Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
The device is intended to use in low power measurements because his limits: -45dBm to 15dBm.
Is based on MAX9933 as logarithmic detector and ATMEGA 8 for calculation and display the level of power.
Because the specifications of MAX 9933, i had to brake the entire frequency band (1-1600 MHz) in...
Hello!
try to modify the 9pF capacitors at one pair of doorbells (increase/decrease) let say with 10pF or 8.2pF without touch the coils. If you have an frequency counter able to measure UHF, you can see the new frequencies (by the way these are in the range of 433 MHz).
why don't you try LM2576T-ADJ? It has short circuit protection and require few and cheap components? Look up for schematic on National Semiconductor site.
for those who are interested to realize frequency counters i submit here the schematic and firmware for the one i made 2 months ago
The frequency counter is based on PIC 16F628A and the 7-segment display is realized with MAX 7219
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
