Shared projects

North_Paw_V2p0-modB-06

2 layer board of 1.66 x 0.94 inches (42.2 x 23.8 mm).
Shared on April 16th, 2018 14:22

SMD version of original


North_Paw_V2p0-modB-06

2 layer board of 1.66 x 0.94 inches (42.2 x 23.8 mm).
Shared on April 16th, 2018 14:22

SMD version of original



breakout MLF20/QFN20

2 layer board of 1.03 x 0.65 inches (26.2 x 16.5 mm).
Shared on April 10th, 2018 22:28


breakout MLF20/QFN20

2 layer board of 1.03 x 0.65 inches (26.2 x 16.5 mm).
Shared on April 10th, 2018 22:28



Northpaw Nano rev G v43

2 layer board of 0.90 x 0.53 inches (22.9 x 13.4 mm).
Shared on March 18th, 2018 00:39

with vcc isolation for: - lsm303 (to allow 5v icsp; if i can’t find a 3v3) -max4822 (to allow being powered by an atmega pin, to reduce sleep power consumption by 100x)


Northpaw Nano rev G v43

2 layer board of 0.90 x 0.53 inches (22.9 x 13.4 mm).
Shared on March 18th, 2018 00:39

with vcc isolation for: - lsm303 (to allow 5v icsp; if i can’t find a 3v3) -max4822 (to allow being powered by an atmega pin, to reduce sleep power consumption by 100x)



nano-G-jig10

2 layer board of 0.57 x 0.85 inches (14.6 x 21.6 mm).
Shared on March 14th, 2018 19:03

50mil castelation ICSP jig for Northpaw Nano rev G


nano-G-jig10

2 layer board of 0.57 x 0.85 inches (14.6 x 21.6 mm).
Shared on March 14th, 2018 19:03

50mil castelation ICSP jig for Northpaw Nano rev G



Northpaw Nano rev G v41

2 layer board of 0.90 x 0.53 inches (22.9 x 13.4 mm).
Shared on March 14th, 2018 19:03

  • ATMEGA328P-MU (or equiv 32-pin ATMEGA 328/168/etc in MLF footprint)
  • MAX4822 (there is no alternative - not even in a different footprint or functionality - this is THE ONLY 3v 8channel PWM/PSAVE with kickback - let me know if you find another (other than MC33996, which is “technically” 5v - see my “Northpaw Mini” versions instead)
  • MCP1700T-3002E/TT (or any pin-compatible 200mA 200mV sot-23 LDO)
  • 0805 MLCC ceramic capacitors - 0.1uF, 0.22uF, 1uF, 10uF (x2)
  • 0805 resistors - 10k ohm (x2) - (for voltage divider. use other values for better voltage granularity)
  • LSM303DLHC (magnetometer/accelerometer - LGA)
  • 8x 100mA motors
  • Ribbon cable
  • JST-PH connection to Li-Po/Li-Ion battery (or other 3.0v-6.0v battery pack)
  • Optional 0805 LED & 0805 resistor for it (choose for however bright you want, e.g. 1k ohm)

All chips rated 2.3v-3.6v (lsm303 can go lower; and the rest are rated up to 5.5v - and all 85 deg C) lsm303: vdd 2.16v-3.6v; max4822: vcc 2.3v-5.5v; 328p: 2.7v-5.5v@8MHz (1.8v@4MHz)

Programming ICSP on custom pinout 50mil pitch castellation.

“Flora-compatible” mounting holes (random holes near edges, probably sewable)

Active power consumption: 100mA-50mA single motor; 6mA atmega; 1.5mA max4822; 150uA lsm303 (that can’t be right); sleep power consumption (after battery level low): 150uA (typ)/300uA(max) into MAX4822; 8uA into motors (leakage); 1uA into atmega (power-down with PRR off, WDT off, & BOD off); 1uA into lsm303 (so they say) so ~0.2mA after flat battery - so don’t leave it plugged in for weeks after shutdown or it will destroy the battery.


Northpaw Nano rev G v41

2 layer board of 0.90 x 0.53 inches (22.9 x 13.4 mm).
Shared on March 14th, 2018 19:03

  • ATMEGA328P-MU (or equiv 32-pin ATMEGA 328/168/etc in MLF footprint)
  • MAX4822 (there is no alternative - not even in a different footprint or functionality - this is THE ONLY 3v 8channel PWM/PSAVE with kickback - let me know if you find another (other than MC33996, which is “technically” 5v - see my “Northpaw Mini” versions instead)
  • MCP1700T-3002E/TT (or any pin-compatible 200mA 200mV sot-23 LDO)
  • 0805 MLCC ceramic capacitors - 0.1uF, 0.22uF, 1uF, 10uF (x2)
  • 0805 resistors - 10k ohm (x2) - (for voltage divider. use other values for better voltage granularity)
  • LSM303DLHC (magnetometer/accelerometer - LGA)
  • 8x 100mA motors
  • Ribbon cable
  • JST-PH connection to Li-Po/Li-Ion battery (or other 3.0v-6.0v battery pack)
  • Optional 0805 LED & 0805 resistor for it (choose for however bright you want, e.g. 1k ohm)

All chips rated 2.3v-3.6v (lsm303 can go lower; and the rest are rated up to 5.5v - and all 85 deg C) lsm303: vdd 2.16v-3.6v; max4822: vcc 2.3v-5.5v; 328p: 2.7v-5.5v@8MHz (1.8v@4MHz)

Programming ICSP on custom pinout 50mil pitch castellation.

“Flora-compatible” mounting holes (random holes near edges, probably sewable)

Active power consumption: 100mA-50mA single motor; 6mA atmega; 1.5mA max4822; 150uA lsm303 (that can’t be right); sleep power consumption (after battery level low): 150uA (typ)/300uA(max) into MAX4822; 8uA into motors (leakage); 1uA into atmega (power-down with PRR off, WDT off, & BOD off); 1uA into lsm303 (so they say) so ~0.2mA after flat battery - so don’t leave it plugged in for weeks after shutdown or it will destroy the battery.