They'd find it MUCH more difficult to change the lawyer screen though! There's another program similar to MeMap called GpsWarn.
If you're interested in using it with an external antenna, you might be interested in a re-radiating antenna. It is more portable because it uses batteries instead of the car's cigarette lighter. I have no direct experience with this device, but others have posted praise for it in other threads. Neo-Geo, can you tell me how to change the info listed on the owners info screen on the blue etrex legend.
Courier New is a Windows font, so even if it had worked, it wouldn't have on Mac, Linux, phones, etc. You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. Paste as plain text instead. Only 75 emoji are allowed. I stumbled across the idea to use a piece of credit-card or any suitable plastic for hacked connector. You can see my version here. Just cut a piece of plastic to size so that it fits into connector slot just right.
Use a dremel tool or whatever you can find to cut a slit for 'key' and drill three or four if you want external power version small holes over the contact pads. Drill two larger holes further away from contacts inch or so so that you can pull your cable through them. If you tighten it up, the holes will lock the cable so that you will not pull the wires out from the small contact holes.
The cable should be 'multi-stranded' so that you can twist the protruding ends into small bundles that contact with to connector pads. The resulting construction is pretty reliable if you get the contact end precise enough. If not, just do another one. My friends created a better connector from PC power supply connector that coes to AT style motherboard.
It has a correct pin spacing, and after some creative cutting, filing, and bending of pins they were able to create a connector that stays in slot and is quite strong mechanically. This is how it looks:. There is a blob of hot glue on top that fixes both the wires and pins, as the pins are reversed and bent out of shape. Two ways - easy, cheap and hot or complicated, expensive and cool. First one is straightforward linear supply that you can probably construct from scavenged parts lying in your junkbox.
So you will need big fat components and lots of room to dump that heat. Building the thing into cigarette lighter plug is probably out of a question. Other than that, it will work just fine. As you can see, it is T adjustable voltage regulator configured for 3V output using R1 and R2. C2 is a small output capacitor, if you want to make it bigger than 25,0 uF you also need a reverse protection diode over regulator, so don't do that.
R3,D1,D2 and C1 form a protection circuitry for voltage regulator. D1 protects the whole thing against reverse voltage spikes, D2 protects against excessive positive spikes and load dumps both negative and positive spikes can reach voltages over 80V in your car! R3 has several jobs to do, first it drops some of the input voltage to ease the load on regulator chip D1 also drops about 1 volt. It also limits surge currents through D2, and limits short circuit current though the power supply to about mA.
D2 is TVS transient voltage suppression diode. These diodes act like zener diodes but can withstand huge currents in short bursts. Heavier artillery is generally recommended for vehicle power supplies, but as we only need about mA, we can use R3 to easy the life for TVS diode.
TVS diodes have two critical thresholds - breakdown voltage and clamping voltage. First indicates at which reverse voltage the current starts to flow through the TVS, and clamping voltage is a maximum that can appear across it if the voltage continues to rise. TVS either survives the further increase in voltage, or explodes if it can't take any more.
In car, you need to use one that has breakdown voltage over 14V, and clamping voltage below 40V which is maximum specified for voltage regulator. However, you will want to choose the one with clamping voltage nearest to 40V so that you will not try to eat all the garbage in car electrics alone. Have the other guy's TVS do the hard work for you.
D3 is power indicator led. Besides just looking cool, it gives some load to voltage regulator to keep its output voltage in control. These things have minimum specified loads at which they stay in regulation. Post a Comment. Subscribe to Books Tube. Ultimate Collection of Computer Books. Newer Post Older Post Home. Subscribe to: Post Comments Atom. Would you like to get my updates directly to your mailbox? Click below to Enter your mail address. Enter your email address:. Latest Pc Tips Loading Latest Book Updates Loading Read comments for this articles to find out the free download links for this books.
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