Search found 26 matches

by VARISTORS
Mon Sep 27, 2010 9:48 pm
Forum: General Discussion
Topic: 6V car flasher
Replies: 3
Views: 899

6V car flasher

My car has a 6V system. The regulator is set at 6.6V The signal lite flasher operates spoatically at 7V and properly at 8V. Need a circuit fed by 6V to generate 8V. Jack
by VARISTORS
Tue Nov 24, 2009 5:38 pm
Forum: General Discussion
Topic: AC motor capacitor
Replies: 4
Views: 1161

Re: AC motor capacitor

Thanks, tried both methods. Obtained o.1 A, and 19.3 V all AC calculated to 13.74 micro farads not the desired 100 or so microfarads needed. Jack,
by VARISTORS
Sun Nov 22, 2009 4:01 pm
Forum: General Discussion
Topic: AC motor capacitor
Replies: 4
Views: 1161

AC motor capacitor

How does one test a 105-126 MFD 110 V AC 60 Hz cap? Its off a very old drill press motor.
by VARISTORS
Mon Jul 06, 2009 9:31 pm
Forum: General Discussion
Topic: Vehicle Detector
Replies: 3
Views: 914

Vehicle Detector

Vehicle detectors: Placed a 5' diam. coil (5 loops) 4-6" under pavement on front road. Object to have the
50 km/hr (31 mph) traffic turn the lights on a xmas tree. Need advice on what to look for in a vehicle
detector and what to avoid.
by VARISTORS
Tue May 20, 2008 8:14 pm
Forum: General Discussion
Topic: 7 day timer
Replies: 2
Views: 1109

7 day timer

Would appreciate receiving a schematic for a 7 day OFF, 5 min. ON, recycling timer. 120 V input 120 V output.
by VARISTORS
Fri Mar 14, 2008 6:26 pm
Forum: Up For Grabs
Topic: 3K resistors
Replies: 0
Views: 2016

3K resistors

Need fifteen 3K ,1% ,0.5W resistors. Happy to accommodate the kind person as requested. :grin:
by VARISTORS
Thu Feb 21, 2008 6:01 pm
Forum: General Discussion
Topic: Instant Motor Stop
Replies: 12
Views: 3885

reason for ac motor stop

The objective is to cut down on lost time waiting for the blade to stop. They are both inductive motors (3/4 and 1 HP). What size should the diodes be? What is the time issue with the winding heating up? Does putting a 30 ohm wire wound resistor in series with the diode; limiting the current to 8 A ...
by VARISTORS
Sat Feb 16, 2008 9:04 pm
Forum: General Discussion
Topic: Instant Motor Stop
Replies: 12
Views: 3885

Instant Motor Stop

A shot of DC into an AC motor will instantly stop the motor. Plan is to open one of the 240 V Ac lines and insert a NC, Sw in parallel with a diode. Opening the SW will send the DC shot to the motor; the regular motor SW is shut off at the same time. What should the PIV and A ratings of the two diod...
by VARISTORS
Mon Oct 15, 2007 11:06 pm
Forum: General Discussion
Topic: Vehicle Detector II
Replies: 4
Views: 1656

Vehicle Detector II

A coil can be layed only parallel to the road. ( An old road shoulder has
been cut away and is about to be replaced.) 14 ga solid Cu wrapped
around a 3/4" length of PVC pipe comes to mind. How many turns?
Length of PVC ? Suggestions? Help?[/b]
by VARISTORS
Fri Sep 28, 2007 9:53 pm
Forum: General Discussion
Topic: Vehicle Detector
Replies: 9
Views: 2488

Vehicle Detector

The city graciously cut a six foot swath across the road removing the pavement to install a pipe perfectly positioned for a coil to be placed -- what luck! A miniture spoting scope sitting on a dusty shelf plus having contacted Edmund Optics will easily handle the other direction. THANKS! gentlemen,...
by VARISTORS
Thu Sep 27, 2007 9:17 pm
Forum: General Discussion
Topic: Vehicle Detector
Replies: 9
Views: 2488

Vehicle Detector

Needs to detect moving vehicles at night at a distance of 200 feet. Outputs to a 555 Schmitt trigger. (Houskhold motion detector shy of 200 feet. LDR/photodiodes worked until the town put in street lights - the farmer put in a flood light and the snow arrived.) Just the detector is needed. (Ultimate...
by VARISTORS
Tue Aug 22, 2006 8:33 pm
Forum: General Discussion
Topic: hammock rocker
Replies: 0
Views: 1039

hammock rocker

Looking for ideas (schematic) on how to build an automatic , hands free, hammock rocker.The hammock is suspended between two trees - so a rocking chair with a hammock for a seat is a no and the kits (a stake and some rope are a no. Perhaps a rope attached to an eccentric wheel run by a motor -or -a ...
by VARISTORS
Wed May 24, 2006 9:22 pm
Forum: General Discussion
Topic: starter motor current
Replies: 5
Views: 2052

starter motor current

How does one determine the current drawn by a starting motor? No data
plate or name on the motor.
by VARISTORS
Thu Jan 05, 2006 12:16 am
Forum: General Discussion
Topic: paralleling a tractor solenoid
Replies: 7
Views: 2762

Re: paralleling a tractor solenoid

The second sentence should read Assuming the bendix is being engaged but solenoid contacts are fried.;
The the solenoid is sealled so I can't get at the contacts.
The starter motor brushes are a good length.
by VARISTORS
Wed Jan 04, 2006 11:57 pm
Forum: General Discussion
Topic: paralleling a tractor solenoid
Replies: 7
Views: 2762

paralleling a tractor solenoid

Solenoid (John Deer 175 lawn & garden tractor) clicks & sounds like bendix is engaging flywheel but starter motor won't turn (except on hot days or occassionally if the key is turned on & off several times) Assuming the bendix is being engaged but the starter motor contacts are fried; would parallel...