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Little green lamp (4805916) |
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by akos boda (akosboda) |
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Web page |
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Nice looking little 1W LED lamp, about half creditcard |
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size. |
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Parts : Phone battery 34x54x6mm max. size, power LED 1W |
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white, coolplate, reflector 22mm, USB connector, |
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resistors,TP4055, enamel wire 0.2mm, thin string. |
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Parts source : Aliexpress |
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The charge circuit is the TP4055 SMD chip. The charge |
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current is adjusted to 100mA. |
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There is very little room for parts, please follow these |
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instructions. Cut a perfboard with 3x2 pads. Bend up pin2 |
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of the chip, solder pins 3-4-5 on the board (pin 1 is |
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NC). Solder a short wire to pin3, feed it through the PCB |
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to the other side, solder 1uF on the other side to pin 3. |
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Same time, solder this wire to the flashlight switch's |
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side tab. Solder 1uF 0805 to pin 4 and 10kohm 0603 to pin |
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5. Solder a thin wire to pin2 and pull it to the other |
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side of the PCB connecting the 1uF there and coming back |
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to the 10kohm GND point. This way the whole assembly is |
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not thicker than 3 mm. Follow the schematics for the rest. |
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Charger circuit too complicated ? see the simple version |
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with diode + resistor. Slow, and the charger voltage must |
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be exact 5.0V. Charger current drops to 5mA at the end. |
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All parts must lay flat, or the battery won't fit. Check |
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the charge current. Pull the carry string in and tie a |
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knot. |
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The LED current is 200-300mA, giving 2-3 hours continous |
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bright light with a full charge. |
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The back cover has wedge sides, take care when sliding it |
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in. Notch is USB side. |
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GreenLampV3.stl is a version for slightly wider (36mm) |
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batteries. |
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Date Published: 2021-05-01 05:45:33 |
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Identifier: thingiverse-4805916 |
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Item Size: 1571714 |
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Media Type: data |
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# Topics |
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stl |
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DIY |
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LED_light |
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3D_printing |
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torch |
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thingiverse |
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Rechargeable |
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# Collections |
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thingiverse |
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# Uploaded by |
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@xtream1101 |
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