A12 – Wearable LED Gadget with Full-Color LEDs
New addition to my wearable LED accessories is A12. A12 is the same size as R48, uses the same microcontroller and battery, but with 12 full-color LEDs. A12 produces patterns similar to Aurora mini 18, but lighter and has a built-in battery holder in the back.
A12 comes with a non-rechargeable battery (CR2450) and a black cord (lanyard) to hang around the neck. The battery lasts for about 5 hours or more in continuous run.
There are also rechargeable battery (LIR2450) and the charger available. With those, you won’t need to keep buying batteries.
The charger is very compact and plugs right into an USB port.
Features/Notes:
- 12 full-color LEDs produce beautiful colors.
- A12 is available fully assembled or soldering kit.
- Comes with a non-rechargeable battery (CR2450, easily replaceable).
- Battery will typically last about 5 hours continuously.
- Also comes with black cord (lanyard) to hang around your neck.
- 10 beautiful animation patterns preprogrammed.
- “Demo” mode automatically runs though all animation patterns – changes every minute. (Activated by holding the button at the startup.)
- Rechargeable battery (LIR2450) is also available as an option. This recommended option lights the LEDs brighter, as it has higher voltage.
- The charger for the above is also available.
- Dimension: 1.9 inch diameter, 0.4 inch thick (including the battery)
Technical Details:
- 12 common-anode RGB LEDs.
- PIC24F08KL301 16 bit microcontroller @ 32 MHz.
- Each LED is PWM controlled in 128 gamma-corrected levels.
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R48 and Li-Ion Charger
R48 comes with a non-rechargeable battery (CR2450) and a black cord (lanyard) to hang around the neck. The battery lasts for about 7-8 hours in continuous run.
There are also rechargeable battery (LIR2450) and the charger available. With those, you won’t need to keep buying batteries.
The charger is very compact and plugs right into an USB port.
White LEDs look yellow when they are not lit. Other colors (red, green, and blue) look like the photo above.
Features/Notes:
- Available with 4 different color LEDs: Red, Green, Blue, and White.
- Each R48 is fully assembled, and comes with a non-rechargeable battery (CR2450, easily replaceable).
- Battery will typically last about 7-8 hours continuously.
- Also comes with black cord (lanyard) to hang R48 around your neck.
- 25 beautiful animation patterns preprogrammed.
- “Demo” mode automatically runs though all animation patterns – changes every minute. (Activated by holding the button at the startup.)
- Rechargeable battery (LIR2450) is also available as an option. This recommended option lights the LEDs brighter, as it has higher voltage.
- The charger for the above is also available.
- Dimension: 1.9 inch diameter, 0.4 inch thick (including the battery)
LIR2450 Li-Ion Battery and Charger
LIR2450 is a coin cell, Lithium-Ion rechargeable battery. Physically the same size as CR2450, LIR2450 can be used as a rechargeable replacement to CR2450 in most cases.
This little battery has little over 100 mA/Hour capacity, with nominal 3.6 V output. This battery is perfect for powering a small project.
The problem (for me) was that there were only poor quality chargers available for this very useful battery. Since I could not find a good charger for it, I made one.
This charger is based on the popular MCP73831 by Microchip to charge Lithium-Ion battery safely.
The charger is very compact and plugs right into an USB port.
Features/Notes:
- Compact design plugs into an USB port
- Charge/Done LEDs indicate the charge status
- Charge current: 45 mA typical
- Charge time: about 3 hours
- Dimension: 1.15 x 1.45 x 0.38 inches
