- Sun, 2013-09-15 17:50
- 0 Comments
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Example of using a 555 and a couple of transistors to make a 5V DC to 9VAC 1A convertor.
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This is an example, I have not tested or done the second level of math verification.
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Other comments would be to bypass the Voltage at the center tap on the primary side and possibly diode protect, and the 555 and 2N3904 could be replaced by a CD4049 wired as an astable multivibrator using an inverter stage to create inverted drives for the transistors.
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The TIP120 Darlingtons are good for lots of gain and handle 5A, regular Bipolar Transistors could be used by looking at specifications.
- Fuses, indicator lights, fire exstinguishers are all oprional and may be needed.
Example Transformers: NOTE these have not been fully qualified and would need to be checked for saturation, final volate generated, etc.
Hammond Mfg #166J33 |
33VAC CT |
33VA |
1A Secondary |
Digikey# HM563-ND
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Mouser # 546-166J33 |
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$22.92 |
Hammond Mfg #166K35 |
35VAC CT |
52.5VA |
1.5A Secondary |
Digikey# HM564-ND
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Mouser # 546-166K35 |
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$30.54 |
Hammond Mfg #166J36 |
36VAC CT |
36VA |
1A Secondary |
Digikey# HM567-ND
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Mouser # 546-166J36 |
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$24.26 |
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