Troubles making a BEAM bot (Miller engine) Answered
I'm just getting involved with the wonderful BEAM bots.
The problem is that here in Germany I don't get some of the transistors and I have to find alternatives.
Instead of the 2N3904 I use the BC546, for the 2N3906 I use the BC556 and for the MN1381 I use the TC-54.
I'm attaching the datasheets - did I get it right that I only have to "turn the BC556 around" so the pins fit?
However, I don't get the Miller engine working!
As a solar cell I use a Panasonic BP-376634 (3,4V - 30mA)
As capacitors I used different ones. The motor is a tiny cell-phone vibrating motor - I guess one of the tiniest.
As a resistor I'm using a 2.2K.
All in all I tried to follow these diagrams: http://www.solarbotics.net/library/circuits/se_t1_1381.html
I also uploaded some photos - maybe you can make out mistakes I made...
Hoping for your help!