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UK 70TPS12 Thyristor - Help!
It is now working! STOP arguing please! THREAD CLOSED- mangoelectrics
- Post #36
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
THREAD CLOSED This issue has now been resolved. Here is the final working schematic:- mangoelectrics
- Post #32
- Forum: UK Electrical Forum
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Screenshot 2025-03-25 at 20.15.19.png
- mangoelectrics
- Media item
- Comments: 0
- Category: Electrical Videos
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UK 70TPS12 Thyristor - Help!
Thanks, let me explain a bit further. According to the video, mine are no good. They have measurements of between G and K: 138 Ω K and A: 63M Ω and always rising A and G: 76M Ω and always rising I am building a coil accelerator and so am needing to use the thyristor to switch on the coil when...- mangoelectrics
- Post #29
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
@Moley Do you have any suggestions? Thanks!- mangoelectrics
- Post #27
- Forum: UK Electrical Forum
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12VDC to 3.3VDC Stepdown DIY
As @Moley said I would just get one of these: Aliexpress.com Ive purchased numerous of them before. Can't get anything better for the price and SO easy to set up. You will only need a multimeter. Hope this helps!- mangoelectrics
- Post #9
- Forum: USA Electrical Forum
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UK 70TPS12 Thyristor - Help!
Also, when I remove the 1k resistor from - to gate then power the gate with + 5v the motor immediately runs, but does not continue to run after I remove the power to the gate, it should continue to run as I have permanent power to the K and A of the thyristor. Im beginning to think my...- mangoelectrics
- Post #26
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Just tried that now. It does work as you say it should although it takes the positive power in through the gate pin and does not seem to activate the thyristor. Do you know why this might be? Thanks again!- mangoelectrics
- Post #25
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Will try this in the morning, thanks for your help!- mangoelectrics
- Post #24
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Thanks both of you. That’s very helpful to know for sure which is which. If I put - to the gate then the led or motor immediately is powered continuously even without the negative lead going into pin 2. Hope this helps.- mangoelectrics
- Post #22
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Can you tell me which pin you think is the gate? 1, 2, or 3? From the photo I think it’s pin 3, but thought I would get a second opinion. Thanks!- mangoelectrics
- Post #19
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Just connected up a dc motor and have the same results as with the LED.- mangoelectrics
- Post #15
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Will try something and get back to you on Monday. But thanks very much for your help so far!- mangoelectrics
- Post #14
- Forum: UK Electrical Forum
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UK 70TPS12 Thyristor - Help!
Yes, here is another photo. It lights up VERY dim. Obviously the only negative input is from the resistor coming through the gate pin. Sorry, very poor image!- mangoelectrics
- Post #12
- Forum: UK Electrical Forum
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IMG_0709.jpeg
- mangoelectrics
- Media item
- Comments: 0
- Category: Electrical Videos
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UK 70TPS12 Thyristor - Help!
Still nothing. Tried reversing the LED and still no light. When I try this schematic below, it immediately lights up when plugged in, then when I press S1 the light goes out and immediately comes back on when S1 is released. Obviously the power to the LED (LOAD) is coming through the 1k ohm...- mangoelectrics
- Post #10
- Forum: UK Electrical Forum
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Screenshot 2025-03-22 at 17.31.30.png
- mangoelectrics
- Media item
- Comments: 0
- Category: Electrical Videos
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UK 70TPS12 Thyristor - Help!
@mainline This is what it looks like. I am using an Arduino to power it with 5V just for testing purposes. Thanks!- mangoelectrics
- Post #8
- Forum: UK Electrical Forum
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