.

    Répondre 05/02/2021

  • cooky meinesist komplett tot

    Répondre 04/05/2021

  • debuti awesome, that fixed it. the problem now is that the welder doesnt have much power.. and im using a 3s lipo 2.2Ah 50c

    Répondre 05/05/2021
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