Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
The fully charged set of batteries lasted a full 14 days, I refreshed them on Friday Feb. 17.
pinball2k
Member
Last Activity: 02-19-2017, 12:26 PM
Joined: 01-23-2017
Location: San Francisco
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
FYI
The batteries lasted 8 days. Not terrible because I got two sets and two chargers for the price. So I charge up the other pair while one pair takes a week to discharge.
I am waiting for my regulator boards to see if I can get the receiver working without the batteries.Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
So far, this works just fine. Thank you srhofmann for the suggestion.
Here is what I did.
1. Purchased 4pcs 18650 3.7V 9900mAh Rechargeable Li-ion Battery +2 Charger Set High Capacity. From Ebay for $12.69 including shipping.
2. Modified one of the 2 chargers to be a battery holder.
3. Soldered a proper barrel connecter and short lead into the "battery holder".
This is working just fine. Let's see how long the batteries last....Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
I will try this, you may be right....Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
I have several choices including 24V 6a power supply.Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
Here is a link to Ebay where I purchased them.
[url]http://www.ebay.com/itm/20W-DC-DC-4-5-24V-to-0-9V-20V-Red-Step-Down-Converter-Regulator-LED-volt-meter-/222087854477?hash=item33b577b98d:g:n8MAAOSwopRYeZR5[/url]
Also see phot attached.Re: Need 4.5 Volt 4 Amp Power Supply...opRYeZR5[/url]...Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
Here is why I'm pursuing a 4.5 volt 4 amp supply.
1. I am talking about the receiver only.
2. The receiver uses 3 C cells for 4.5 volts.
3. I first tried a 5 volt 2 amp supply and that did not work; meaning the signal led in the receiver flashed with motion on the PIR but no chime.
4. I them tried a 5 volt 3 amp supply I had around and that worked intermittently; meaning the the signal led in the receiver flashed with motion on the PIR but the chime worked about 2 times out of 10.
5. Yes, the device works...Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
Yes, I know it seems strange but C cells are rated at 8000 mah so that makes it look ok. I looked for some 18650 and I will try these also.
I'm still would like comments on my drawing I attached. Will it work, in theory?...Leave a comment:
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Re: Need 4.5 Volt 4 Amp Power Supply, Cheap
See attached....Leave a comment:
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Need 4.5 Volt 4 Amp Power Supply, Cheap
I have a motion detector that uses 3 C cells for the receiver and chime. It has a plug that is labeled 4.5 V. I tried a 5 Volt 3 Amp power supply with no success. The receiver works and the LED lights up in response to movement near the motion detector but no chime. I did some rewiring (thicker gauge wires) and can get the chime to ring SOMETIMES. I think the receiver chime draws more amps than I am providing with the power supply I have.
I found some nice boards that will provide regulated 4.5 volts but are only rated at 2 amps. I have a 6 amp 12 volt supply and was thinking of... -
Re: New Members - please post your introductions here
Hi, my real name is Fred and I am a senior citizen with a little bit of electronics knowledge; at least enough to calculate V= I*R. I have several questions I'd like to ask once I'm allowed to.
I started home computing in 1969 with a Litton Monroe-bot 10. It used a teletype with a paper tape punch and reader and had 2K of memory. I learned to program it with the manual and could actually do election data summarizations. Now things are 10,000 times easier and just as much fun.Leave a comment:
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