https://community.element14.com/products/manufacturers/vishay/ en-USTelligent Community 12https://community.element14.com/products/manufacturers/vishay/b/blog/posts/simulating-a-verilog-pid-controller-with-ntc-thermistors-in-qspiceFri, 19 Jul 2024 10:54:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:db205035-19b6-4d94-aa91-b01063ed6263alain_stasTemperature control circuits, despite the rise of digital technology, continue to rely on analog sensors like NTC thermistors and RTDs, which are prevalent in automotive and industrial applications due to their reliability and cost effectiveness. While digital simulation software such as SYNOPSYS Saber RD and Simulink Simscape is available for those who can afford it, they often lack precise models for passive components like thermistors. SPICE analysis, therefor, remains a mainstay for circuit analysis due to its popularity and accessibility. Recently, however, QSPICE ™ — a free software developed by Mike Engelhardt of LTspice® fame — has emerged. It uniquely supports digital simulations with VERILOG and C++, bridging the gap between traditional SPICE and modern digital circuit descriptions. this blog will present a complete simulation of a PID controller defined in QSPICE ™ coupled to a Vishay NTC thermistor NTCS0603E3103FLT. The PID controller has been separated into its 3 blocks (proportional/ differential/ integrative) and each block has been verilated separately in order to verify their functionality. Optimization of the PID coefficients is easily performed by sweeping the values of Kd, Ki, Kp through realistic ranges and the result of temperature control can be seen hereunder. time (s) The offset between the oven temeprature and the set temperature prfile is now kept to a minimum.pidNTC sensorsveriloghttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199383Tue, 26 Jul 2022 08:41:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:452a36f8-b595-4199-b83f-78146102fe60michaelkellettWithout scope traces of waveforms it is not possible to make any useful comment. MKhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199380Tue, 26 Jul 2022 06:46:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:bad89217-e3e7-428c-a655-77ef3db38e34chintanBut it is flicker while we used LED bulb and it is flickering while brightness has been increased above 70%https://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199359Mon, 25 Jul 2022 11:07:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b72dfc58-6689-4eb8-9d51-a88772a1fd55chintanIt is working fine with Incandescent light bulb without any flcikring. we are dimming the bulb by PWM signal with 50Hz frequency i.e. waveform has T=20ms. And based on that we are changing the duty cycle as per zero-crossing detectionhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199358Mon, 25 Jul 2022 11:04:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:cf6201fa-ac7a-4411-907f-468ae5d0c0cfchintanYes, This is commercial projecthttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199357Mon, 25 Jul 2022 10:37:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c091dc6f-a58a-4351-a4e5-683e2706d047michaelkellettThis isn't quite what I had in mind. Do you have an ocilloscope ? You will need to take precautions re. isolation of mains AC voltages to do any measuring here. If you do not understand why this is necessary or do not know how to safely measure mains powered equipment then you will need to find someone to do the work for you. It will not be possible to debug this design without checking waveforms with a scope. Is this a commercial project (ie are you designing something which you wish to amkes and sell) ? MKhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199356Mon, 25 Jul 2022 10:32:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:3c2e8a37-c722-4b34-b646-548f400db340chintanHere input Supply voltage is 230V AC, 50Hzhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199351Mon, 25 Jul 2022 09:45:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:08770714-ecb5-4dd4-8151-123122853182chintanPFA the testing resultshttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199350Mon, 25 Jul 2022 09:44:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:29c55122-e861-48ef-b847-433aa1af05c5chintanhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199347Mon, 25 Jul 2022 09:04:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:066d2945-323d-42fc-ac27-2149d0511db5michaelkellettOK, so show us pictures and test results - no one can help you without enough information to undertsnad your proble,. MKhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199344Mon, 25 Jul 2022 08:47:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0ed48470-79c9-4c62-bb84-957a032ef6dechintanWe have not done the simulation we have making the our circuit on General Purpose Board (GPB) and done the testing with LED lighthttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199343Mon, 25 Jul 2022 08:13:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:37a1a23e-20ca-4c0c-a034-de1c70ec4436michaelkellettIf you were to show us your simulation data it might be possible to help. What simulation tool did you use ? MKhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199341Mon, 25 Jul 2022 06:11:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:270c204f-d2c1-4fa3-8d1a-1d4d343ff9d1chintanYes i tried, but it is flickering during the dimming LED light while i used LED light. So, please give me the appropriate solution for the same.https://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199291Fri, 22 Jul 2022 08:58:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ae0b932c-b48a-4539-9351-1259484fbf32michaelkellettHave you tried simulating this design ? MKhttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199288Fri, 22 Jul 2022 07:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:9a50aa3b-8eaf-449a-933c-129d930b1019chintanPFA circuit design filehttps://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuitFri, 22 Jul 2022 07:58:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e6cf1551-71f3-4d69-a200-9d0f0453e071chintanI am Chintan Gopani. We have designed the Dimmer circuit using Triac BT136 and MOC3021 and Zero crossing detection circuit and other peripheral devices. Our application is to dim the standard dimmable LED lights fixtures in the USA. Our application is based on the USA market. I attached the design file for the review. I request you that please schedule the call with a technical person for the design improvement.https://community.element14.com/products/manufacturers/vishay/f/forum/51387/verify-the-enclosed-led-dimmer-circuit-using-triac-bt136-and-moc3021-circuit/199287Fri, 22 Jul 2022 07:58:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:bba89cab-653e-4341-ac6b-6ef8cfec4ef9chintancommunity.element14.com/.../MeshTek-1CH-AC-Triac-Dimers_5F00_V1_2D00_0.pdfhttps://community.element14.com/products/manufacturers/vishay/f/forum/51329/vcnl4040-vs-vcnl4020Thu, 14 Jul 2022 10:41:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:2e6357e1-8d04-4085-8062-77c05943d716zafersenHi, I was looking for a whitepaper about a detailed comparison of Vishay's vcnl4040 and vcnl4020 sensors such as a comparison of power consumption for each feature, and key differences between these two sensors. I did it by reading their datasheet myself but you know to confirm I just wanted to see whether there is anything to compare. Vishay's engineer team may have something about this issue. Thank you!VCNL4020VCNL4040comparisionhttps://community.element14.com/products/manufacturers/vishay/m/managed-videosWed, 27 Oct 2021 15:43:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ee2ea4c3-3423-4b25-b5a0-bf7ae85a9e99