$3 18650 Rechargable Flashlight
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Bill of Materials
- AMC7135 x 1: https://www.amazon.com/TQDLYKHS-L7135-Constant-Current-AMC7135/dp/B0DRYCTM6L?pd_rd_w=zkRTv&content-id=amzn1.sym.52548f63-aa6f-47d3-941a-d69d44966d80&pf_rd_p=52548f63-aa6f-47d3-941a-d69d44966d80&pf_rd_r=HSYFPRE93A5V7XKXBRS3&pd_rd_wg=lB628&pd_rd_r=9f9be330-a38c-4680-9e05-2fc6c2039e0e&pd_rd_i=B0DRYCTM6L&psc=1&ref_=pd_bap_d_grid_rp_hxwhrp_sspa_dk_bia_0_12_t
- Self-Lock Micro Push Button Switch x 1: https://www.amazon.com/dp/B086L3J1Z6?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1
- High Power Led Chip 3W x 1: https://www.amazon.com/dp/B01DBZICDC?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1
- PCB (Attached in .zip file) x 1:
- Wire 22ga solid core x 1: https://www.amazon.com/dp/B07TX6BX47?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1
- Hot glue x 1:
Description
THIS FLASHLIGHT IS GONNA COST YOU MORE MONEY AND TIME THAN JUST BUYING ONE ON AMAZON!
However, this flashlight can be fully built by you and that's worth more to me.
Buy a $5 flashlight off amazon that will only last a year or spend $40 getting parts to make enough flashlights to last the rest of your life - the choice is yours.
This flashlight is a solid small flashlight that is brighter than your phone flashlight.
This is a flashlight I built and designed with a custom PCB. I will attach the gerber files so the PCB can be ordered at your discretion.
This is my first time designing a PCB.
Please note that you need a diode running on the bottom switch pin to ensure current flows correctly through the circuit. (This is a design flaw on my end that maybe ill redo one day)
This flashlight costs roughly $2-3 dollars if you are like me and have 18650s laying around and decide to buy enough parts to make about 10 of them.
This is not meant for everybody to use but rather just a simple hobby project I made to test my CAD and PCB designing so I don't have well documented guides on assembly.
I just assembled the PCB with the 3w LED, AMC7135 driver and a Self-Lock Micro Push Button Switch then added an XT30 in parallel to the battery connections to allow for charging from an external charging circuit that is also linked as a project on my profile. Once it was all soldered and in place I “potted” it with hot glue. It's held up well for me so far.
Attached are the gerber files to order custom PCBs from jlcpcb.com or any other PCB supplier.
This was my first order so 20 of them only cost me $4 (shipping included in that).
I'm more than happy to help anybody that wants to actually wants to assemble this, however just please note that this is a hobby project not meant as a community project with easy assembly.
If there is any interest I can possible build some more and make an assembly document. Until then it is what it is and please reach out if you have any questions
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