stevenh
Member
Howdy all,
I've been tinkering with Parallel Ports recently. I've managed to control LEDs from My PC, Amiga 1200 and Commodore 64 using the ports available. This was my first step on the project. Second was to control a 74HC595 to multiplex and get more outputs.
Third has been to integrate a 12v throttle. Now, I've previously done Arduinos and have played with L298s to send out voltage, even DCC. This time around I want a throttle with notches, displayed with LEDs. My thoughts initially were to use the 8 outputs of a 595 to control the resistance into a simple 12v throttle.
I've come unstuck with the collector pin and how to use the digital output of the 595 to control the transistor.
The throttle circuit I've tried to integrate with is: http://www.talkingelectronics.com/projects/ThrottleMkI/Throttle.html
My current circuit looks like: http://modelrail.otenko.com/electronics/shift-registers-for-the-parallel-port-interface
I was hoping if someone could help me bridge the gap. On the base of the transmitter I'm trying to replace the potentiometer wih a resister in series from the 595. I assume I'll also need a transistor in there too?
595 digital out pin would go to the base pin of a lesser transistor which would have specific resistor on either side, being one of the steps-of-eight on my throttle? I don't quite know which transistor to choose for this?
Please see my hideous drawing attached.
All help is greatly appreciated.
I've been tinkering with Parallel Ports recently. I've managed to control LEDs from My PC, Amiga 1200 and Commodore 64 using the ports available. This was my first step on the project. Second was to control a 74HC595 to multiplex and get more outputs.
Third has been to integrate a 12v throttle. Now, I've previously done Arduinos and have played with L298s to send out voltage, even DCC. This time around I want a throttle with notches, displayed with LEDs. My thoughts initially were to use the 8 outputs of a 595 to control the resistance into a simple 12v throttle.
I've come unstuck with the collector pin and how to use the digital output of the 595 to control the transistor.
The throttle circuit I've tried to integrate with is: http://www.talkingelectronics.com/projects/ThrottleMkI/Throttle.html
My current circuit looks like: http://modelrail.otenko.com/electronics/shift-registers-for-the-parallel-port-interface
I was hoping if someone could help me bridge the gap. On the base of the transmitter I'm trying to replace the potentiometer wih a resister in series from the 595. I assume I'll also need a transistor in there too?
595 digital out pin would go to the base pin of a lesser transistor which would have specific resistor on either side, being one of the steps-of-eight on my throttle? I don't quite know which transistor to choose for this?
Please see my hideous drawing attached.
All help is greatly appreciated.