Reposting a question that may have gotten buried in the religious debate of earlier this week.... A year ago Wilf posted a circuit that makes a highly...
Richard Torrens is truly an analogical genius. Note that the UltraSonic transmitter circuit oscillates at the natural 40kHz frequency of the transducer and the...
Hi Chris, The LM358 has a standby current of 1ma so the FIFO circuit will need to be isolated. Use a 74AC240 with a diode and the solar cell connected to the...
Small ultrasonic transducers are placed into garden ponds to make "fog" floating over the pond. You guys gotta get out more. ;) This time of year they are...
Hi. I can't seem to get this circuit to work. it is the barebones photohead the Solar version By Grant M. I'll post it. the solar cell is putting out 4.5V and...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the beam group. File :...
beam@yahoogroups.com
Dec 1, 2007 8:23 pm
57082
Most interesting captn, I never saw these before. The price is right but those transducers are designed for coupling accoustic energy to a fluid and may not ...
Jab, To answer your query, we need to know the circuit your using. R. Williams ... From: "jabmechtech" <jabmechtech@...> To: beam@yahoogroups.com Sent:...
Richard, this is the circuit I'm using.not the one I uploaded to files. . http://grant.solarbotics.net/images/Circuits/BBPH_AL.gif the Solar cell is strong...
Hi. I got it to work WITHOUT the solar engine. I just cliped the miller off ,at the leads, and hooked it up to 3vdc. The Miller works on its own,so I'll use...
... miller ... its ... is ... here is a video of it, it is looking for a shadow not the light. http://www.youtube.com/watch?v=p2_jidVlrlg build your dreams ...
... Maybe you're not getting enough power from the solar engine to drive the motor? That's a fairly hefty motor and head ass'y you've got there. Simon...
Hi, Wilf, Thanks for your very helpful suggestion. I grounded all inputs and linked all the outputs on the AC240 and it worked first try, first tested with...
I'm confusing the two types of piezo transducer, one for ultrasonics and the other for audio. :P There's certainly a lot to be learned on the 4QDtec site. ...
couple of problems conspire against solarizing the FIFO. 1) The FIFO LED peak current (30ma) on time is 100x longer than the pummer current pulse. 2) The FIFO...
Hello guys! How's everyone doing? 'Hope you're fine and well. :) Ok, so here's some additional pics/infos on my site. Have fun everyone and goodluck to all!...
Jab, Im not the expert at circuit analysis, however, here is what I see. The 74 254 is being used for both source and sink as a motor driver. (Is their a...
Hi. I got it to work with battery power, and It works quite well. compared to the other headbots I've made. http://www.youtube.com/watch?v=kGKqypcrWCk here it...
I'm trying to finish off my 5 motor walker, using the same circuit as yours Harold, as I got 5 sweet motors from my trip to Singapore, 3V@35RPM. Just been...
Wilf, I appreciate your educating me on the virtues and limitations of the FIFO circuit. A reminder of the need for parsimony when placing demands on solar...
Hello Gary! Yeah, that's nice! Yes, many asian countries produce nice-looking gear motors (I wish I could also buy them). Well, in regards to the PNC stuff,...
Greetings all, it's been awhile since i posted here. I'v been busy with my electronics course. :D I have a question regarding the use of certain IC's. The...
Bty12806393 asked: Monday, December 03, 2007 8:49 AM ... A world of details are swept under the rug with that "taking electrical compatibility into account". A...
Hi again Gary! Can you show us the motors or gear motors you got there with you that you bought in Singapore? I'd like to see it too. Thanks and take care! ......
Hey Harold, Rather than hijacking your discussion, i'm creating a new. About the motors, i'll post a few pics when I get home. Gary T ________________ Reply...
Well, I'm here in my graveyard shift at work... Anyways, I'm looking forward to see another walkman clone. This gonna be fun! :D Keep it up! ... that ... care!...
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