Hi,
I was wondering if I could get some help on my first steps in electronics? I decided to start with a very basic B.E.A.M bot : the Symet of which you can find the circuit and the explanation here:
http://www.solarbotics.net/library/circuits/se_t1_fled.html
This is the picture I used to put the components in my breadboard:
http://junkbots.solarbotics.net/sample_chapter/hirez/F07-03-Breadboard-DSCN6783.jpg
...but it doesn't work
I have done some tests and this is what I came up with:
- solar cell + lead : 3.13V
- capacitors : 3.13V over each one
- resistor + lead : 3.13V / FLED-side lead : alternating between 0 and 3.13
- motor : 3.13V on BOTH ends
- if I disconnect the motor, the FLED flashes
- if I use a 1K to 10K transistor, the FLED flashes
- if I use a 22K transistor, I cannot see it flash
My BEAM book also mentions that if I can see the FLED actually flashing, the resistor is too low and I should put in a higher value resistor (I used a 22K to stop seeing the FLED flashing, although my book says it should be somewhere between 1K and 10K)
I don't know what kind of motor I have, but it runs great on a 12V battery and it looks very 'normal'. I think it is from an old cassette player.
Sorry for being such a noob, and thank you in advance!
I was wondering if I could get some help on my first steps in electronics? I decided to start with a very basic B.E.A.M bot : the Symet of which you can find the circuit and the explanation here:
http://www.solarbotics.net/library/circuits/se_t1_fled.html
This is the picture I used to put the components in my breadboard:
http://junkbots.solarbotics.net/sample_chapter/hirez/F07-03-Breadboard-DSCN6783.jpg
...but it doesn't work
I have done some tests and this is what I came up with:
- solar cell + lead : 3.13V
- capacitors : 3.13V over each one
- resistor + lead : 3.13V / FLED-side lead : alternating between 0 and 3.13
- motor : 3.13V on BOTH ends
- if I disconnect the motor, the FLED flashes
- if I use a 1K to 10K transistor, the FLED flashes
- if I use a 22K transistor, I cannot see it flash
My BEAM book also mentions that if I can see the FLED actually flashing, the resistor is too low and I should put in a higher value resistor (I used a 22K to stop seeing the FLED flashing, although my book says it should be somewhere between 1K and 10K)
I don't know what kind of motor I have, but it runs great on a 12V battery and it looks very 'normal'. I think it is from an old cassette player.
Sorry for being such a noob, and thank you in advance!
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