A "capacitor-dropper" circuit can also be used to drive an LED directly from the AC line; despite its apparent simplicity, it's actually a circuit with subtleties and also has some regulatory/safety issues (upper: 230 VAC and lower: 110 VAC)
| Authors | Bill Schweber |
| Main Document | Article «Classic neon lamp can resolve your AC power indicator mandate» |
| Description | Figure 2 |
| File Format / Size | PDF / 9 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Classic neon lamp can resolve your AC power indicator mandate»
- Figure 1. It's not hard to drive an LED indicator from the AC line, but it requires many active and passive components
- Figure 2. A "capacitor-dropper" circuit can also be used to drive an LED directly from the AC line; despite its apparent simplicity, it's actually a circuit with subtleties and also has some regulatory/safety issues (upper: 230 VAC and lower: 110 VAC)
- Figure 6. This detailed view of the three discharge zones shows some subtle effects and transition points
