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Lp8801b 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.
The output waveforms can be both amplitude and frequency modulated. This is a remote controllable light switch that comes with an RF remote.
It’s small, power efficient, yet customizable through onboard 2 x 7 perfboard that can be used for connecting various sensors and connectors. 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.
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. Has a few address and data pins and generates a signal on the output pin based on the configuration of those at the time the enable pin is connected to ground.
(Datasheet) LPB pdf – Éî ÛÚ ÊÐ Áª µÂ ºÏ Î¢µç×ÓÐÏÞ ¹« Ë¾ TEL£º Encoder / Decoder (1-page)
Some component leg that I forgot to cut probably a resistor must have punctured the battery wire though as it drained to 10v by that night and since the circuit is basically open when none of the buttons are pressed that shouldn’t happen at all. It also analyzes transistor’s characteristics such as voltage and gain. Then with the cool Soundcard Oscilloscope to which I could adapt my pulse duration. 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.
I did find a puncture mark on the positive lead so that must have been it.
(PDF) LP801B Datasheet download
Turns out, several people did. At this point I tested my board and while tuning the variable cap it suddenly became dark in the room: When I got mine to work I was using the datasheet-correct count so I didn’t test with that.
The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. After reseating the board in the box and making sure the battery wires don’t pass under any component legs it hasn’t happened again. So I took the code at http: It took several modifications to my original board to get it working with the attiny. Running from lower voltages may be possible but the RF circuit definitely needs to datxsheet retuned.
Of course since I’m using the remote to cut the lights when I go to bed I’m basically using the remote dtaasheet two places which brings with it the unavoidable annoyance of the remote being in the wrong place all the time. At least 1 5. It is an irreplaceable tool for troubleshooting and repairing electronic equipment by determining performance and health of electrolytic capacitors.
This LC Meter allows ,p801b measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors.
The building’s basically a 1-room apartment so this works out great with the remote. 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. Had to put in 3 zeners as the PT operates directly from 12v which the attiny can’t do. 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 think that code has a bug though as the logic low component of the syncbit should be 31 times the short-pulse duration according to the datasheet not 7.
Note below on the jumper blocks: He’s basically divided 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. Arduino Prototype uses all standard through-hole components for easy construction, two of which are hidden underneath IC socket. Which means I have to get up dahasheet look for it which is effectively as much of an annoyance as it was meant to solve.
I put it in a small electrical box with 2 push-buttons and installed it in an easy to reach location from the bed. The circuit includes an auto ranging as well as reset switch and produces very accurate and stable readings.
LPB Datasheet, PDF – Alldatasheet
The board runs off a 23A 12 volt stack battery. I popped the original remote open to see what I was dealing with. If I knew in advance that I’d be able to do this I would’ve designed a much smaller board. After some wasted time I caved and connected datashfet original remote’s encoder chip data output pin to the microphone input of my netbook.
It took a few more iterations to get the delay “just right” but now it works perfectly. The only light switch is across the room from my PC and it’s a pretty large room.