Review of schematic

Projects
146

Thanks again Rob,

saw_V12.pdf (120.7 KB)

  1. NEW added LED on remote relay circuit. Figured I could use the same resistor as wired for the FET but added one in parallel.
  2. Changed resistors for LEDs to 4k7 on 24V, and to 1K on 5V circuits
  3. Changed Ref ID on ‘P’ labelled connector
  4. Changed second (Schottky) ref
  5. Changed reference to voltage regulator.
  6. Changed regulator power to 5A. Have not done a power audit but figured it would help. RPi3 likes 2.5A alone and the regulator would be close to 3A.
  7. Changed LED9 orientation and supply to draw from a +5V to ground in the ULN2803
147

I would put LEDs 4 & 5 on the replay side, between the drain and 24V with 4K7 resistors.

D1 is the Schottky, D2 is a zener.

You have two D2 now.

Otherwise looks good if DRC doesn’t complain.

148

Updated with changes.

saw_v13.pdf (113.9 KB)

1293×910 454 KB

A few markers on the DRC, but none that seemed more than a warning.

ERC report (5/30/2017 2:18:09 PM, Encoding UTF8 )

***** Sheet /
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,43.18 mm): Pin 2 (Input) of component STP_DRV_1 is not driven (Net 5).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,40.64 mm): Pin 3 (Input) of component STP_DRV_1 is not driven (Net 6).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,38.10 mm): Pin 4 (Input) of component STP_DRV_1 is not driven (Net 7).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,66.04 mm): Pin 4 (Input) of component STP_DRV_2 is not driven (Net 16).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,68.58 mm): Pin 3 (Input) of component STP_DRV_2 is not driven (Net 17).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,71.12 mm): Pin 2 (Input) of component STP_DRV_2 is not driven (Net 18).
ErrType(4): Conflict problem between pins. Severity: warning
@ (151.13 mm,64.77 mm): Pin 2 (Bidirectional) of component U2 is connected to
@ (113.03 mm,175.26 mm): pin VO (Power output) of component APXW005A0X3-SRZ1 (net 26).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (104.14 mm,93.98 mm): Pin 1 (Input) of component SW1 is not driven (Net 39).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (96.52 mm,96.52 mm): Pin 3 (Input) of component STP_DRV_3 is not driven (Net 44).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (104.14 mm,99.06 mm): Pin 3 (Input) of component SW1 is not driven (Net 45).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (257.81 mm,102.87 mm): Pin 1 (Power input) of component #PWR016 is not driven (Net 59).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (30.48 mm,66.04 mm): Pin 1 (Power input) of component #PWR039 is not driven (Net 60).
ErrType(3): Pin connected to some others pins but no pin to drive it
@ (153.67 mm,44.45 mm): Pin 3 (Power input) of component U1 is not driven (Net 71).

** ERC messages: 13 Errors 0 Warnings 13

149

This may have been what you meant for the LEDs…

150

As I note in this post, it’s OK to continue posting about this here in the projects category, but I did want to invite you to a more general electronics forum, which might be a better fit for future posts:

151

Thanks Chris.

Will do. Does that work for you Rob?

Adam

152

The LED will light up whenever the motor is OFF (if a motor is connected).
Consider putting it in parallel to the motor, like the relay LEDs.

153

Hi Martin,

Here is a revised schematic.

saw_14.pdf (120.5 KB)

Thanks for the feedback,

Adam

154

Hi everyone,

I moved this over to a build log at Contextual Electronics.

Thanks for all the help and advice !!!

Adam