Timeline for Hard wire 5V DC home alarm system to 29V AC Output
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 2, 2022 at 23:09 | answer | added | Harper - Reinstate Monica | timeline score: 1 | |
| Jan 2, 2022 at 9:56 | answer | added | bobflux | timeline score: 0 | |
| Jan 2, 2022 at 4:45 | answer | added | Gil | timeline score: 0 | |
| Jan 2, 2022 at 2:46 | answer | added | DrMoishe Pippik | timeline score: 1 | |
| Jan 2, 2022 at 0:46 | comment | added | Dean Kuga | Also, in case anyone is wondering, the old alarm was Honeywell 6150RF... | |
| Jan 2, 2022 at 0:45 | comment | added | Dean Kuga | Thanks everyone, after some more searching I was able to find this UMLIFE AC/DC to DC Step Down Buck Converter which should do the trick according to specs. If it works I'll post an answer. | |
| Jan 2, 2022 at 0:38 | comment | added | Ecnerwal | 29VAC does not come from a battery. | |
| Jan 2, 2022 at 0:06 | comment | added | user3208715 | I would look more closely and probe around that old ADP alarm system. Something is providing it ~120V and it is getting stepped down to 29V. Could be that 120V is headed into a battery somewhere and then the 29V is coming off the battery to the alarm system. | |
| Jan 2, 2022 at 0:03 | comment | added | dandavis | tie the AC into a full bridge rectifier w/ smoothing capacitors, then run the unregulated DC output to a DC to DC buck converter to output 5v. you can buy rectifier modules, and use a 24vdc to USB adapter, commonly sold for RVs, to get the 5v; it shouldn't mind the slightly higher input voltage. | |
| Jan 1, 2022 at 23:42 | comment | added | Harper - Reinstate Monica | Search that thing for a UL, CSA or ETL mark. If none, throw it in the trash and use any USB adapter with such a mark. Ikea's are excellent, and Apple's larger blocks are the best in the business and readily available "new unused" on eBay cheap. (One comes with every iPad, and schools throw them away in favor of gang chargers). | |
| Jan 1, 2022 at 23:25 | comment | added | Ecnerwal | You have a picture of an AC to DC kit right there in your post. Of couse, its input voltage range does not go low enough for the weird thing you want to power it from. Trivial to build if you know how, or learn what you'd need to learn, - probably impossible to buy off the shelf for that input voltage. If the old alarm system is disused, go where it gets its power from, disconnect the 29VAC transformer, plug in your 5VDC power supply, and you'd be down to cutting and connecting cables to re-use the wires in the walls. Otherwise, run a new AC outlet to the closet in question. | |
| Jan 1, 2022 at 23:13 | history | asked | Dean Kuga | CC BY-SA 4.0 |