Table 1. List of Components Used in the Electronic Timer (Figure 1), "On-Off" Switching Circuit (Figure 2), and Noncircadian Timer (Figure 3) | |||
Figure 1 | Figure 2 | Figure 3 | |
---|---|---|---|
Resistors | |||
1 kohm | 1 | 1 | |
1.5 kohm | 26 | 2 | |
10 kohm | 1 | ||
20 kohm | 1 | ||
47 kohm | 1 | ||
CMOS Integrated Circuits | |||
CD4001 | 1 | 1 | |
CD4017 | 8 | 2 | |
CD4075 | 1 | ||
CD4081 | 1* | ||
CD4082 | 1+1* | ||
Miscellaneous | |||
SPST switch (NO) | 2 | 1 | |
IN4001 diode | 4 | 1 | |
Red LED | 26 | 2 | |
470-microfarad capacitor | 1 | ||
2N2222 transistor (Q1) | 1 | ||
12-V ac transformer | 1 | ||
SCR 25-50 V (Q2) | 1 | ||
Triac 200-400 V (Q3) | 1 | ||
SPDT 12-V relay | 1 |
JOHN A. BYERS Department of Entomological Sciences, University, of Califomia, Berkeley, California 94720 Present address: |
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