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T3SE: Charge Rate-Controlled Solar Engine: The all-transistor T3SE works much like a conventional SE: like the Tritium, it
fires when the charging current drops below the minimum and after the circuit triggers, positive feedback is used to latch the circuit, resetting at a fixed voltage on the main cap.
(added 11/05) |
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The D1 solar engine: Nocturnal-Controlled Solar Engine: The D1 solar engine is the original nocturnal solar engine
design. The design is simple, tuneable, but no longer terribly useful (I include it here just for purposes of education and folks' historical interest). (added 11/05) |
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Train Detector using Ambient Light and a Photocell: (circuit / schematic design added 6/06) |
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Tritium: Charge Rate-Controlled Solar Engine: The Tritium circuit was the first (to my knowledge) type 3 SE. As such, it is
quite experimental, and should be regarded as a prototype rather than the 'state of the art'! Nevertheless, it does function reasonably well, and in some circumstances outperforms other solar
engines such as the Freds that I have lying around. (added 11/05) |
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Using the LM555 Timer with Photocell Detectors: (circuit / design added 8/03) |
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Variable Threshold Solar Engine: Voltage-Controlled Solar Engine: The "Variable Threshold Solar Engine" is Wilf
Rigter's 1381-based design -with a variable "trip" threshold. (added 11/05) |
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Variations on the PWM DC Motor Speed Control: (circuit / design added 8/03) |
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Visible Light Photo Detector Circuits (E+F): (circuit / schematic design added 6/06) |
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VTSE: Variable Threshold Solar Engine: Voltage-Controlled Solar Engine: The "Variable Threshold Solar Engine" is Wilf
Rigter's 1381-based design -with a variable "trip" threshold. (added 11/05) |
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VX2SE: Voltage-Controlled Solar Engine: This is Wilf Rigter's voltage-doubling solar engine design; very useful for loads
that require higher voltage (like those "super-bright" LEDs). (added 11/05) |
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Zener Based Solar Engine: (circuit / design added 8/03) |
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Zener-based: Voltage-Controlled Solar Engine: This design uses a Zener diode to determine the voltage trip level.
Simple variants of this design use LEDs or plain old diodes in series to accomplish the same thing. (added 11/05) |
