Hi!
My next project is to make tiny, without battery working device (an example coil and capacitor = resonance circuit) which can detect ~1 m distance. (An example 1 bit RFID device).
And this circuit which detecting the tiny circuit is my problem. I have try it with few circuit but without...
There is error in manual2:
"‘pwmout pin, off’ (=pwmout pin,0,0) command"
If I use high or low command after command pwmout pin,0,0 it doesn't work. I need to add command pwmout pin,off.
Yesterday I found many reason why I have problems with this.
- 2.transmitter power voltage too low
- wrong capacitor in R/C filtering. I was put smaller capacitor what I have used in test circuit!
- tiny SMD capacitor was disappeared from receiver circuit board (in the right hand side of the...
Some day it willl be more clear but some day can't read it property.
I have R-C-filtering but it's not sufficient. Bigger R-C filtering isn't answer, I have tryed it.
Box is mobile phone desktop charger from dealextreme.
Controllable hardware features:
-ON/OFF switch
-button
-315MHz wireless receiver
-inbuild antenna
-7 red SMD LED
-2-color red/green LED in center
-piezo element, PWM-controllable
-readable battery voltage
-vibration motor
-chargeable Li-Ion...
Now receiver hardware is ready.
I removed IC SC2272-M4, it will not need in this project. There is not too much space!
I need to modify almost all components outside of circuit board. PICAXE programming connector was too BIG so I need to found smaller.
More photos:
I need to modify a transmitter to get it fit to this box.
My plan is to make pocket size alarm typically like this black.
Like you can see, only thing what can see outside is antenna wire. :)
manuka:
I haven't hear this saying.
Truth is: Last thing what typically finnish does is to read instructions!
Using old and recycling is my way to do many things.
Yesterday I install 2 transmitter to old (Made by me 2008 with PICAXE) wired receivers ~100m length wire under ground, so now...
Hi!
I have circuit like file "TDL-test circuit.JPG".
Antennas length:
Transmitter: 85mm
Receiver: 25mm
Should any of leds 1-4 light when I press button S1?
Receiver chip datasheet.