Timeline for Transistor Toggle Not Working
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| May 12, 2013 at 22:06 | comment | added | Kortuk | @MichaelKaras I would note, I was attempting to explain what he was making here, which he should really be buying an SCR for, not putting two transistor back to back for a poor approximation. | |
| May 12, 2013 at 22:04 | history | edited | Adam Lawrence | CC BY-SA 3.0 |
typo correction
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| May 12, 2013 at 21:54 | history | edited | Kortuk | CC BY-SA 3.0 |
changed component values again.
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| May 12, 2013 at 20:24 | history | edited | Kortuk | CC BY-SA 3.0 |
corrected values to be more reasonable
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| May 12, 2013 at 20:14 | comment | added | Michael Karas | @Kortuk - The original posters schematic does not show the load so we cannot determine if the powersupply is shunted or not. When showing what you did in your posting you are doing a disservice to the engineering community as shown because many could come here and believe it to be the way to go because the poster gave you the green check mark. Please at least change the component values in your diagram to a realistic set of values. | |
| May 12, 2013 at 16:59 | comment | added | Michael Karas | The circuit as shown is not a suitable design. The base current that the PNP is expected to pass will be well over 450 mA. Same thing for the NPN. The total current through the load would be over 900mA. Both these numbers are well over the nominal ratings for the components shown. As a matter of fact the maximum sustained current on the base of a small signal transistor like these should not be more than a small number of mA. The maximum collector current of either device should be limited to less than 200mA. | |
| May 12, 2013 at 16:30 | comment | added | Nathan Campos | Thanks very much for your help, the circuit is working perfectly! Also, I was playing around with it and if I put a button to short the base of the PNP to ground (or the base of the NPN to Vin) I can turn the output off. | |
| May 12, 2013 at 16:28 | vote | accept | Nathan Campos | ||
| May 12, 2013 at 16:08 | history | answered | Kortuk | CC BY-SA 3.0 |