Timeline for Why PNP transistor might be opened even though (almost) nothing is connected to the base?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| S May 18, 2015 at 21:25 | history | suggested | Kamil Szot | CC BY-SA 3.0 |
spelling, emphasis
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| May 18, 2015 at 20:44 | review | Suggested edits | |||
| S May 18, 2015 at 21:25 | |||||
| May 18, 2015 at 20:42 | vote | accept | Kamil Szot | ||
| May 18, 2015 at 20:09 | history | edited | Spehro 'speff' Pefhany | CC BY-SA 3.0 |
added 463 characters in body
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| May 18, 2015 at 17:29 | comment | added | Kamil Szot | I already have some resistors between base and emitter as a part of the circuit. I edited the question to add link to circuit. | |
| May 18, 2015 at 17:29 | comment | added | Kamil Szot | I won't be able to measure the current. My meter has damaged mA feature. | |
| May 18, 2015 at 17:26 | history | edited | Spehro 'speff' Pefhany | CC BY-SA 3.0 |
added 182 characters in body
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| May 18, 2015 at 17:24 | comment | added | Spehro 'speff' Pefhany | A cure for leakage is putting a resistor right where you put that capacitor (emitter to base). | |
| May 18, 2015 at 17:16 | comment | added | Spehro 'speff' Pefhany | Then it is leakage (or you missed a resistor!). Try measuring DC current from emitter to base. | |
| May 18, 2015 at 16:58 | comment | added | Kamil Szot | I soldered 1uF ceramic (105J63) on the other side of pcb. It didn't help. Transistor is still open from the get go. | |
| May 18, 2015 at 16:43 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 3.0 |