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fixed current sources
input 5...55V output 250µA constant current circuit needed.
Total circuit current must be <=400µA
This is smilar basic circuit. But not enough for full input range. Output current has small changes depending on input voltage.
Your suggestions to modifiy this circuit ...
Ok. Transducer doesn't immediately stop .
If mcu waits about a few 10uS can I detect echo from Transducer ?
The mcu how much time should wait before detecting echo?
PS. The project doesnt need to measure short ranges. Only 1m+ ranges neded.
I don't have scope to see doesn't immediately...
ultrasonic capsule
**broken link removed**
Ultrasonic Range Meter systems uses 2 transducer. Unit transmits a wave about 40kHz and waits echo... Transmitter and receiver capsules looks like same case (2-3nF).
Can I use Transmitter capsule as receiver capsule while listening echo?
with...
kt3170
Ok. thanks.
I found a nice projects for decoding DTMF without kt3170. If some friends interest it, The project here:
**broken link removed**
This circuit uses PIC's comparator. For detecting DTMF tone.
cm8870
My circuit already contains cm8870 for DTMF decoding.
I want to use its opamp output to my mcu input for detecting other tones (call back, dial tone etc). Is the Is it posible?
Opamp out is about 5Vpeak while tone occurs?
PS: I don't have scope :|
eeprom emulator
Some chips are on board. PIC , 93c46, and others. I want to remove 93c46 with pic code .
Chips should read the data from pic. SHIFTIN or shiftout not useful. Because pic should not generate the clock while reading . Only will send shifted data according to clock and address...
config word 18f452
18f452 and correct fuses with IC prog impossible.
ICprog has some problems for writing 18f452 fuses
Use winpic800 software with same hardware
usb internal regulator pic18f4550
I thought for only pic 18f4550
"if full speed needed, usb2.0 compatible port needed."
Because of I tried modifiying config etc. accordig to *.inc
mikroc 18f4550 usb
I modified some sample projects (cdc demo, hid demo etc.) to compatible low speed. It was ok. no problem. The projects works fine as low speed mode.
Unfortunately, I have to use pic18f4550 as Full speed but usb 1.1 compatible. is it possible?
I believe that this is...
rf transmitter ic
I bought BH1416 from futurlec. It works with 7.7Mhz xtal and also works with 8.xxx xtall and rf section works also without xtall.
Of course xtall needed to vco control for stable frequency. But output frequency changed according to xtall difference from 7.6. and LC section...
Re: PIC START PLUS FOUND
warp13 programmer emulates picstartPlus programmer with or without mplab.
**broken link removed**
**broken link removed**
edited by Cl
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