help for relay set reset circuit

[deepakchikane]

i am looking out to design circuit for the following relay...
**broken link removed**
relay for single coil

i have made simple push pull driver with capacitor is in series with the relay....

but i want to make it for +5v where my capacitor calculatin getting wrong

http://electronics.stackexchange.co...ood-for-driving-an-array-of-smaller-solenoids

check above articles...

plz help me to resolve this problem

 

[FvM]

Why "getting wrong"? You'll end up in rather large capacitor values for a 16 ohm coil and 100 ms pulse duration, e.g. 10-15 mF (10000 µF). And there's no room for large driver voltage drops.

For the 5 ohm relay, a MOSFET H-bridge with monoflops seems more suitable.

 

[deepakchikane]

Why "getting wrong"? You'll end up in rather large capacitor values for a 16 ohm coil and 100 ms pulse duration, e.g. 10-15 mF (10000 µF). And there's no room for large driver voltage drops.

For the 5 ohm relay, a MOSFET H-bridge with monoflops seems more suitable.

fvm
the 10000uf cap will take more space also cost...

i dont have 5 ohm relay....

 

[BradtheRad]

3.5 to 5 V through a 16 ohm coil, suggests you must apply a pulse of current on the order of a quarter of an ampere. That is why the capacitor will need to be a large value.

Your relay is a latching relay. Have you considered using a plain relay, or semiconductor switches, or solid-state relays, etc.?

There are ordinary 5V relays which need less current to activate the coil.

 

[FvM]

i dont have 5 ohm relay....

Sorry, meaned 5V.

There are ordinary 5V relays which need less current to activate the coil.

5V/16 ohm coil is rather normal for a 90 A power relay. But the really smart thing with latching relays is that the can be hold in on-state with no power consumption. That's why people spend the extra effort for a driver circuit.

I agree that the large capacitor needed for the simple driver circuit isn't very smart though, so you will reather choose the electronical variant with H-bridge.

 

[deepakchikane]

Sorry, meaned 5V.


5V/16 ohm coil is rather normal for a 90 A power relay. But the really smart thing with latching relays is that the can be hold in on-state with no power consumption. That's why people spend the extra effort for a driver circuit.

I agree that the large capacitor needed for the simple driver circuit isn't very smart though, so you will reather choose the electronical variant with H-bridge.

FVM: Really true... driver circuit is mucher crictical...