Using a L9110 H-Bridge module without an Arduino

Discussion in 'The Projects Forum' started by Nocapacity, Nov 6, 2015.

  1. Nocapacity

    Thread Starter New Member

    Sep 3, 2015
    4
    0
    Right, I better come clean, I'm a huge amateur trying to learn on my feet and I seem to be failing at every turn.

    I want to drive a motor forward and backward using one switch. So, I've created this toggle circuit -

    [​IMG]

    Now, I wanted to use this H-Bridge module - http://www.gie.com.my/products.php?action=modules/motor/L9110_motor so when the toggle switch is pressed it switches the direction of the motor (the motor will always be on one way or another). If pin IA1 on the H-bridge module is high (connected to pin 3 of the toggle circuit) and IB1 is low it goes clockwise and vice versa. But I want them both connected up so the switch alternates the direction of the motor. I tried setting up a resistor/diode flip-flop and connecting IA1 and IB1 to either side of them, but this doesn't seem to work. Am I fighting a losing battle or is there a way of getting this module to work with my toggle circuit?

    I've removed the LED and resistor at pin three from the above circuit as this seems to trigger the H-Bridge module.

    Sorry if my description is bad and if I'm getting everything wrong please let me know.
     
  2. Metalfan1185

    Active Member

    Sep 12, 2008
    146
    0
    Idk if its the best solution, but a possible solution would be to use 2 inverter gates from a 7404 IC. Like this:

    12226699_10153793560094887_1473922508_n.jpg

    I forget the pin numbers but they are easy to find. GND the unused gate inputs on the 7404.
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,991
    3,227
    Below is the LTspice simulation of a simple push-button toggle circuit with debounce using a CD4049 hex inverter that gives the A and B signals for your driver circuit.

    PB toggle ckt.PNG
     
  4. Nocapacity

    Thread Starter New Member

    Sep 3, 2015
    4
    0
    Ahh thanks, that makes sense. I really thought there would be a way of doing this without an IC, I tried a diode/resistor gate and a transistor gate, but still couldn't get it to respond. Do you know why this might be the case?
     
  5. crutschow

    Expert

    Mar 14, 2008
    12,991
    3,227
    Not without a schematic of those circuits.
     
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