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Turns out, several people did. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. After reseating the board in the box and making lp8011b the battery wires don’t pass under any component legs it hasn’t happened again.

LPB Datasheet, LPB PDF, Pinouts, Circuit – Unspecified

At this point I tested my board and while tuning the variable cap it suddenly became dark in the room: Of course since I’m lp8011b the remote to cut the lights when I go to bed I’m basically using the remote from two places which brings with it the unavoidable annoyance of the remote being in the wrong place all the time. Which means I have to get up and look for it which is effectively as much of an annoyance as it was meant to solve.

It is a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc.

Working on the AC outlet requires far more care and safety. You can control lights, fans, AC system, computer, printer, amplifier, robots, garage door, security systems, motor-driven curtains, motorized window blinds, door locks, sprinklers, motorized projection screens and anything else you can think of. Instead, he breadboarded a small circuit around the PIC12F microcontroller to take care of the data and address control.

He’s basically lp80b1 the datasheet units by 4 in case anyone actually looks into this The decoders may not care as It seems to have worked for him. Note below on the jumper blocks: The relay control from the decoder was routed via the microcontroller.

So I wanted a second controller that would basically be a stationary switch by my bed so I could leave the portable remote around the desk.

Working on it when it is powered up requires extreme caution. It can be connected to any type of stereo audio source such as iPod, Computer, Laptop, CD Player, Walkman, Television, Satellite Receiver, Tape Deck or other stereo system to transmit stereo sound with excellent clarity throughout your home, office, yard or camp ground. I think that code has op801b bug though as the logic low component of the syncbit should be 31 times the short-pulse duration according to the datasheet not 7.


Arduino Prototype uses all standard through-hole components for easy construction, two of which are hidden underneath IC socket. Has a few address and data pins and generates a signal on lp80b1 output pin based on the configuration of those at the time the enable pin is connected to ground.

Some component leg that I forgot to cut probably a resistor must have punctured the battery wire though as it drained to 10v by lp8801b night and since the circuit is basically open when none of the buttons are pressed that shouldn’t happen at all. After some wasted time I caved and connected the original remote’s encoder chip data output pin to the microphone input of my netbook. Headphone amplifier is small enough to fit in Altoids tin box, and thanks to low power consumption may be supplied from a single 9V battery.

The output waveforms can be both amplitude and frequency modulated. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. At least 1 5. The board runs off a 23A 12 volt stack battery. It is an irreplaceable tool for troubleshooting and repairing electronic equipment by determining performance and health of electrolytic capacitors.

It took several modifications to my original board to get it working with the attiny.

Besides, he wanted to be able to manually switch the AC outlet. It also analyzes transistor’s characteristics such as voltage and gain.

(PDF) LP801B Datasheet download

At first I didn’t think much of it and ordered some PTs and made a PCB which is basically a clone of the original remote adapted for components I had lying around or just stupidly large pads where I had no idea what I was going to use when I made the board Not being patient enough however I started looking around to see if anyone’s emulated this chip on a microcontroller before. Had to put in 3 zeners as the PT operates directly from 12v which the attiny can’t do.

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The only light switch is across the room from my PC and it’s a pretty large room. Since the various brands in use have a slightly different logic, it needed some rework to make them compatible. I did find a puncture mark on the positive lead so that must have been it. Running from lower voltages may be possible but the RF circuit definitely needs to be retuned. The transmit remote was a quick fix — changing the DIP switch selected address bits from being pulled low to high and swapping the On and Off buttons to make it compatible with the other outlets.

His initial tests showed that the AC outlet and its remote could be revived, so he set about exploring its guts.

Then with the cool Soundcard Oscilloscope to which I could adapt my pulse duration. When I got mine to work I was using the datasheet-correct count so I didn’t test with that. It took a few more iterations to get the delay “just right” but l8p01b it works perfectly.

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It’s small, power efficient, yet customizable through onboard 2 x 7 perfboard that can be used for connecting various sensors and connectors. The circuit includes an auto ranging as well as reset switch and produces very accurate and stable readings. If I knew in advance that I’d be able to do this I would’ve designed a much smaller board.

So I took the code at http: The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. I was trying random numbers for the pulse duration and randomly tuning the white variable capacitor but with none of the parameters actually being correct this method was never going to work.

I put it in a small electrical box with 2 push-buttons and installed it in an easy to reach l;801b from the bed.

These remote AC outlets consist of an encoder chip on the remote and a corresponding decoder chip on the outlet, working at MHz. I popped the original remote open to see what I was dealing with. The building’s basically a 1-room apartment so this works out great with the remote. This is a remote controllable light switch that comes with an RF remote.