NanoboyPICO-V3-02-JR, a unique ESP32 development board
     
 		  
  Top side  

Bottom side

  

 

 
 

 

NanoboyPICO-V3-02-JR features:

1. The newest ESP32 PICO chip, PICO-V3-02.

2. 32-bit 240 MHz Dual Core, 8 MB internal flash and 2 MB internal PSRAM.

3. 2.4 GHz Wifi, 802.11b/g/n and Bluetooth BLE 4.2

4. 3.3V, 600mA LDO, 8 uA deep sleep current.

5. The reversing current blocking diode D2 (BAT20J) is rated at 1A with low leakage current.

6. 21 GPIOs.

7. Standard WS2812B RGB. The RGB can be turned off when it's not in use. It will extend battery life.

8. 5V power LED indicator.

9. User LED and user pushbutton switch.

10. U.FL ANT or Whip ANT offers greater receiving sensitivity for Wi-Fi communication.

11. Larger RESET pushbutton, easy to press.

12. On board QWIIC connector with power on/off control for external sensors.

13. Breadboard friendly, the battery connector is placed on the top layer.

14. Includes a set of male and female headers and a 2-pin JST LiPo battery connector.

15. Size: 1.4" X 0.708" or 35.56mm X 17.99mm.

16. Pin spacing: X--0.1", Y--0.6".

 

Highlights: 

Controller ESP32-PICO-V3-02
 Internal PSRAM
Memory size N8R2
GPIO number 21
Reversing current blocking diode D2, BAT-20J, rated at 1A
Usable LDO output current SOT23-5,  600mA
On board user LED Yes, GPIO13
On board user button Yes, GPIO38
QWIIC/STEM interface Yes
Antenna Whip Ant. and u.FL Ant.
Charge status LED No flickering
Battery connector location On the top of PCB
RESET pushbutton Larger, easier to press
Board size 1.4" X 0.7" (21 GPIOs)
Battery level monitoring resistor divider Is switched off in deep sleep mode
Deep sleep current 8 uA
Price includes two 1x14 female headers Yes ( worth $0.50)

 

 

  Parts included in the package:

One NanoboyPICO-V3-02-JR board.
Two of 1x14 male headers and two of 1x14 female headers.
One 2-pin JST connector, 2mm pitch.

 

  

 

Unique features on the NanoboyPICO-V3-02-JR board

1. A digital switch is added to turn off the battery level test circuit after the test is done. It will reduce deep sleep current significantly.

2. With a Low Pass Filter, the battery charge status LED does not flicker when a battery is not connected.

 

     

NanoboyPICO-V3-02-JR-OLED

  

NanoboyPICO-V3-02-JR-TFT

  

8 uA Deep Sleep current

  

Our more expensive DMM has an auto range feature, but unfortunately it could not display lower than 10uA, but this cheap DMM does. It's just amazing, it's even very accurate compared to other more expensive DMMs.

 

In order to achieve lowest deep sleep current possible, you have 3 basic choices:

1. Use a digital switch and a resistor divider with low value. The resistor divider is only turned on for reading voltage level, can be turned off at 99.9% of time.

2. Use a resistor divider with very high value, the battery voltage level reading will be very unstable. Defeat the purpose of reading battery voltage level.

3. Do not have the resistor divider in your circuits at all. Do not monitor the battery voltage level.