# LTST-C190TBKT (Component) ## Description Ultra-Compact Magnet-Activated 40Hz LED Flasher with LR44 Battery ## Component Details - **Owner:** adrian95 - **Created:** 11/15/2022 - **Last Updated:** 3/7/2025 - **Visibility:** Public - **Mounting:** No specific mounting holes or mechanical features defined; LR44 holder and reed switch positioned at board edge for optimal access - **License:** https://creativecommons.org/licenses/by/4.0/ - **Board Size:** 25.4mm x 25.4mm (1 inch square) - **System Architecture:** graph LR LR44[LR44 Battery] --> Boost[Boost Converter (Nano-power)] Reed[Reed Switch] -->|EN| Boost Boost --> Rail[3.3V Rail] Rail --> Osc[Schmitt Trigger Oscillator\n40Hz, ≈15% duty] Osc --> Res[Current-Limiting Resistor] Res --> LED[Blue LED] - **Stackup:** Standard 2 Layer - **Part Type:** LED - **Datasheet URL:** https://optoelectronics.liteon.com/upload/download/DS-22-99-0224/LTST-C190TBKT.PDF - **Manufacturer Part Number:** LTST-C190TBKT - **Manufacturer Name:** Lite-On Inc. - **Used in:** 292 projects - **Stars:** 1 ## Distributor Pricing (qty 1) *Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.* | Distributor | Unit Price (qty 1) | Stock | |------------|--------------------|-------| | [Arrow](https://www.arrow.com/en/products/ltst-c190tbkt/lite-on-technology.html?utm_currency=USD&region=nac) | N/A | N/A | | [Digi-Key](https://www.digikey.com/en/products/detail/liteon/LTST-C190TBKT/388529) | $0.35 | 79K | | [LCSC](https://www.lcsc.com/product-detail/C125096.html) | N/A | N/A | | [Mouser](https://www.mouser.com/ProductDetail/LITEON/LTST-C190TBKT?qs=RX3h6vwoF9jNAGfkgrwfMA%3D%3D) | $0.27 | 89K | | [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=LTST-C190TBKT) | N/A | N/A | | [Verical](https://www.verical.com/pd/lite-on-electronics-low-power-led--below-100ma--LTSTC190TBKT-630448) | N/A | N/A | - **Part Type:** Optoelectronic Devices - **Manufacturer:** Lite-On - **MPN:** LTST-C190TBKT - **Pin Count:** 2 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | K | | | 2 | A | | --- *Generated from [https://www.flux.ai/adrian95/ltst-c190tbkt](https://www.flux.ai/adrian95/ltst-c190tbkt)*