I'm trying to install a fire bell as our house doorbell and I had a question about the power being supplied versus what the bell device wants. Currently, I have a 16V transformer providing power for a traditional doorbell. The fire bell I purchased is a Wheelock MB-G10-24. It indicates that it is polarized for DC and that the input voltage is 24.

Is it safe to connect the bell to a 16V power supply if it is rated for 24V? I would be fine if the bell would draw less power, possibly making the bell a little quieter, but I don't want to have a fire risk if the bell is going to try to force 24V from a 16V transformer.

 

The 16v transformer will give you 22v+ when rectified so should work and they are often a volt or two over the 16v.
Probabally close to 24vdc.
Max.

 

Hello,

The minimum voltage for the bell is 16 Volts:



Bertus

 

The previous bell would have been AC, the new one is DC so you will need rectification!
MAX.

 

Wow! You guys are fast and awesome! I'll get everything wired up and see if I can upload a video of it in action. I might need to muffle it a little bit if it's too loud

 

rectification

Any good resources you can recommend for how to perform the rectification?

 

Forgot, use a electrolytic cap on the bridge output, this will give you the 24vdc.
Get a suitable bridge rectifier, Digikey etc, and a 40v electrolytic, 50 to 100μf.
Max.

https://www.electrical4u.com/diode-bridge-rectifier/
Place the rectifier on the DC out put, the transformer 16v to input of the bridge.

 

Forgot, use a electrolytic cap on the bridge output, this will give you the 24vdc.
Get a suitable bridge rectifier, Digikey etc, and a 40v electrolytic, 50 to 100μf.
Max.

https://www.electrical4u.com/diode-bridge-rectifier/
Place the rectifier on the DC out put, the transformer 16v to input of the bridge.

 

Thanks! It looks like this Digikey would work: KBPC5006-G (https://www.digikey.com/short/p2m3vq)

 

Hello,

The one you show is very heavy (50 Amps).
This one is more than enough (10 Amps) in the same housing.

https://www.digikey.com/products/en...158&quantity=&ColumnSort=0&page=1&pageSize=25

Bertus

 

Hello,

The one you show is very heavy (50 Amps).
This one is more than enough (10 Amps) in the same housing.

https://www.digikey.com/products/en/discrete-semiconductor-products/diodes-bridge-rectifiers/299?k=&pkeyword=&sv=0&pv2117=u200V&sf=1&FV=142c006c,ffe0012b,mu10A|2158&quantity=&ColumnSort=0&page=1&pageSize=25

Bertus

Perfect! I'll place an order for this model. Thank you!

 

The bell needs less than an amp. 4 pin DIP chip DB207 good for 2A and much smaller. https://www.amazon.com/10pcs-DB207-...ords=db207+ic&qid=1569442195&s=gateway&sr=8-8