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Recent content by carlmbecker

  1. C

    Need working code for RFM22B module.

    Thanks - managed to get it working. Subtle timing in the port to G12 caused problem. Thx Cb
  2. C

    Need working code for RFM22B module.

    Anyone have working C source using the RFM22B module from HopeRF ? Versions of PIC code I have found do not seem to work --- only receive constant data from FIFO. Thanx in adv. CB
  3. C

    Rfm22b

    moved message to comms forum.
  4. C

    Charging cap in quickest time

    Thanks very much BtR - this is great and very helpful. For interest what simulation package are you using ?
  5. C

    Charging cap in quickest time

    ************************************************************************************ Thanks - I did forget to mention I need to charge the cap up to 48V. This may change quiet a few things
  6. C

    Charging cap in quickest time

    I am looking for some help in determining inductor (physically small as possible) and frequency etc. to charge about a 4700uF cap in about 0.8seconds (800mS) to a level of 48Volts with a 9V power source. - thanks in advance cb i.e. Step up converter from 9V to 48V capable of charging 4700uF in...
  7. C

    best measurement method ?

    Thanks FvM points noted but because I have access to both input and output signals I would prefer the simpler way.
  8. C

    Interfacing TC35i Problem

    Depending on how the device was set up - maybe its trying to register on the network - in which case it will draw large current spikes - check current again.
  9. C

    schematic diagram problem

    Q5 looks out of place. try a pnp transistor
  10. C

    best measurement method ?

    Hi all. What would be the best measurement method for the following impedance measurement :- I am injecting a signal of a few Hz (10Hz) up to a few MHz (3MHz) in increments of a few Hz. I then measure the injected signal and the returned signal which varies in amplitude depending on the...
  11. C

    Amplifier with DC offset control

    Hello Looking for a (50W to 100W) amplifier which also has DC offset control. Circuit or where to buy. (Frequency response anything up to 10KHz to 20KHz is good enough) Thanks in advance
  12. C

    Help on Switched Spply Desgne

    Look at the L5973D from ST - cheap and available and low component count
  13. C

    Ongoing problems with X2 mains capacitors in triac switch application

    try using series resistors in line with the caps. (~39E)
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