Senior Member
Joined: 13/08/2024
Location: NetherlandsPosts: 104
| Posted: 09:17am 14 Oct 2024 |
I made a mistake in my above story. It has already been demonstrated that the Pico can pick up a signal with the infrared sensor. Now I can start to figure out how the Pico can be integrated into the amplifier. Investigating if the Pico works as a transmitter is not necessary for this purpose.
The next thing that needs to be done is to look at the operation of the TC4028 and the LB1641. The first is a BCD to decimal decoder and the second is a bi-directional motor control.
The motor control has its input on pins 5 (IN1) and 6 (IN2) and has a switching point of 1.5V. Everything above 2 V is High. Both pins H or L is the brake. In fact, they can be controlled directly bythe Pico if the BCD-dec decoder is bypassed in the new circuit. However the situation around the TC4028 must first be investigated. There are still a few loose transistors included in the circuit.
IMOH, it's all designed in a very cumbersome way, I think the BCD-dec decoder could have been omitted and the motor control could have been controlled directly from the processor. They're going to make things difficult by toggling between (ABCD inputs) -> (Dec output) HHHL and LLLH to make Q7 or Q8 high. They could have used just 2 pins on the processor voor Q7, Q8 (up/down). Of course it's also possible that I'm missing something, that happens more often. This is my quick conclusion.
Edited 2024-10-14 19:18 by Marcel27