Web controlled Surveillance Camera

Step 4 Motor Driver for the Bipolar Step Motor

To control the step motors we have to build a motor driver. There is difference between bipolar and unipolar motor drivers. Bipolar motor driver is little bit harder to do, than unipolar.

Used parts:

- Attiny2313-processor
- 12MHz crystal
- 2x 27 pF capacitors
- L7805CV regulator with 100 nF and 4,7uF/35V capacitors
- L7808CV regulator with 100 nF and 4,7uF/35V capacitors
- 1N5408 diode
- 2x Dual-H-Bridge (model L293B)
- TTL-RS transducer (model ST232ACN) with five 0,1 nF capacitors
- 2,1mm DC connector
- screw terminals

L293B Dual-H-bridge does not contain internal diodes !
Model L293D contains diodes.

Comments

[bengus]

hi..nice work!
where can i find the firmware for this and a better resolution schematic?
tnx

[ewertz]

Since you pointed out the difference between the L293B and L293D, why'd you choose to go with the "B"? Is it a case of "I had a B around (and not a D) and chose to use it" ?

[iideetee]

Yes, "D" ones were out of stock.