Thread Tools
Sep 30, 2012, 11:29 AM
Registered User
Discussion

Hacking a Hobby King volt $3.00 volt meter to read 0-30 volts


Hobby King has a cheap (Less than $3.00) volt meter designed to be installed in RC cars, planes etc to monitor the battery voltage.
Hobby King Volt Meter The range on these meters is 3.2 to 30 Volts DC

They are very popular with the RC crowd and are out of stock all the time. They ship from Hong Kong and take 2-3 weeks to receive. If you order 10 of them shipping is only $2.99 so they are not a bad deal.

I wanted to add these to some small adjustable power supplies that I have that do not have a volt meter built in. But I wanted to read voltages lower than 3.2 volts. The 3.2 volt limit is due to the 7130-1 3 volt low drop out voltage regulator. So I started looking at ways to power this from a source other than the voltage source that is being measured by the meter. I cut the trace of the inout to the 7130-1 voltage regulator and in this example I powered it from a 9 volt battery. When this is installed in my adjustable power supply I will power it from the 5 volt fixed voltage in the supply.


All the details are on my web page at http://wentztech.com/radio/Projects/...VoltMeter.html

Dale
Sign up now
to remove ads between posts
Oct 22, 2012, 06:47 PM
Gone Multicoptering
bwww's Avatar
Cool. Well done.
Dec 20, 2012, 05:56 AM
Registered User
flyboy1001e's Avatar

Voltage Checker hack


Thanks for the hack

Mike

ps: $1.73 http://www.himodel.com/electric/HiMo...Connector.html
Dec 20, 2012, 10:07 AM
Marion
Thanks :-)
Dec 21, 2012, 01:04 AM
Registered Adict
tignmeg's Avatar
I submitted it to HK's PriceWar facility. (At the bottom of every product page)
You should see it cheaper within 48 hrs
Dec 21, 2012, 11:29 AM
Registered User
flyboy1001e's Avatar
Thanks

Never saw the price war before.

Mike
Dec 22, 2012, 05:09 AM
Registered Adict
tignmeg's Avatar
$1.69 Now.
http://www.hobbyking.com/hobbyking/s...dproduct=18825

Gotta love that Price War facility

I was about to buy a few more of them so its perfect timing.

I put these in pretty much all my models cos they weigh stuff all and give me a quick 'fuel gauge'. They can be mounted so that they are visible from the outside.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
For Sale Hobbico digital volt meter 15.00 shipped greatplanes Aircraft - General - Miscellaneous (FS/W) 0 Aug 05, 2012 03:38 PM
Mini-Review Skyclimber 2 meter sailplane from Hobby King zen@lanset.com Electric Sailplanes 19 Jun 22, 2012 11:37 PM
For Sale Tenergy Watt/volt/lipo balance meter $30.00 shipped mtdoramike Aircraft - Electric - Power Systems (FS/W) 0 May 20, 2011 07:36 AM
For Sale RC LIPO VOLT METER 3-6 S $15.00 shipped java8297 Aircraft - Electric - Batteries & Chargers (FS/W) 13 Jan 15, 2009 12:20 AM
Sold $110.00 TP 4200mah 3-cell ,, 11.1 volt Lipo battery for sale!!! NEW !!T-rex !! $110.0 charlieb Aircraft - Electric - Batteries & Chargers (FS/W) 2 Jul 13, 2006 02:22 PM