Timeline for DIY: How to get 110VDC from AC
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 9, 2016 at 12:33 | comment | added | D.A.S. | use555 timer , invert and drive 2 transistors may lead to smaller C values or FET & cap as @jonk showed with same 1:10 boost 10VA transformer | |
| Sep 9, 2016 at 12:27 | comment | added | D.A.S. | yes 10W will ring an old phone or two easily start with phone impedance work back to >20* Rce , where Rce= Vce(sat)/Ipk to compute using hFE=20, then R values then C for 25Hz or use555 timer | |
| Sep 9, 2016 at 7:35 | comment | added | user400344 | And would a 12V/1A supply be sufficient? | |
| Sep 9, 2016 at 7:29 | comment | added | user400344 | 12V input - What about the properties of the transistors and other components? I never generated AC before. Got a bunch of TIP120s laying around... My resistors are all for 0.25W. Got insulated copper wire of the type used for coils as well - how many meters do I need? And coil turns + diameter? | |
| Sep 9, 2016 at 3:54 | comment | added | D.A.S. | @user400344 This does not operate off the power grid 50/60 but inverts Dc to a 25Hz bell ring tone for old solenoid bells. so look for a .240>24 XFMR and use in reverse @ jonk Imagine that inverter would work as well if you can find the transformer, | |
| Sep 8, 2016 at 19:07 | comment | added | jonk | @user400344: Found this link yesterday, which the above schematic reminded me about: next.gr/telephone/ringers/… | |
| Sep 8, 2016 at 8:10 | comment | added | user400344 | Cool design - what reference formulas do you use to calculate coil turns and diameter? Note: we use 230V @ 50Hz here | |
| Sep 8, 2016 at 4:13 | history | edited | D.A.S. | CC BY-SA 3.0 |
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| Sep 8, 2016 at 4:04 | history | edited | D.A.S. | CC BY-SA 3.0 |
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| Sep 8, 2016 at 3:57 | history | edited | D.A.S. | CC BY-SA 3.0 |
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| Sep 8, 2016 at 3:52 | history | answered | D.A.S. | CC BY-SA 3.0 |