https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/Congratulations! See how our winners use flyback transformers through simple-to-complex, hands-on experiments, tests, or designs.en-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219936Fri, 01 Mar 2024 14:45:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:af8db210-24df-44d3-a78d-c7630ba43885javagozaMaybe you can experiment with Blocking oscillators . Source: wikipedia Joule thief - Wikipediahttps://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219849Tue, 27 Feb 2024 12:42:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:cb734917-351e-4277-9b7b-8b2f78051421AnthocyaninaThanks! I looked into this when i saw your response, it seems most controllers won't start with low vin, so now i'm looking into either designing a controller myself, or adding in a charge pump boost converter that kickstarts the whole thinghttps://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219825Mon, 26 Feb 2024 17:24:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:00c391e1-0f36-459f-8876-7b4615dc50d0javagozaIf you are doing the winding yourself, you can still add an auxiliary winding to have a higher voltage, enough to power a common pwm regulator you can even use that auxiliary winding for regulator feedback and not have to complicate measuring in the secondary.https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219752Fri, 23 Feb 2024 23:12:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:26361b07-9d25-4ab1-85cf-78b5ce99e347Anthocyaninai want this toy to be fully analog. the pwm controller is to drive the flyback converter, this time with feedback from the output to keep the output voltage from drifting as the battery discharges. Thank you!https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219751Fri, 23 Feb 2024 22:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:50dabac3-70d8-405a-bced-2d1aa1c62b9adougwThe MCU can do PWM. What functionality do you need with the PWM? - What controls it?https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219747Fri, 23 Feb 2024 19:44:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:8087df9a-a1f9-45e7-8e62-bb6d9b1cdf80AnthocyaninaNo, that's an H bridge, not a pwm controller, but thank you!https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219746Fri, 23 Feb 2024 19:44:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:d636926f-f0cd-4fa6-b8b2-1671c58b2334AnthocyaninaThank you!https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219670Thu, 22 Feb 2024 15:23:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e4029773-c326-48a2-8c26-2579ef676ccfdougwDRV8837CDSGR Is this what you are looking for? It can output any voltage although you would need to boost the input logic to 1.8V. There are small MCUs that will run down to 0.7V by using an internal voltage booster. Such as ATtiny43U, which could drive the H-bridge above with PWM.https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219668Thu, 22 Feb 2024 14:28:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:40bb0f91-49ae-4ca9-a7e5-f5f06a0bac27Jan Cumps[quote userid="438987" url="~/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion"]And well, my second question is if this section remains active in the community, or if this should be used only for the challenge and I should take my questions elsewhere? [/quote] Suggestion for flyback and other PSU discussions, outside the contest area: Bloghttps://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219661Thu, 22 Feb 2024 13:44:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:94b6689f-307e-4848-8a5d-6928cd23b00ejc2048https://www.analog.com/en/products/lt1073.htmlhttps://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219656Thu, 22 Feb 2024 12:43:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:8476019e-fd73-45a7-bdb1-b3c083cf99d7cstanton[quote userid="438987" url="~/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion"]And well, my second question is if this section remains active in the community, or if this should be used only for the challenge and I should take my questions elsewhere? [/quote] We typically don't lock down areas of the Community, but you may find that other groups are better suited for the attention of other members. Such as the Ask an Expert Forumhttps://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219652Thu, 22 Feb 2024 11:46:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c3028ce5-65fc-4f42-9817-341ca2b38128AnthocyaninaThank you, yeah, the wire is fine, but i used new wire anyway I'll wait and see if anyone replies here with any IC recommendations, but will ask there if not. Thanks!https://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussion/219651Thu, 22 Feb 2024 11:41:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7c273962-d294-450d-b162-b6e1ed7da036javagozaI'm glad you keep tinkering and posting about flyback transformers. I hope that the hot air station has not melted or carbonized the enamel on the cable and now you have a short, I would check it first. I don't know what temperature that enamel can withstand. For the second question. This can be a good place to comment on transformer flybacks but I think you still have a larger audience if you post it in the passive components area. (+) Passive Components - element14 Communityhttps://community.element14.com/challenges-projects/design-challenges/experimenting-with-flyback-transformers/f/forum/54385/a-2-parter-does-anyone-know-of-a-pwm-controller-that-can-work-with-1-5v-and-does-this-section-of-the-element14-community-remain-active-for-like-general-flyback-discussionThu, 22 Feb 2024 11:01:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7827e7c9-27fa-4db5-9ca1-d89137e78bc8AnthocyaninaNow that the time constraints have been removed, I want to keep working on my portable chaos toy. I started by taking apart the tiny transformer (the hot air station made this super easy) to rewind it with two symmetrical secondaries. Now my goal is to power the converter with a rechargeable AAA battery, or if getting a low enough voltage pwm controller is not possible, a single 18650. So, does anyone know of a controller that can do that? And well, my second question is if this section remains active in the community, or if this should be used only for the challenge and I should take my questions elsewhere? Thank you!