Hi all.
As I am a programmer I do not understand schematics and fundametals of electrical engeneerings very well and as this is my first design of schematic i'd like to consult it with guru's.
the schematic is at www.mgubani.host.sk/schematic1.jpg
The LTV845's are optocouplers (optoisolator) (https://www.electro-tech-online.com/custompdfs/2005/12/ltv815.pdf). The pins are connected or "multiplexed" like (ltv-845a = pins 1-8, ltv-845b = pins 9-16...from the top side on the left...
1-4-5-8-21-24
2-3-9-12-17-20
6-7-10-11-12-13-16
14-15-18-19-22-23
and the pins from the MCU are connected like:
MCU p.2 -> pin 1
MCU p.3 -> pin 2
MCU p.11 -> pin 6
MCU p.12 -> pin 14
I'm not very sure that i have connected the BC639 transistors to the LTV845 correct but... maybe should work...
The circuit should be used as an interface between PC and 3 stepper motors. I know that i can't do two-coil excitation but it doesn't matter...
Thank you for any comments
Magnum
As I am a programmer I do not understand schematics and fundametals of electrical engeneerings very well and as this is my first design of schematic i'd like to consult it with guru's.
the schematic is at www.mgubani.host.sk/schematic1.jpg
The LTV845's are optocouplers (optoisolator) (https://www.electro-tech-online.com/custompdfs/2005/12/ltv815.pdf). The pins are connected or "multiplexed" like (ltv-845a = pins 1-8, ltv-845b = pins 9-16...from the top side on the left...
1-4-5-8-21-24
2-3-9-12-17-20
6-7-10-11-12-13-16
14-15-18-19-22-23
and the pins from the MCU are connected like:
MCU p.2 -> pin 1
MCU p.3 -> pin 2
MCU p.11 -> pin 6
MCU p.12 -> pin 14
I'm not very sure that i have connected the BC639 transistors to the LTV845 correct but... maybe should work...
The circuit should be used as an interface between PC and 3 stepper motors. I know that i can't do two-coil excitation but it doesn't matter...
Thank you for any comments
Magnum