Timeline for BTA12 triac driver circuit
Current License: CC BY-SA 4.0
27 events
| when toggle format | what | by | license | comment | |
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| Oct 15, 2022 at 17:20 | answer | added | khalil seidali | timeline score: -2 | |
| Sep 21, 2022 at 5:00 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| May 12, 2022 at 3:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jan 8, 2022 at 12:04 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Dec 1, 2021 at 10:18 | history | edited | ocrdu | CC BY-SA 4.0 |
added 10 characters in body; edited title
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| Dec 1, 2021 at 10:01 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
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| Jul 31, 2020 at 12:46 | comment | added | winny | Sounds normal. Test with an incandecent bulb as load in parallel to your multimeter. | |
| Jul 31, 2020 at 12:04 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 14, 2020 at 13:58 | answer | added | Selns | timeline score: -1 | |
| Jan 8, 2020 at 21:22 | comment | added | A.M.S | Update: the problem seems to be the snubber circuit, without it every thing is working correctly. the only question is : when triac is off is it normal to measure around 17 volt ac at its output terminal with and without load connected ? and will absence of snubber circuit cause problem ? | |
| Jan 8, 2020 at 20:24 | comment | added | A.M.S | @Andyaka and yes with other circuit without snubber it didn't blink. | |
| Jan 8, 2020 at 20:23 | comment | added | A.M.S | @Andyaka Yes it was an led lamp | |
| Jan 8, 2020 at 20:22 | history | edited | SamGibson♦ | CC BY-SA 4.0 |
Split text (mostly where intended by OP, but where only 1 x Enter had been used) to prevent "wall of text". Some grammar changes to improve readability.
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| Jan 8, 2020 at 20:22 | comment | added | A.M.S | Update : there is another bta12 driver circuit in board exactly like this one but without snubber circuit (it is for heater). this one seems to work correctly with lamp and pump but only problem is when turn it off, a very small spark with a very small sound happen between triac (bta12) pin number 1 and 2, and also i think very few times when turn lamp off after a very short time (miliseconds) lamp does a blink. and also it works with pump but what is that spark for ? and can snubber circuit in the other circuit be the cause of problem ? | |
| Jan 8, 2020 at 20:21 | comment | added | Andy aka | Was it an LED lamp? If so, that sounds normal because the snubber lets thru enough current. | |
| Jan 8, 2020 at 19:51 | comment | added | A.M.S | @Andyaka When logic pin is low with lamp and multimeter connected in parallel to J4 terminal it cause the lamp to blink as fast as it is visible to human eye, like turn it on and of with a mechanical switch and multimeter read around 37 vac. When logic pin becume high the lamp turn on constantly (i think the blink of it may not be visible to human eye ) and multimeter read around 220 vac and a gane at low logic level the lamp blink. | |
| Jan 8, 2020 at 19:43 | comment | added | Spehro 'speff' Pefhany | Try shorting 4 to 6 on U5 and see if the triac turns on. If there's something wrong R9 might burn up so be careful of that, and potential shock. If it does, then your wiring may be wrong or U5 may be bad. | |
| Jan 8, 2020 at 19:41 | comment | added | A.M.S | @SpehroPefhany Yes it is 1.235 vdc. | |
| Jan 8, 2020 at 19:38 | comment | added | A.M.S | @VillageTech i tried both and read around 220v, no difference. | |
| Jan 8, 2020 at 16:27 | comment | added | Spehro 'speff' Pefhany | The circuit appears correct. The 220VAC multimeter measurement when 'off' is expected with the pump not connected because of the snubber network R3/C7. Carefully measure the voltage from pin 1 to 2 of U5 with the logic input high. It should be approximately 1.2VDC. You don't need VAC for the measurement. | |
| Jan 8, 2020 at 16:14 | comment | added | Andy aka | Have you tried using a lamp as the load? | |
| Jan 8, 2020 at 16:13 | comment | added | VillageTech | Are you measuring the voltage with pump and multimeter connected to J4 in parallel, or only multimeter? BTW: D5 is not needed here. | |
| Jan 8, 2020 at 16:05 | review | First posts | |||
| Jan 8, 2020 at 18:43 | |||||
| Jan 8, 2020 at 16:01 | history | asked | A.M.S | CC BY-SA 4.0 |