H bridge with ULN2003
Posted by Ib / Vce(sat) on May 7, 2006
Brand new circuit that you will fin nowhere on the internet.. he he cos i found this out. Well runnig DC motors for a robot you can very happily use this low cost circuit that using a L293D for Rs175!! in this circuit i have put a H-Bridge circuit with u ULN 2003 Ic that costs just 12 bucks.
okie now i assume the circuit is very easy to understand.. A" and B" are the two control signals.. givin a high to any one of them wil make the motor move in one direction while a signal to the other will mover it in opposite direction.The main asvantage of this circuit being that you can adjust the voltage applied to the motor by cahgig the sypply at collector of the BC107.(sorry people for not puttin " >" at the emitter. assume it to be down!!) i almost got my recor torn by my techer for not putyting the arrow at the emitter in my secon semester of college!!!<>
Its all about !!!
Al said
Hello,
I’m trying to implement this circuit to drive a floppe drive stepper motor (4-wires, bipolar). I’m confused on how to connect the wires to the outputs. What are the blue and red lines (wires) for?
Thank you
Jibu said
hi u r circuit is interesting and simple but even 175 is too costly for me newbie is it ok if i use nots and diodes instead of the chip ULN2003
madan said
@Jibu: ULN2003 Costs 12 not 175
g.prasanna said
this circuit works but it doesn’t seem to be sensible to have two bare transistors allowing a high current through them.
g.prasanna said
i suggest another 2 darlingtons in place of single transistors.
madan said
well i don think you are grounding any high current through them. but then this is just representation . ppl are supposed to add proper resistances at the base. But this doesn drain any high current. It is the ULN2003 that drains some 500mA
Any suggestions prasanna?
Bhaskar said
But where is the circuit for H bridge implementation with ULN2003? It is not showing the image of circuit
urmila said
hi
i want to used uln2003 as driver ic to control the stepper motor for FPGA…………….
will you help me
microcontroller said
I have searched about the word “stepper motor” and you blog appeared to me.
where can I read about stepper motor in details in your blog?!
omkar said
what is the circuit for foreward and reverse direction movement of the stepper motor,using ic uln 2003 and how it will implement can u please suggest me?