... I had the exact same symptoms and my problem was the 555. It could be the 2n2222, also. I would swap the transistor first, seeing as it is easiest to...
Hi sorry for the late reply: The 'goo' is a lubricant called lubraplate a white grease used to lube this kind of device. I do not know is it is still made. ...
Hey Wolfgang I replaced the 555 last night still same thing. I cleaned and re soldered and cleaned all the solder points. I also noticed that when I point a...
Happy New Year, all! My walker is finished. As a proof-of-concept model, it works well. If it approaches a wall at a shallow angle, the forward sensor on the...
Hey Tom Very sharp looking walker! You'll have to bring/or send it to compeat in the next ECRG! Gord ... __________________________________ Do you Yahoo!? Find...
Hey after trying for over a week. I think I came up with a fix for the non working sensors. I ran a jumper from batt2 positive to P1 pin 27 (3rd pin fron the...
I want to buy a few parts from Digikey but the numbers dont match. Does this make sense? 74AC14 = SN74AC14N, 296-4301-5-ND 74HC14 = CD74HC147E, 296-14513-5-ND ...
Thanks, Gord. Toronto is on the other side of the continent, a bit costly for me to get to. Will have it for WCRG in May, for sure. If there are still any...
2 out of 3 seem alright but 74HC147 is an encoder and the number you are looking for instead is 74HC14 = CD74HC14E, 296-12786-5-ND in a 14pin DIP package wilf...
David & Grant: I am ashamed to admit it, but to date; I have not built a successful solar powered Turbot. I have build battery powered ones. But the correct...
I have been interested in constructing a few robots for a while, but looking at schematics i am unable to determine what types of motors would need to be used...
Hi Gord, The fix you have would be bypassing the rear red indicator LED. Normally the 38kHz signal is sent through three series LED's , the two IR's and the ...
Hello Phil, Be ashamed of nothing of the sort! It took about four prototypes before I got a solar turbot showing a strong phototaxis in timelapse videos. Still...
Steve I have built a couple of edgebots using solarbotics gearmotors (GM2). Though not competition calibre, they work well. The radioshack hobby motors are...
DOUGH! Rear led ???? I just looked at the board and seen the spot for it for the first time. My kit is one of the workshop kits and dosen't mention the rear...
Thanks Grant I don't know how I missed the rear LED. It's in the docs. When I read you message. A bell went off. Goes to show ya. Check the docs more! I...
The best (only I know of) reason to get a single turn trim pot is that they are less expensive. I've found that multi-turn pots are easily worth the extra...
Hello everyone Happy New Year! I just took more pictures of my 5 motor robot, check them out on my site. I also drew up a block diagram of the sensor setup I...
Hehe. I forgot to explain the drawing. The two switches are left and right tactile sensors. The diodes lead to the waist reverser to make a back and turn when...
Ok, i have read up on motors and when you need a motor driver and such. But how does one determine 1. the current draw of a motor, 2. the resistance of a...
GrantM: Thank you, I feel now! The Miller SE is my favorite all-around solar engine. It is good, simple SE and easy to freeform. As for the stand-on-end...
... Hi, Wolfgang. I use the small 6 mm (1/4") single turn pots from Digikey. The problem with single turn pots is they can get very touchy when you need to do ...
... In general, you need to match the output current that the circuit is capable of with the current the motor needs to run. The first two circuits, using...
... Are they the "Hyper-Racer" (I think)? Them's the motors that retrofit into the GM2/3/8/9 nicely for pretty hot performance (and tremendous current draw). ...
... Hmm. there's one... It has a nice label (unusual, that. useful.) HYPERSONIC SUPER-SPEED MOTOR Imperial SUNTOY MOTOR Looks like they're still available...
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