Illum
Flashaholic
Following the calculations here: http://www.daycounter.com/Circuits/...Supplies/Transformerless-Power-Supplies.phtml
With the circuit as follows:
Using:
Vrms: 120V, 60Hz
R1: 6.8 ohms
C1: 1uF 250V Metal film
C2: 470uF 25V Electrolytic radial
D1: 1N5818
ZD1: 1N4733 5.1V 1W Zener
The calculations yielded:
Iout: 25.8ma
I have a couple Kest# KS2E-M-DC5 relays, 5V coil with 130 ohm resistance, or about 38ma max. My question is very simple: Must I attain 38ma in foward current in order to trigger the relay? or will 25.8ma suffice?
Building a couple blackout lights that uses a relay to monitor line voltage that closes a switch to an LED when power fails
With the circuit as follows:
Using:
Vrms: 120V, 60Hz
R1: 6.8 ohms
C1: 1uF 250V Metal film
C2: 470uF 25V Electrolytic radial
D1: 1N5818
ZD1: 1N4733 5.1V 1W Zener
The calculations yielded:
Iout: 25.8ma
I have a couple Kest# KS2E-M-DC5 relays, 5V coil with 130 ohm resistance, or about 38ma max. My question is very simple: Must I attain 38ma in foward current in order to trigger the relay? or will 25.8ma suffice?
Building a couple blackout lights that uses a relay to monitor line voltage that closes a switch to an LED when power fails