| Topic Title | Topic Starter | Posts | Time |
| Inverter improvements? | lerameur <lerameu... | 8 | 06:39:12 |
| removing condenser mic from a PDA and modifying ci... | Mad Scientist Jr <... | 5 | 10:33:24 |
| Dual Trace Sound Card Scope | scott93727g <eb33... | 3 | 19:44:59 |
| Sound operated light source | Maddy <mnitin73@[... | 6 | 20:04:20 |
