1) Assuming 5 volt supply with a desired current of 10 mA at Pin 1 of the MOC3032 (see diagram), should Rin be 500 ohms? R=V/I
=5/0.01
=500Ω
![moc3032Resistor.png moc3032Resistor.png](https://www.electro-tech-online.com/data/attachments/52/52812-43741f6e7d319c2d81cc227a268756ba.jpg)
2) If I follow the datasheet of the MOC3032 and use a 1K ohm resistor at Pin 4 and open the switch to Pin 1, the Emitter of the triac remains high. If I change the 1K ohm resistor to a 590 ohm resistor then the Emitter of the triac will go low when the switch is opened. How do I accurately calculate the desired resistor size on pin 4 of the MOC3032? Note- I am using 24 VAC instead of the 115 VAC of the datasheet.
![MOC3032PullDown.png MOC3032PullDown.png](https://www.electro-tech-online.com/data/attachments/52/52813-959c9e34a05c4f283363fcb757e4a4b3.jpg)
=5/0.01
=500Ω
![moc3032Resistor.png moc3032Resistor.png](https://www.electro-tech-online.com/data/attachments/52/52812-43741f6e7d319c2d81cc227a268756ba.jpg)
2) If I follow the datasheet of the MOC3032 and use a 1K ohm resistor at Pin 4 and open the switch to Pin 1, the Emitter of the triac remains high. If I change the 1K ohm resistor to a 590 ohm resistor then the Emitter of the triac will go low when the switch is opened. How do I accurately calculate the desired resistor size on pin 4 of the MOC3032? Note- I am using 24 VAC instead of the 115 VAC of the datasheet.
![MOC3032PullDown.png MOC3032PullDown.png](https://www.electro-tech-online.com/data/attachments/52/52813-959c9e34a05c4f283363fcb757e4a4b3.jpg)