Hello, i build a system which suppose to run speed control of electric engine, with loginc of Raspberry Pi.
Control Signal does not go through SSR.
System Connection Logic:
(1) RaspberryPi 3 ->
(2) Bi-Directional Logic Level Converter Hookup Guide ->
https://learn.sparkfun.com/tutorials/bi-directional-logic-level-converter-hookup-guide to change 3V3 logic to 5V logic
(3) SSR-40 DA ->
https://www.amazon.com/SSR-40DA-Solid-Output-24-380V-SSR-40/dp/B07FVHWN82 to change input signals from DC to 230 V with optocoupler, zerophase and triac
(4) PSC Engine, 1phase, 0,35 A, 1,5 mF
Electronic circuit schematics of SSR, https://www.youtube.com/watch?v=WLP_L7Mgz6M - Solid State Relay || DIY or Buy,
Engine speed control is being build. At the beginning i though that SSR itself, will be sufficient solution, to command signal ON/OFF, between computer and motor.
It didn't worked. DC signal from 3V3 GPIO, can not open signal on AC side, and Raspberry do not have 5V control system.
While using SSR: I can run engine, if i connect DC side of SSR to constant 5V pin. (if i connect DC side of SSR to constant 3V3 pin it DOES NOT work).
While using SSR: Yes I can control speed control when using mechanical relay like JQC3F-5VDC-C between Raspberry and SSR, where 3V3 signal opens logic, and 5V is let through to SSR.
(But i do not want to use this solution - mechanical relay wont last long with such a frequent work)
To have other device in the middle, instead of Relay, I bought (2) Bi-Directional Logic to let 5V goes, but it does not move the engine.
I connect (2) Bi-Directional device to control Mechanical relay, (to check if (2) works), it is proven that (2) works
What i need to know:
So far as,
SSR with 3V3 signal directly Raspberry Logic AND
SSR with 5V signal indirectly through (2) Bi-Directional
do not let me the 230 V through,
- 5V Signal indirectly through Relay does let me to control the speed
what i suppose to change in the system to make it work,
Is there any resistor i suppose to put in series somewhere in the system, or what?