http://www.solarbotics.net/library/circuits/bot_walker_phototrope.html Have a look at the 74HC125 at the photo-bridge, the enable pin goes to VCC, making the...
I have a 5w 12v solar panel that I'm using I need advice direction, etc... I have no battery back up & need to Know what products I will need to make one...
You are absolutely right Charley, the photobridge PWM oscillator 74HC125 buffer enable pin should be connected to ground (not to Vcc as shown). Alternately...
The good news is that you already have the three most important parts of the system and it probably won't take much to marry them together. Just to clarify,...
thank you very much for the quick reply wilf i will give that a go!!! again thank you ... circuit ... suitable ... when ... cell ... in ... cell ... can use ...
I guess learning has become easy this days, maybe a better way to teach via video tutorials, check this out http://mechanicalebook.com/videos.htm Randy...
Ok now my novice comes to lite. SOLAR PANEL IS 6W WORKING VOLTAGE EQUAL TO 12V CURRENT 400MA, THE BULB IS 12VDCL60F-PAR20 uses 2-3 watts of power[ i could...
Hi everybody, new guy here! Just want to say thanks for letting me join the group. I have been interested in beam robots for a little while now and have made...
Some simple calculations based on approximate values will tell you how these can work together. The SLA battery is rechargable and provides 1.3AH x 12V = 16 ...
During my experimenting with SE circuits I came up with a dark activated version. When the phototransistor is shaded the circuit works as a normal SE. I have...
I'm wondering if anyone has any cautionary tales about wiring up an NE555 timer? I'm not sure if timers are "beam" as such - but I don't see why not. In any...
Hello, I haven't built a 555 BEAM circuit yet but found this : http://solarbotics.net/library/circuits/bot_popper_555.html maybe that helps.........and yes the...
Thanks, I think I am wiring it up properly though - just looking for any cautionary tales. Incidently, are pins 5 and 7 left to float on those circuits? I can...
hi erik, pin 5 is control voltage. if you connect it to ground, then the circuit will not work. you can use an capacitor (not necessary!) to ground (0.001µF)....
Manfred Schaffran
Manfred.Schaffran@...
Jul 4, 2008 9:47 am
58048
Whoops.. i just got confused.. You say that I shouln't connect pin 5 to ground, but should instead connect it to a low-F cap and then to ground - but that the...
hi erik, just to explain: pin 5 open - all works ok. pin 5 with an cap to ground - ok, but not needed. pin 5 direct to ground - circuit won't work hope that...
Manfred Schaffran
Manfred.Schaffran@...
Jul 4, 2008 11:49 am
58050
Fantastic. Thanks. I think I killed most of the 555 chips, but there's one or two that are ok. Thanks for your patience, and persistance. On Fri, Jul 4, 2008...
Welcome! Can you tell us a little about the performance of your SE and post some photos? regards wilf ... join ... now ... been ... to ... due ... cells ... ...
I have posted photos of my robots here: http://tech.ph.groups.yahoo.com/group/beam/photos/browse/e16d The photo of my first robot isn't the best because it was...
Hello! I'm just wondering if anybody here has used either CIGS (Copper Indium Gallium Selenium) thin film cells or Grätzel cells (i.e. dye-sensitized solar...
That sure sounded like a commercial advertisement to me! Myc On Sat, Jul 5, 2008 at 3:44 PM, Antti Karvajalka <antti10001@...> ... That sure sounded like...
I have made my first pummer and uploaded two photos to my album. http://tech.ph.groups.yahoo.com/group/beam/photos/browse/e16d?c= It has 3 x .22F 5.5V tiny...
... I apologize the tone, but I thought that it would be just good to include the URL's, so that people would see what I'm talking about. And yes, it's often a...
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