Somimoro
@ March 3, 2009
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Weight:
50 grams
- Actuators / output devices: two motors + modular
- Control method: autonomous
- CPU: picaxe 18x
- Power source: Solarbotic SCC3766 solar-cell
- Sensors / input devices: modular
it's the ultimate solar rover
based on Picaxe 18X
it soaks only 25 uA in idle mode
it have a brain
it's i/o modular through 2.5mm strips
it's efficient
it's small (L:66m W:37mm)
the nemesis of beam robots
asd
the actual schematic
@ Thu, 2009-03-19 03:37
hey! can you tell me where
@ Thu, 2009-03-19 10:25
it's a Solarbotic SCC3766
it's a Solarbotic SCC3766 solar-cell
rated 6.7V @ 30mA
bought here in italy from a Solarbotic distributor
@ Thu, 2009-03-19 00:04
funny
That is so funny, how it's starting to move and stops again immediately. But with a bit of patience it still gets there!
@ Thu, 2009-03-19 00:21
yeah tis is a test made with
yeah tis is a test made with 100W light bulb
under direct sunlight i expect great activity
@ Thu, 2009-03-19 00:00
that's it the Somimoro with
that's it
the Somimoro with bigfoot drivetrain
it's 40% less eficiet opposed to original lo-frictionsetup
anyway it' acceptable and with this setup it can seriously rover the envirenment...or not?
TODO
develop more I/O modules (feelers, lights, buzzers, ir,......)
glue a piece of pvc to fix drivetrain mechanical stability
@ Thu, 2009-03-05 22:07
i have uploaded last
i have uploaded last schematic
@ Thu, 2009-03-05 19:54
Schematic
This bot is awesome awesome awesome! You MUST post a schematic of the circuit for us.
[EDIT] Just saw that you did.
@ Thu, 2009-03-05 16:17
Smooth Design - "hello look at me"
Nice low-rider design - is it a line follower (from the downward facing photocells).
The knocking capacitor is brill - gives it a "hello look at me"- "hello look at me" behaviour ....super
@ Thu, 2009-03-05 18:16
One chip solution
We had a major snowstorm on Monday and I got a chance to take a serious look at your circuit. I dug some parts out of my junkbox and tried a few things:
1. The motor driver chip is not needed if you use a PICAXE 20M. There are 9 output pins and 3 ADC's. 8 output pins can be used to drive the 2 motors and the 9th used to power the CdS sensors and voltage reference., The design is easily transfered.
2. The little gear / pager motor is really quite efficient and requires about 25 ma. This means that it can be driven by a single output pin on the PICAXE. Yes it does work. This means only 4 pins are required to drive the motors.
3. You will need to prioritze the rsponse to the CdS and microswitch sensors. The ADC readings of the CdS will never be the same and with only a 50 millisec pulse to the moters before sleep, you will never get past the CdS response to check the micro switches and you with have a standard SMARTBEAM Photovore.
4. Because of the internal resitance of the memroy backup caacitors, you may not get a large enough current pulse to drive the motors. I haven't tried this yet woith the little geared pager motoers, but it has happened with regular motors. ****I have now tried the 0.047 memory backup caps and they do work! The trade off is a very long poriginal charging of the cap.
TANSTAAFL!
Myc
@ Thu, 2009-03-05 22:19
1. 2. I have no
1. 2. I have no experience with picaxe output current capability, those gearmotors are rated to soak 180mA stalled. I do not know how can respond picaxe output at his level of current demand. Anyway in this aplication the size is not so critical. I will try to use your advice for the next robot: the 1 inch cubic bot
3. please be patient, my english is crap and i can not understand what you mean
4. agree, many backup caps do not provide enought current to drive motors. Now I am trying to fit a 6,3v electolitic cap . In the pic the cap is a 16v