Cheers! Just built my first Symet a few days ago. First I used just one SC3733 solar cell from Solarbotics with Miller Solar Engine (with 1381-C). Worked...
Cheers, I wonder if any caution is necessary when I use an unmodified Miller Solar Engine with say 1381-C os 1381-L trigger with Solarbotics' SC3766 solar cell...
I have used schottky diodes for their low drop and they work great. I use 1N5819 schottkys. Just in case you are unaware, solar cells in series increase...
The voltage across the main storage cap of an Miller Solar Engine is is a kind of sawtooth waveform whose amplitude is limited by the operation of the MSE...
... Thanks!, will be buying them on my next trip to the city. ... Yes, I knew _that_... ;-) In my Symet the four cells are in parallel. Is there anything to...
Thanks man, I really appreciate it, but I think I found a good substitute. I didn't realize solid PVC would be so heavy, But i fount that by sticking a 1/2"...
All I know about the two different colour solar cells (brown and blue) is that for a given area of solar cell the brown ones produce less power but will work...
Hi again! So I'm using this circuit: http://www.beam-online.com/Robots/Circuits/circuits.html (FLED Solar-Engine 1/3 down the page) Now I think I've found the...
I just finished a symet that I am calling the Brass Beast. It doesn't perform as well as I hoped, but it does work. I have photos and a project write up posted...
Hi Wilf and thanks for responding well everyone that is. well im using a a NI-CD AA700mAh 6 volt rechargable battery that is gonna power two gear motors which...
Hi Shawn, Ok, 6V for the supply voltage is one part of the puzzle. Now If you have a ohmmeter handy, can you measure the resistance of the motor windings?...
Hello everyone, I'm a newbie here. I've built a handful of solarbotics bots (the dragonfly one and a photopopper) as well as some other non- robot projects...
Hi Dan, Believe it or not, those are real solar cells, just a different design. If you want a smaller higher voltage solar cell then you can find them on the ...
well this is the first time i have done this with a motor. i put my meter on the ohm setting and when i hooked up to the motor it came up with a constant 3.8...
Excellent! That means that, when stalled, the motor draws 6V/3.8ohm = 1.58A. WHen the motor rotates unloaded the current drops to about 10% or 160mA. These...
Actually it is a rebuilt symet. I had just finshed my symet, which I had affectionately named the Brass Beast. It sure looked good, but its perfomance was very...
Wilf thank you very much for the input on motors. i am not all that familar with motors at all. i really aprrietiat or whatever that word is in doing this...
hello fellow beamers, im jigs from the philippines. just wanna know how many pinoys are in here? having difficulties finding parts for beam bots. thanks!...
I need a bit more power because my bot is turning out a bit heavier than planned. I started to order some motors that had more torque, but I realized I might...
Hi, what you you need to figure out is how much the weight and torque have increased compared to the old measure. If the torque has increased compared to it's...
As far as I can figure out the new weight of the battery is 121.9% of the old battery weight, where as the new torque is 135.71% of the old torque. In other...
Consider the following: 1) The change from 4.8V to a 6V battery does not necesarily mean an increase in battery weight. I suggest two LiPo batteries of same ...
Perhaps jump start the thread by asking some hands-on questions like what kind of battery you were proposing to use? wilf ... internal ... heavier ... torque, ...
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