Recent content by arkypita

PS. my issue with 3.3v board ic logic voltage, is with Ortur. They use STM32 micro that is a 3.3v IC.

Hi 94Z28 Thanks for the level shifter hint. I have solved with increasing the current setpoint of my BlackBuck 8M to give 5A when driven with 3.3V PWM signal (as suggested by Shmackitup) and this is enough for me. I just have to be careful not to connect it to a 5V PWM or else I burn the diode...

The second schema cannot work.

A circuit that I design to level convert 0-3.3v to 0-5.5v is this one. Works quite well and can be plugged directly "on the wire". On breadboard it works, I have to try it live. Unfortunately there is a small issue because the zero volts are not really zero (but near 60mV) because of Vce. I...

Yeah, sometimes the most trivial solution is also the most correct one. If there is no contraindication to set the driver at 6A and use it at 4A (that is the current I need) I really think that will be the solution that I will adopt.

in other words how to drive blackbuck in pwm with a 3.3v signal?

Yes i know how pwm modulation works. Unfortunately the blackbuck does not have a TTL logic PWM input, but has only an analog input. This means that the output current is directly proportional to the input voltage on the modulation pin, of which 5V is a limit, but if you control with 2.5V you...

This is my first post, so I introduce myself. I am arkypita, developer of LaserGRBL.

Hi all I have a blackbuck 8M used in a laser engraver. My engraver use 3.3v as board ic logic voltage, so the PWM signal that goes to the laser driver is 0-3.3v and is not able to push blackbuck to the max power (mod-in is analog 0-5v). Any Idea of how to control the driver with 3.3v? I don't...