Native Shield

The native shield is stacked on an arduino mega. Next to the mandatory functionalities related to the 0816 feeder, the board has some useful capabilities commonly used in the context of pick and place machines. So there are optionally two vacuum sensors, analog inputs breaked out and 4 power output switched by mosfets. You might want to consider using the cheap and widely available sensor shield mega. There is a comparison table at the controller-page to help you to make the right decision.

Order pcb directly from

  • or load the source files (see below) to order pcb from somewhere else cheaper

To fully assemble the controller-pcb you need following parts. The BOM is grouped by functionalities independed of each other. So if only feeder functionality is desired, leave out everything from the other groups. You could even leave out the SMD parts in the feeder functionality group and solder a jumper wire to connect the feeder GND line to the PWR_FEEDER GND line which would have been done by mosfet Q5 normally. The pcb is then just a translation of the arduino mega pinout to the 4 pin feeder connectors.

placement of parts
solder bridge if Q5 is omited → no automatic switch of feeders' power supply then.
Part Value Device Package Description
Parts for Functionality: Feeder
Arduino Mega
N0…23 PINHD-1×4 1×04 connect a feeder, one per Nxx connector
PWR_FEEDER PINHD-1×2 1×02 external power supply connector
INT_PWR PINHD-1×2 1×02 set jumper to power feeder from arduino mega (don't wire external power then!)
ADC_AUX PINHD-1×6 1×06 PIN HEADER
Q5 AO3400A AO3400A SOT23 N-CHANNEL MOS FET
R9 470 R-EU_R0805 R0805 RESISTOR, European symbol
R10 10k R-EU_R0805 R0805 RESISTOR, European symbol
C3 100n C-EUC0603K C0603K CAPACITOR, European symbol
C4 CPOL-EUE2.5-5 E2,5-5 POLARIZED CAPACITOR, European symbol
+ many pinheads for connection to arduino mega
Parts for Functionality: Vacuum Sensing
C1 100n C-EUC0603K C0603K CAPACITOR, European symbol
C2 100n C-EUC0603K C0603K CAPACITOR, European symbol
VAC1 MPXV6115VC6U MPXV6115VC6U MPXV6115VC6U
VAC2 MPXV6115VC6U MPXV6115VC6U MPXV6115VC6U
Parts for Functionality: Four Power Output
C5 CPOL-EUE2.5-5 E2,5-5 POLARIZED CAPACITOR, European symbol
OUT1 AK500/2 AK500/2 CONNECTOR
OUT2 AK500/2 AK500/2 CONNECTOR
OUT3 AK500/2 AK500/2 CONNECTOR
OUT4 AK500/2 AK500/2 CONNECTOR
PWR_IN AK500/2 AK500/2 CONNECTOR
Q1 AO3400A AO3400A SOT23 N-CHANNEL MOS FET
Q2 AO3400A AO3400A SOT23 N-CHANNEL MOS FET
Q3 AO3400A AO3400A SOT23 N-CHANNEL MOS FET
Q4 AO3400A AO3400A SOT23 N-CHANNEL MOS FET
R1 470 R-EU_R0805 R0805 RESISTOR, European symbol
R2 10k R-EU_R0805 R0805 RESISTOR, European symbol
R3 470 R-EU_R0805 R0805 RESISTOR, European symbol
R4 10k R-EU_R0805 R0805 RESISTOR, European symbol
R5 470 R-EU_R0805 R0805 RESISTOR, European symbol
R6 10k R-EU_R0805 R0805 RESISTOR, European symbol
R7 470 R-EU_R0805 R0805 RESISTOR, European symbol
R8 10k R-EU_R0805 R0805 RESISTOR, European symbol

Pinout: Feeder Connectors to Arduino Mega Pins

The pinout is to be found in boards.h in the firmware. Here is the table:

feeder number (index) servo-pin feedback-pin
N0 13 12
N1 11 10
N2 9 8
N3 7 6
N4 5 4
N5 3 2
N6 14 15
N7 16 17
N8 18 19
N9 22 23
N10 24 25
N11 26 27
N12 30 31
N13 32 33
N14 34 35
N15 36 37
N16 38 39
N17 40 41
N18 42 43
N19 44 45
N20 46 47
N21 48 49
N22 50 51
N23 52 53

PCB revisions

version manufacturer price changelog notes to improve next rev.
v1 elecrow 5pcb for 10$ -
v2 pcbways 10pcb for 5$ first public release
v2.1 - - renamed feeder connectors same way as in firmware
added missing pin for AUX_IN
v2.2 - - *GND width for pwr out cont. 1,27mm
*soldermask keepout around fiducials
*spi socket for ethernet module
*break out sda and scl for i2c comm to other pwm modules

I realized Method A for me, tested Method D and used Method B for prototyping. The other types to control the feeders are just ideas and need more effort to setup.

Setup Description
A Arduino Shield for 24 feeder native shield
B Temporary wiring on prototyping board Just use some temporary or permanent breadboard-pcb with pinheads and connect to an arduino mega. For first test this would be the cheapest solution. Wire as shown in fritzing and upload the firmware for the 0816 controller without any modification on the mega. The suggested wiring map to feeder with the index N0.
C Dedicated Servo Driver use PCA9685 16 Kanal 12 Bit PWM Servo Motor Treiber with feeder pcb. untested, but should work. would need you to adapt the firmware. Pins for the feedbackline (if desired to use) are still needed.
D Sensor-Shield-Arduino-Atmega Another untested option: Sensor Shield. Pinout of Firmware has to be modified. Feedback-Line doesn't work with this board because the fourth line is missing.
X Own Build Build your own controller. Just need 5V, GND and PWM for controlling the servo-motor. If desired there is a fourth line for rudimentary feedback about the feeders status.
  • maschine/pickandplace/feeder/0816feeder/nativeshield.txt
  • Last modified: 2018/11/30 11:18
  • by michael