2

Author Topic: Infared Emitter/Reciver for a noobie :/  (Read 2083 times)

0 Members and 1 Guest are viewing this topic.

Offline MaltiKTopic starter

  • Robot Overlord
  • ****
  • Posts: 300
  • Helpful? 2
Infared Emitter/Reciver for a noobie :/
« on: November 10, 2008, 07:37:15 AM »
In the infared emiitter/detector circuit, T1 is the for the LED? and L1, for for the reciever?




also the DIP LM358 has 8 pins, which, according to the schematic, do I connect, from where the + is to the VCC (pin 8) and the - to the GND (pin 4), if so then the other 6 pins alone?
Warranty

Offline mbateman

  • Full Member
  • ***
  • Posts: 82
  • Helpful? 0
Re: Infared Emitter/Reciver for a noobie :/
« Reply #1 on: November 10, 2008, 08:40:15 AM »
L1 is the LED. T1 is the reciever transistor.

Here is the pinout for the LM358...  http://www.national.com/images/pf/LM358/00778702.pdf

Pins:
1 Vout
2 -
3 +
4 Gnd
5 not used for this circuit (could be second circuit +)
6 not used for this circuit (could be second circuit -)
7 not used for this circuit (could be second circuit Vout)
8 Vcc


Offline ArcMan

  • Supreme Robot
  • *****
  • Posts: 519
  • Helpful? 4
  • Mmmm... Plasma
Re: Infared Emitter/Reciver for a noobie :/
« Reply #2 on: November 10, 2008, 12:56:45 PM »
BTW, the photo-transistor circuit does not need the op-amp if you are just going to wire it to a uC input.  Just tie the phototransistor emitter to ground and pull the collector up to Vcc with a 4.7K resistor (or there abouts), and then tie the collector to the uC input.  Viola!  Easy, and it works great.

Offline Admin

  • Administrator
  • Supreme Robot
  • *****
  • Posts: 11,659
  • Helpful? 169
    • Society of Robots
Re: Infared Emitter/Reciver for a noobie :/
« Reply #3 on: November 13, 2008, 01:37:31 AM »
The amplifier is only required if you are measuring really small signals. If you get great signals without the amplifier, you don't need to bother with it.

 


Get Your Ad Here

data_list