Search found 2801 matches

by haklesup
Fri Feb 14, 2003 2:33 pm
Forum: General Discussion
Topic: Ultrasonic Bird Repellers????
Replies: 14
Views: 3014

Re: Ultrasonic Bird Repellers????

I don't think birds give a #a$%& for ultrasonic noise. Even if they do precieve it, they would likly get used to it after a while anyway.<p>Look at the problem from a behavioral point of view. Deprive them of the dogs food (the dog will get used to a new location - like inside a small doghouse) and ...
by haklesup
Tue Feb 11, 2003 5:23 pm
Forum: General Discussion
Topic: Ring Tones and Graphics
Replies: 5
Views: 998

Re: Ring Tones and Graphics

Dial 611 and ask the customer service rep from your cell phone company. I had a few questions about a different phone that were poorly explained in the manual and they were helpful
by haklesup
Wed Feb 05, 2003 12:47 pm
Forum: General Discussion
Topic: Voltage measurement of Zener Diodes???
Replies: 9
Views: 1365

Re: Voltage measurement of Zener Diodes???

Use sufficient current limiting to prevent damage to your diodes. Less than 1mA is usually safe. You can probably go much higher with most diodes but don't get carried away.
by haklesup
Tue Jan 28, 2003 2:55 pm
Forum: General Discussion
Topic: Wireless voice control
Replies: 3
Views: 1198

Re: Wireless voice control

Paul,<p>There are plenty of wireless microphones out there from toys to pro equipment. You should be able to feed the output of the reciever into the mic input on your soundcard instead of an amplifier. Add some speach recognition software (I saw some in the store and have had some bundled with soun...
by haklesup
Thu Jan 23, 2003 6:06 pm
Forum: General Discussion
Topic: PIR portable alarms
Replies: 5
Views: 1557

Re: PIR portable alarms

The easiest way, assuming you don't want to buy something different would be to replace or somehow parallel the beeper with a relay. You may need to boost the signal meant for the beeper with a transistor so you have enough current to pull in the relay. An FET solid state switch would probably also ...
by haklesup
Wed Jan 22, 2003 4:01 pm
Forum: General Discussion
Topic: crystal rating
Replies: 7
Views: 1159

Re: crystal rating

It can't be 16kHz since the lowest frequency crystal I see in catalogs is 1.0MHz or 1.544MHz and the highest is around 150MHz<p>If the P/N were to be interpreted as 1600kHz then that would make it 1.6MHz which dosen't seem to be a common value in these same catalogs. Most jump from 1.544 to 1.8432MH...
by haklesup
Fri Jan 17, 2003 11:10 am
Forum: General Discussion
Topic: Waves Converter
Replies: 38
Views: 5951

Re: Waves Converter

Michael, check the replies to your private messages by clicking on the "My Profile" link at the top of the Forum page.
by haklesup
Mon Jan 13, 2003 4:01 pm
Forum: General Discussion
Topic: heated bobbers
Replies: 7
Views: 1613

Re: heated bobbers

That may be a tough nut to crack. A fair amount of engineering is needed to match the heater, the battery and the operating conditions (cold and wet)and put in a package that meets the need. Problem is power density. Heating elements tend to draw large amounts of power while batteries are limited in...
by haklesup
Sun Jan 12, 2003 8:56 pm
Forum: General Discussion
Topic: Dropping voltage on "Christmas Lights..."
Replies: 9
Views: 1552

Re: Dropping voltage on "Christmas Lights..."

If you don't actually burn your finger on the resistor, its not too hot and you can't beat the simplicity of a resistor. What you do need to worry about is the heat discolering or warping the plastic or other materials in its vicinity. If you have some air space around the R when you are finished, i...
by haklesup
Sun Jan 12, 2003 8:38 pm
Forum: General Discussion
Topic: Garage door opener safety sensors
Replies: 13
Views: 2467

Re: Garage door opener safety sensors

Keymaker- good to see you're feeling better :p <p>Shorting the wires for the reciever might work but it may also want a load, experiment with a resistor or diode if a simple short dosen't work. Leave the transmitter leads open because all that is a voltage source for the light (beam)<p>The oldest op...
by haklesup
Sun Jan 12, 2003 11:11 am
Forum: General Discussion
Topic: Poptronics Is Gone???
Replies: 48
Views: 13892

Re: Poptronics Is Gone???

Neil- You're preaching to the choir here.<p>Have you ever noticed how long your stuff lasts and how soon those "operators" break theirs and ask you to fix it.<p>It's not just Poptronics. Many magazines have gone out of print last year. I think it's partly the internet stealing readership but it is a...
by haklesup
Sun Jan 12, 2003 10:36 am
Forum: General Discussion
Topic: Dropping voltage on "Christmas Lights..."
Replies: 9
Views: 1552

Re: Dropping voltage on "Christmas Lights..."

Purely resistive voltage dropping will create a fair amount of heat considering the amount of voltage you are trying to "waste" as heat. <p>As an alternative to resistors you could wire 2 or 3 bulbs in series or drop the excess voltage using a zener diode and resistor combination or any combination ...
by haklesup
Thu Jan 09, 2003 7:54 pm
Forum: General Discussion
Topic: Power supplies
Replies: 9
Views: 1541

Re: Power supplies

If you do use a PC power supply, read the output specs (sticker on side) carefully. Note that very often the 5V and/or 12V supplies do not guarantee regulation until a minimum current load is applied. In other words, it may not be 5V under no load or small load conditions.<p>AT supplies are easier t...
by haklesup
Wed Jan 08, 2003 7:37 pm
Forum: General Discussion
Topic: Big Screen TV Splitter
Replies: 3
Views: 873

Re: Big Screen TV Splitter

I haven't seen anything exactly like that. You may want to try your question in the Ausio Visual Forum www.avsforum.com there are some hard core couch potatos there who may be able to help you.<p>If your bigscreen TV can take input from a PC you may have other options. A couple of USB video capture ...
by haklesup
Sat Jan 04, 2003 10:05 pm
Forum: General Discussion
Topic: Garage door opener safety sensors
Replies: 13
Views: 2467

Re: Garage door opener safety sensors

The transmitter is a lamp of some sort. It may be infrared or it may be plain white light and a lens. The reciever is a photosensor sensitive to the light from the transmitter. The TX is simply aimed at the RCVR or the door won't work. If the beam is broken, the logic circuit turns off the motor and...