Pandora Timer Project

Pandora Timer

Wow! Cool! The guys (thank you Andy Schuler and Randy West) offered to help me with a timer! The internals sourced by Andy, the case kit 3D printed by Rndy.

Assembly is straightforward, start with the reset hole guide and drill.

CA glue pin inside button, let dry.

Solder red wire on positive, black on negative.

I wrapped the battery once around with thin foam tape. Orient battery in the case at the bottom to clear the reset hole. 

Place a short length of straw as a guide for the antenna, route antenna inside.

Place stop/start button in case.

Place board carefully. 4 ea screws hold the board down.

Peel film off back of clear display panel and set in case on top of board.

Peel protective film and screw down display panel.

Charge with USB-C, it will auto shut off when charging is complete.

Long press stop start button to turn on. 

Rocker button to “MENU” to access function options and POWER OFF.

You are done, Pandora timer is ready for usage.

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Turnigy 2000mAh 1S 1C Lipo w/ 2 Pin JST-PH Connector (out of stock)

Spec.
Capacity: 2000mAh
Configuration: 1S / 3.7v / 1Cell
Constant Discharge: 1C
Cell Weight: 33g
Dimensions: 49 x 34 x 10mm
Charge/Discharge Connector: 2 pin JST-PH

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EHAO 123048 3.7V 1800mAh Lithium Polymer LiPo Rechargeable Battery 

Dimensions: 10*34*50mm

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I ordered the four pack from Amazon. Batteries R Us had some that would work but capacity was lower and they were super expensive.

MakerFocus 4pcs 3.7V 2000mAh Lithium Rechargeable Battery 1S 3C LiPo Battery with Protection Board Insulated Rubber Tape and Micro JST 1.25 Plug

Note: 
1. The maximum operating current of this battery is only about 1.5A, can not be used for unmanned aerial vehicles, model aircraft or power tools and other products that require high current
2. Connector is Micro JST 1.25 plug, it can be used for ESP32 ar duino development board whose plug is 1.25mm

Specification:
Standard Voltage: 3.7V
Capacity: 2000mAh
Approx Weight : 35g
Dimensions(±2mm): 50 * 34 * 10 mm /1.96 * 1.33 * 0.39inch(L*W*H)
Discharge Rate: 1C
Working Current: 1.5A
The maximum discharging current: 3C
Overcurrent Protection: 1.8-2.1A
Type of Connector: Micro JST 1.25

Standard Charging Method:
Charging this battery to 4.25V at 0.2C constant current, then charge the battery at a constant voltage of 4.2V till it's charging current ≦ 0.05C

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Documentation 

RC Groups Info: Pandora

Drill the reset hole with the guide

Coffee stir straw to route antenna

Quick charge from my Goal Zero battery bank