Directional bridge

143

02:29:38

The switch is for reverse, and when the switch is "on", it's forward. 
RED LED----FORWARD DC(+) 
BLUE LED--REVERSE DC(-) 

published 12 years ago

hurz

12 years ago

But what is the right half part of this circuit for?

ETJAKEOC

12 years ago

The right half seems to be using opposing transistor polarities to provide the proper inversion for the H-Bridge

Voltransistor

12 years ago

ETJAKEOC is right! Lol. It is the opposing portion for ground, so when it's forward, the ground is reversed.

Sine_eyed

12 years ago

Good one Voltran..

Voltransistor

12 years ago

Thankyou! Lol.

hurz

12 years ago

But its just a half bridge, the right part is just wasting current

MickeyD

12 years ago

Cant this be done with less components?

Sine_eyed

12 years ago

@MickeyD- I would guess there are a number of ways to accomplish something similar, and yeah maybe with fewer components- but with just one SPST switch? As it happens once in a while, I could be wrong about this but I think it's what @Voltransistor intended: a reversing circuit by means of single SPST switch..

rbrtkurtz

12 years ago

Indeed, it could be done with less components, but what if you didn't have some of the components you needed to do it with less?

ETJAKEOC

12 years ago

I got that right? Where's my cookie?? :p

Voltransistor

12 years ago

ETJAKEOC-I just got you cookie, it's a cookie with positive symbol on the top and negative symbol on the bottom, with a number in the middle, it's called a "voltage source cookie". Lol. Rbrtkurtz-I depends on if you using a SPST switch takes more and SPDT takes less parts.

hurz

12 years ago

My first comment was bullshit, i didn't saw that ground handling, sorry, nice job, even if emitter follower waste 1.4V ;-)

rbrtkurtz

12 years ago

Exactly my point. Sure, you could achieve the same result as this with less parts using a SPDT, but maybe you don't have one on hand, but still want to build the circuit. It's good to be able to adapt.

Voltransistor

12 years ago

Your right

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