3 ms·
Vy any chance, did you write about the project somewhere? I have a similar project on the back burner, but with a rotary-dial handset, and I doubt a pi could pr
by sangnoir 4y ago
Vy any chance, did you write about the project somewhere? I have a similar project on the back burner, but with a rotary-dial handset, and I doubt a pi could provide enough juice to ring.
- franga2000 4y agoI plan to write a blog post about it soon™, but my schedule is absolutely packed this month, so probably not for a while. Here's a placeholder link: https://m.frangez.me/PhoneBooth https://m.frangez.me/PhoneBooth I'm using two of those 2€ sound cards from China to drive the handset and ringer speakers and both work quite well. I would probably need to add a small amplifier if I wanted the ringer to be heard from the street through the metal enclosure and plexiglass booth, but that wasn't a requirement for this project.
- CapitalistCartr 4y agoIn North America, ringing takes about 100 volts, but any control will do. Link the control circuit to an ice cube relay, then have that control the higher voltage.