Voltage Detector

See More About:    Lcd Dc Volt        Multimeter Leads        Connector Crimp        

Our website Electric City is authorized by eBay to help you find the Voltage Detector you are searching for and present them to you. If you don"t immediately see the Voltage Detector you are shopping for below, be sure to take advantage of the advance search feature above and enter the specific product you want.

**Please Enable JavaScript to Navigate Thru Our Listings**
**Click Here for Instructions**

10 Pack LED Display USB Detector Voltage Current Tester Power Volt Amp Meter
10 Pack LED Display USB Detector Voltage Current Tester Power Volt Amp Meter
$56.90
quality
3 Tinker  Rasor AP W High Voltage Holiday Detector Tester
3 Tinker Rasor AP W High Voltage Holiday Detector Tester
$950.00
quality
SALISBURY AUDIO VISUAL VOLTAGE DETECTOR 4544 Q21
SALISBURY AUDIO VISUAL VOLTAGE DETECTOR 4544 Q21
$172.94
quality
S139224 HD Electric Co TAG330 Direct Contact Audible Visual Voltage Detector
S139224 HD Electric Co TAG330 Direct Contact Audible Visual Voltage Detector
$100.00
quality
EXTECH MA120 AC DC Mini Clamp Meter Voltage Detector
EXTECH MA120 AC DC Mini Clamp Meter Voltage Detector
$84.99
quality
salisbury 4244 audio visual voltage detector b
salisbury 4244 audio visual voltage detector b
$169.99
quality
salisbury 4244 audio visual voltage detector c
salisbury 4244 audio visual voltage detector c
$169.99
quality
ROSEWILL 3 IN 1 DETECTOR STUD METAL VOLTAGE WITH LCD DISPLAY MODEL REGD 6361 NIP
ROSEWILL 3 IN 1 DETECTOR STUD METAL VOLTAGE WITH LCD DISPLAY MODEL REGD 6361 NIP
$29.99
quality
BVM HIGH VOLTAGE DETECTOR CTC CERTIFIED 7882003
BVM HIGH VOLTAGE DETECTOR CTC CERTIFIED 7882003
$149.00
quality
Eclipse ProsKit NT 6352 3 in 1 Metal Voltage Stud Detector 701x472x137
Eclipse ProsKit NT 6352 3 in 1 Metal Voltage Stud Detector 701x472x137
$33.99
quality
3 in1 Electro Brand Studs Metal Voltage Detector Model SMV 9809W
3 in1 Electro Brand Studs Metal Voltage Detector Model SMV 9809W
$9.99
quality
Craftsman Dual Range AC Voltage Detector with Flashlight Free Shipping New
Craftsman Dual Range AC Voltage Detector with Flashlight Free Shipping New
$26.06
quality
Tinker  Rasor Holiday Model AP W 800V 35000V High Voltage Detector Travel Case
Tinker Rasor Holiday Model AP W 800V 35000V High Voltage Detector Travel Case
$2,700.00
quality
RF SERVICES MODEL  9900 0015 03 VOLTAGE DETECTOR  CONVERTER ITEM  1181 7
RF SERVICES MODEL 9900 0015 03 VOLTAGE DETECTOR CONVERTER ITEM 1181 7
$42.00
quality
Fluke non contact voltage detector 10963 01 E
Fluke non contact voltage detector 10963 01 E
$34.00
quality
AEMC 213112 275HVD Non Contact High Voltage Detector
AEMC 213112 275HVD Non Contact High Voltage Detector
$334.10
quality
New Fluke 2AC VoltAlert Voltage Detector Tester Meter USA Seller
New Fluke 2AC VoltAlert Voltage Detector Tester Meter USA Seller
$27.68
quality
New Fluke 2AC VoltAlert Voltage Detector Tester Meter AC 90V 1000V
New Fluke 2AC VoltAlert Voltage Detector Tester Meter AC 90V 1000V
$27.69
quality
Balzers HLT 160 Helium Leak Detector ACPI HIgh Voltage
Balzers HLT 160 Helium Leak Detector ACPI HIgh Voltage
$51.99
quality
Besantek BST HVD08 Personal Safety Voltage Detector
Besantek BST HVD08 Personal Safety Voltage Detector
$104.54
quality
BIERER AVMETER 73293 AUDIBLE VISUAL VOLTAGE DETECTOR 0 500KV
BIERER AVMETER 73293 AUDIBLE VISUAL VOLTAGE DETECTOR 0 500KV
$699.99
quality
PCWI Compact 15 High Voltage Porosity Holiday Detector Bad Battery
PCWI Compact 15 High Voltage Porosity Holiday Detector Bad Battery
$719.99
quality
SALISBURY 4444 High Voltage Detector Visual  Audible Light Signal SALISBURY
SALISBURY 4444 High Voltage Detector Visual Audible Light Signal SALISBURY
$195.00
quality
New Fluke 2AC VoltAlert Voltage Detector Tester Meter
New Fluke 2AC VoltAlert Voltage Detector Tester Meter
$29.99
quality
Dual Range AC Voltage Detector with Flashlight Craftsman
Dual Range AC Voltage Detector with Flashlight Craftsman
$31.47
quality
Milwaukee Non Contact AC Voltage Detector Electrical Tester Handy Volt Stick Pen
Milwaukee Non Contact AC Voltage Detector Electrical Tester Handy Volt Stick Pen
$23.25
quality
CLANTECH INC PV800  PV1100 High Voltage Detector
CLANTECH INC PV800 PV1100 High Voltage Detector
$17.99
quality
Reliance Controls Volt Snooper Voltage Detector
Reliance Controls Volt Snooper Voltage Detector
$15.19
quality
Amprobe CC 300PRO Case for TIC 300 PRO High Voltage Detector
Amprobe CC 300PRO Case for TIC 300 PRO High Voltage Detector
$63.17
quality
Amprobe TIC 300 PRO High Voltage Detector
Amprobe TIC 300 PRO High Voltage Detector
$283.07
quality
RockyMars UT11B Non Contact Voltage Pen AC Detector UT13B
RockyMars UT11B Non Contact Voltage Pen AC Detector UT13B
$22.82
quality
Vestec Detector Voltage Delay Timer PN 25 48
Vestec Detector Voltage Delay Timer PN 25 48
$199.90
quality
2202 20 Milwaukee Voltage Detector W Led Light
2202 20 Milwaukee Voltage Detector W Led Light
$18.73
quality
SALISBURY 4244 High Voltage Detector Visual  Audible Light Signal
SALISBURY 4244 High Voltage Detector Visual Audible Light Signal
$250.00
quality
Time Mark 108A Line Voltage  Phase Sequence Detector 90 480 VAC 3 MINT
Time Mark 108A Line Voltage Phase Sequence Detector 90 480 VAC 3 MINT
$79.99
quality
Extech DV24 AC Voltage Detector Flashlight
Extech DV24 AC Voltage Detector Flashlight
$9.35
quality
Mitchell 213112 Non Contact High Voltage NCV Detector
Mitchell 213112 Non Contact High Voltage NCV Detector
$279.95
quality
salisbury 4244 audio visual voltage detector a
salisbury 4244 audio visual voltage detector a
$169.99
quality
salisbury 4244 audio visual voltage detector D
salisbury 4244 audio visual voltage detector D
$149.99
quality
Besantek BST HVD2 High Voltage Detector 6 kV to 815 kV
Besantek BST HVD2 High Voltage Detector 6 kV to 815 kV
$373.14
quality
Besantek BST HVD21 Non Contact High Voltage Detector
Besantek BST HVD21 Non Contact High Voltage Detector
$305.99
quality
Besantek BST HVD5 High Voltage Detector 11 kV to 36 kV
Besantek BST HVD5 High Voltage Detector 11 kV to 36 kV
$458.99
quality
Besantek BST HVD07 Personal Safety Voltage Detector AC Voltage Warnin
Besantek BST HVD07 Personal Safety Voltage Detector AC Voltage Warnin
$181.89
quality
Hill Research VD2 High Voltage Detector Used
Hill Research VD2 High Voltage Detector Used
$378.95
quality
clantech pv1100 pv800 high voltage detector for unshielded conductor
clantech pv1100 pv800 high voltage detector for unshielded conductor
$269.99
quality
ProsKit NT 6352 3 in 1 Metal Voltage Stud Detector 701 x 472 x 137 Size
ProsKit NT 6352 3 in 1 Metal Voltage Stud Detector 701 x 472 x 137 Size
$30.00
quality
Biddle Detex Electronic Voltage Detector 514360 4 New
Biddle Detex Electronic Voltage Detector 514360 4 New
$250.00
quality
HI LINE Overhead Line Voltage Detector 240V to 230KV
HI LINE Overhead Line Voltage Detector 240V to 230KV
$350.00
quality
HI LINE Overhead Line Voltage Detector 240V to 69KV  URD 15 25 35KV
HI LINE Overhead Line Voltage Detector 240V to 69KV URD 15 25 35KV
$275.00
quality
UNI T AC Electric Voltage Tester Power Detector Sensor Non Contact Pen 90 1000V
UNI T AC Electric Voltage Tester Power Detector Sensor Non Contact Pen 90 1000V
$11.83
quality
UNI T Non Contact AC Voltage Detector Electrical Tester Stick Pen LED 90 1000V
UNI T Non Contact AC Voltage Detector Electrical Tester Stick Pen LED 90 1000V
$11.79
quality
DC voltage standard Differential voltmeter Null detector Fluke 335D
DC voltage standard Differential voltmeter Null detector Fluke 335D
$750.00
quality
Voltage Detector
Voltage Detector
$21.99
quality
NEW AC Non Contact Electric Voltage Detector Tester Test Pen 90 1000V LCD OEO
NEW AC Non Contact Electric Voltage Detector Tester Test Pen 90 1000V LCD OEO
$5.95
quality
Didn"t find what your looking for? Search our real time inventory below...

Voltage Detector

Voltage+Detector

Frequently Asked Questions...

Where can I find schematics an instructions for small BEAM style robots?


Best Answer...

Answer:

APPETIZER SOLAR ROBOT

This miniature robot was derived from the instructions provided on Chiu-Yuan Fang's website. Some alterations are made based on the parts available. There are two major style changes. Firstly, this robot drags the capacitor rather than pushing it. Secondly, this robot carries its solar panel in front of it, like an appetizer tray.
Click the above picture to see a video of Appetizer walking (or popping) in the early afternoon Colorado sun at 9,000 feet high. The video hasn't been sped up; this is the actual pace.

The schematic is on :

http://www.robotroom.com/Appetizer.html

Are there problems with the above circuit?
I posted these questions on this page without thinking about who might read it. Turns out that Dave Hrynkiw himself read the following questions and kindly provided his thoughts and answers. Thanks Dave!

#1 Since they are acting like switches, transistors Q1N and Q2N appropriately don't have loads connected to their respective emitters. But then shouldn't they have current-limiting resistors (like 1 kilohm) connected to their bases? It would seem current is being wasted.

Dave responds: You know, that's a good point, and I don't think I've ever tried that. Just by looking at it, I think the issue may be suspending the 3906 collector too high above ground for it to remain on.

It would also seem that there's a voltage drop problem from power (2.5 V) through Q1P (-0.6 V) through Q1N (-0.6 V) to ground (0 V). Where'd the other 1.3 V go? Using a 1 kilohm resistor at Q1's base would source the voltage drop.

Dave responds: That's controlled by the 3906's base current (R1). Again, a resistor on the pnp collector may suspend the 3906 too high above ground to be effective. Good idea tho - worth a try.

#2 Why use bipolar-junction transistors? In a current-poor environment (solar power), why not use MOSFETs?

Dave responds: Bipolar transistors are used because they are very inexpensive, and most FETs run better at high voltages. We have some Zetex ZVN2106's that work very well, but cost almost 10X more than a bipolar.

#3 Are the photodiode symbols in backwards? What about the solar-cell symbol? I thought I read somewhere that the arrow for these kinds of devices is reversed from regular diodes.

Dave responds: The photodiodes are in "backwards". When reverse-biased, they respond *very* quickly to changes in light intensity, leaking current proportional to the light. In forward-biased mode (as you show), they actually use the photoelectric effect to generate power (ie: 0.5V solarcell), which actually tricks the 1381 into triggering prematurely, as you're generating a voltage, which adds to the system voltage. Both techniques work in this circuit.

The solar-cell symbol should be like a battery stack, with arrows going into it.

These issues occurred to me after finishing Appetizer, which is free-form soldered. Therefore, I haven't tried testing these ideas to see if a problem exists nor if my suggested corrective measures work.

Power:

The solar panel (D3) stores power in a capacitor (C3). The voltage in the capacitor increases as the capacitor fills up. Either the left (U1) or right (U2) voltage-detector trips when there's a large enough voltage available, in this case between 2 and 2.5 volts.

Movement:

When the left voltage-detector trips, a transistor (Q1N) is turned on. This allows current to flow through the left motor (M1), which causes the robot to move forward by spinning to the right.

Almost immediately, the power remaining in the capacitor (C3) drops below the voltage-detector (U1) trip point. Another transistor (Q1P) keeps the remaining current flowing through the motor, so that the motor actually gets enough current to result in movement.

A resistor (R1) determines the lowest shut-off voltage. The lower the resistance, the lower the voltage delivered to the motor before shutting off. If the voltage is below the amount needed to cause the motor to turn, the remaining current is just wasted (turned into heat instead of motion) below that voltage point.

The right motor moves using almost the same circuit design as the left motor. However, the left motor is connected backwards (reverse-polarity) since the left motor must spin the opposite direction in order to move the robot in the opposite direction.

Direction:

To steer, the amount of light to the left and the right of the robot affects the amount of voltage dropped through two photodiodes (D1 and D2). Only one of the photodiodes usually permits their associated voltage detector to trip, resulting in a left turn, right turn, or side-to-side forward stagger.

A potentiometer (R3) balances voltage-drop between the photodiodes to correct minor differences in motor efficiency, weight loading, circuit resistance, and so on. After repeated manual fine-tuning of the potentiometer, the robot can generally proceed directly toward a light source, rather than veering off.

Food Hunting:

Solar-powered robots are photovores (Greek for "light-eaters"), which necessitates a light-seeking technique.

The light sensor on the right side (D1) of the robot trips the motor on the left side (M1), and vice-versa. This is needed for brightness on the left side to cause the robot to move left, because activation of the right motor moves the robot forward and to the left.

Implementation:

Parts:

Nearly all the parts were purchased from Solarbotics.

Glue Gun:

Every part of the robot connects by solder. The only exception is the motors, which are connected to the robot's body by glue from a hot-glue gun. The glue is lightweight, slightly flexible, and strong; maybe too strong.

After connecting the plastic back portion of the motors to the plastic casing of the potentiometer, I'm unable to remove the motors without possibly ripping off their backs. It's too bad, because the robot would perform better if the motors were angled more perpendicular to the ground (greater forward motion) and farther back (to place the center of gravity directly over the motors).
Tubing:

Tubing covers the leads of most of the components. It isn't necessary to actually shrink the tubing, just slip it over the leads. The tubes protect against shorts, allow for tighter packing, decorate, and color-code connections (ground, positive voltage, or signal).

Additionally, tubing on the shafts of the motors (instead of wheels) provides traction. I tried using tiny LEGO wheels as well as homemade glue-gun glue cross sections as wheels. In both cases, even the larger pager motors failed to turn when wheels were attached.

Cell-Phone Motor Torque:

I tried using the cell-phone vibrating motors. Unfortunately, the robot didn't move at all! The cell-phone motors simply don't have enough torque.

Lifting the robot off the ground caused the motors to spin appropriately and showed that the motors were working. Adding a lithium cell for a steady 3 volts (rather than 1.2 to 2.5 volts) didn't help. (Lithium cells don't provide high current). Adding a 3-volt power line (for plenty of available current) allowed the robot to continue moving, but didn't allow it to start moving from a still state.

I suppose the only option is to gear down those kinds of motors. But solar power doesn't provide much total current per blast, so it may not be enough to move an entire tooth before it stalls.

The Future:

Although the robot works well in sunlight, it's pathetic with indoor lighting. I'd like to design a solar engine that would pump-up small voltages, perhaps from a group of smaller capacitors and into a large storage capacitor.

To reduce weight and size, soldering together surface-mounted components might produce a really peppy B.E.A.M. robot.

Even with touch sensors and greater spunk, I'm not sure the behavior will ever be as exciting as a microcontroller-based robot.

BEAM robots are fast and easy to create. They're a good way for newcomers to get started in robotics.

Appetizer was a lot of fun to build!


If you are looking for a different item here"s a list of related products on Electric City, please check out the following:

See More About:    Led Warm        Design Within Reach        Pole 120        

Other Items People View After These Listings About