go_away

Author Topic: Power Regulator $50 Bot ans Centering Servos  (Read 1510 times)

0 Members and 1 Guest are viewing this topic.

Offline NubyTopic starter

  • Jr. Member
  • **
  • Posts: 28
  • Helpful? 0
Power Regulator $50 Bot ans Centering Servos
« on: July 19, 2009, 08:38:18 PM »
I did not totally understand the power regulator instructions so I thought if would try and build one on it's own board that would help me learn and I might be use it on my second project.
Had a fuse which not right but know to correct that and the LED lite up.
The first regulator is an ML7805A using a 10uF 100V capacitor.
the second is a NTE2364 using a 0.1uF 100V capacitor plugged into the first capacitor's output. I will be using a 1400mAh 6V battery pack Ni-MH.
At 7.5V input from my power supply the ML7805A put out 6.64V and the NTE2364 put out 6.15V.
At 6V input the ML out put 5.17 and the NTE out put 4.69V.
 Two questions related one question off subject;
1) What might be my problem with getting from 6V to 5V with my set up?
2) Is there a product i can get to get me past this from now?
3) The reason I am this far along with my electronics section without prepare the servos is I need help on getting them to true center before I take them apart. Already messed up one servo from another project cause i do not think I centered it correctly.

Thank you for your time I will move on to progarming for now. Can not wait until I have a better understanding of this basic stuff so I can just buy me a Axon for my ERP.

Best Regards
Nuby
 

Offline SmAsH

  • Supreme Robot
  • *****
  • Posts: 3,959
  • Helpful? 75
  • SoR's Locale Electronics Nut.
Re: Power Regulator $50 Bot ans Centering Servos
« Reply #1 on: July 19, 2009, 08:59:49 PM »
do you have a schematic for what you have right now?
1. do you need all the regulators? are you just regulating from 6v-5v?

2. no idea :-\

3. did you use the center servo code when you messed it up?
Howdy

Offline NubyTopic starter

  • Jr. Member
  • **
  • Posts: 28
  • Helpful? 0
Re: Power Regulator $50 Bot ans Centering Servos
« Reply #2 on: July 19, 2009, 09:38:41 PM »
1) Think it is the one in the $50 robot instruction.
2) Darn
3) No I think that is why it is screwed up. Do not really know how to get them centered properly. :-[

Best Regards
Nuby

Offline SmAsH

  • Supreme Robot
  • *****
  • Posts: 3,959
  • Helpful? 75
  • SoR's Locale Electronics Nut.
Re: Power Regulator $50 Bot ans Centering Servos
« Reply #3 on: July 19, 2009, 09:41:30 PM »
1. that one just uses a 7805 which puts out 5V...
2. you could just use a single regulator...
3. you just send a 1.5ms pulse every 20ms...
Howdy

Offline NubyTopic starter

  • Jr. Member
  • **
  • Posts: 28
  • Helpful? 0
Re: Power Regulator $50 Bot ans Centering Servos
« Reply #4 on: July 20, 2009, 12:40:56 AM »
1) The schematic shows both?
2) Not sure I get it. Just regulate the controller to 5V, how do I control the servos?
3) Do not know how to send the signal?

Best Regards
Nuby

Offline SmAsH

  • Supreme Robot
  • *****
  • Posts: 3,959
  • Helpful? 75
  • SoR's Locale Electronics Nut.
Re: Power Regulator $50 Bot ans Centering Servos
« Reply #5 on: July 20, 2009, 12:56:40 AM »
1. the $50 power regulation schematic consists of a regulator and a capacitor...
2. the servos get power direct from the battery, see attached picture.
3. you program your microcontroller to use pwm to send a pulse that is 1500us long to your servo, this will tell it to go to center position. using this code: http://www.societyofrobots.com/downloads/hold_servo.hex
Howdy

 


Get Your Ad Here

data_list