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Zener Set Voltage Signal Circuit (help) Answered

Hey Everyone- I have been researching on ways to send out an electric signal to trip a relay to shut off my battery charger. I did find some simple circuits and I did the math for what I would need and could not find big enough zener diodes and resistors.


Battery+(Resistor)(Zener Diode)(Relay Input)(Battery-)
I need this circuit to send a 8.2 or 10Volt 15mA signal to my Relay when the batteries reach 235 volts.
Following are the SPECS for the Input signal on my Relay:::

Control Voltage Range 3-32 Vdc 90-280 Vrms (60Hz) 18-36 Vrms/Vdc
Max. Reverse Voltage -32 Vdc - - - - - -
Max. Turn-On Voltage 3.0 Vdc 90 Vrms 18 Vrms/Vdc
Min. Turn-Off Voltage 1.0 Vdc 10 Vrms 4.0 Vrms/Vdc
Nominal Input Impedance 1500 Ohms 60K Ohms 9.0K Ohms
Typical Input Current 3.4mA @ 5 Vdc, 20mA @ 28Vdc 2mA @ 120 Vrms, 4mA @ 240 Vrms 3mA @ 24 V


Any help on this would be great Thanks!



Discussions

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steveastrouk

8 years ago

Use a resitive potential divider, to get the signal into the range of a simple comparator circuit.

Steve

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rc_rs_ss

8 years ago

no one can help me on this?>