i was planning to do this circuit as an h-bridge with a l293
http://www.toddholoubek.com/classes/pcomp/hbridge/Hbridgel293.html
... but something went horrible but surprisingly wrong!!!
i set up the circuit as shown and instead of the arudino i decided to use a low frequency schmitt trigger
as soon as i set up the circuit for the l293 i had to ground one of the wires ( shown yellow in the tutorial) and so i used a coil of wire i had next to me and anchored it to the desk ( i dont know id thats even called grounding lol)...... while i was looking for a dual 556 timer i started whistling ( i like to do that haha) but the unexpected happened!!
i heard buzzing coming from the gearbox so i investigated for shortages... after some messing around i noticed that if i whistle,speak in high pitched voice,touch or blow into the coil the motor goes round at full speed...
wt did i do wrong??
i had not connected any of the 2 other colured wires that are connected to the arudino, no other passive components , just the l293, bridge wires, 5v supply , motor and coil
http://www.toddholoubek.com/classes/pcomp/hbridge/Hbridgel293.html
... but something went horrible but surprisingly wrong!!!
i set up the circuit as shown and instead of the arudino i decided to use a low frequency schmitt trigger
as soon as i set up the circuit for the l293 i had to ground one of the wires ( shown yellow in the tutorial) and so i used a coil of wire i had next to me and anchored it to the desk ( i dont know id thats even called grounding lol)...... while i was looking for a dual 556 timer i started whistling ( i like to do that haha) but the unexpected happened!!
i heard buzzing coming from the gearbox so i investigated for shortages... after some messing around i noticed that if i whistle,speak in high pitched voice,touch or blow into the coil the motor goes round at full speed...
wt did i do wrong??
i had not connected any of the 2 other colured wires that are connected to the arudino, no other passive components , just the l293, bridge wires, 5v supply , motor and coil