Hi Wilf, Thanks for that. I've moved the chips around a bit, but still no luck. I may have a go at building the circuit on some perfboard to see if that makes...
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 4, 2006 3:13 am
54701
I have posted a fade in fade out (fifo) pummer that operates as you described. The circuit consists LM358 dual opamp, one of which is used for a new...
Hi Wilf, ... The voltage on pin3 does not go to zero when pin1 goes low. Where does this 'input current' come from? (Err...I know that's bad grammar, but...). ...
Hello all!!! This is just a friendly reminder about the December Buildfest on the 9th starting at 10:00 am. I also wish to inform all those who wish to have an...
LM358/LM324 opamps have PNP darlington input transistors connected as differential pairs allowing these single supply opamps to sense signals near ground. ...
Thanks, Wilf. I remember you mentioning these PNP input transistors before, a few months ago, but it must have gone in one ear and out the other. It makes...
I have recently purchased the symet kit from solarbotics. As I am working with some student on this I would like to be able to explain how current is traveling...
... Many of the standard BEAM circuits have had their workings explained by Wilf, or others, in the past. The collective wisdom has been accumulated on...
Hi Nate, You mentioned a small capacitor attahced to the FLED in the symet Solar Engine. Is this a FRED SE? Do you have a link to the actual circuit you are...
Wilf - Thanks. Here is the link to the FLED SE - http://downloads.solarbotics.com/PDF/Symet_parts_bundle.pdf Nate ________________________________ From:...
Hi Nate! Ok, this is how: Wilf Rigter contributes this more-detailed explanation: The FLED <http://encyclobeamia.solarbotics.net/articles/fled.html> is a ...
Dave Hockeyrink wrote in a while ago, saying he'd been playing with the FLED SE and had found that a small capacitor across(?) the FLED helped to stop it...
Thanks for the link Nate, I see that the otherwise excelent PDF includes the small cap in the freeform assembly photos but makes no mention of it or its...
Hi all. I'm getting readdy to build my first walker. right now I have two options. #1 a one motor walker( this seems less complicated) will a 74AC240 work...
Hey all I've been trying to set up my recent robotics project, but have reached a small snag in getting the infrared photodiodes to work. I bought them from...
Hi folks Mouser claims that the the TS831 series (from STMicroelectronics; data sheet at <http://www.st.com/stonline/books/pdf/docs/6126.pdf>) are suitable...
Firstly I would apply a load resistance. 100ohms would me fine for this. Being as this is a photodiode it will only work one way, and so it seems you have...
Greetings Wilf, As I have learned from others, this is a very special day for all BEAMers. I offer the following in recognition of the thousands of posts and...
... they ... ensure ... Thank you Tom. I have one, but need to upgrade to a digital one. thanks for the codes. jabmectech ... two ... will a ... som...
Wilf day (the 8th, today) is the anniversary of the Wilf's first BEAM post. Inspired by Richards wonderful poem, I offer a haiku in honor of Wilf Day: When...
Thanks so much Richard and Scott and everyone else for your compliments and appreciation of my work. It is really the critical mass of all our contributions...
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