ICM7225 frquency counter - Electronic Circuits Projects Diagrams Free

asi · 24th May 2006, 08:34 AM

Hi,

I would like to build a frequency counter, using a MAXIM ICM7225 IC.
However I cannot find any circuit on the Web, corresponding to my application.
The only I've got is a circuit with two ICM7224s (same as ICM7225 but LCD) in cascade, the oscillator/timing is based on ICM7207 (+crystal).
My problem is, that I need only a single (4 1/2 digit) circuit, and couln't get a 7207.
Does anybody have a working circuit (and probably PCB) for ICM7225/7224 and without an ICM7207?

Thanks is andvance

philba · 24th May 2006, 05:49 PM

got datasheet?

asi · 25th May 2006, 05:48 AM

Yes, I've got its datasheet, but I cannot design the enable, start/stop counting, and reset inputs for such a counter, to work as a frequency meter.

asi · 26th May 2006, 06:13 AM

The worst is, that I cannot find a substitue for ICM7207A

rigdoctor99 · 29th May 2006, 01:50 AM

I have just looked at the data sheet for the for the ICM7225 and it shows the circuits that you need. It is a very simple 4.5 digit counter....... Have another look at it, and if you dont have the full data sheet just go to:

http://www.maxim-ic.com/index.cfm

asi · 29th May 2006, 12:35 PM

Thanks,

I!ve got this datasheet before.
My problem was (is), that I need a circuit that provides (from an XTAL) the gate timer / start/stop counting signals.

asi · 2nd June 2006, 09:33 AM

I've got some infos, that the needed circuit is able to be designed with a CMOS oscillator/divider CD4060 (Xtela 3276,80 kHz). It will provide a signal of 200Hz, than the 1 HZ and the 0,Hz can be made with the additional ICs CD4024 (100Hz out), CD4518 (out 1Hz) and finally the CD4017 (out 0,1 Hz).
However there is no circuit provided to the infos.
Does anybody has such a design?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

24th May 2006, 08:34 AM	#1
asi	ICM7225 frquency counter Hi, I would like to build a frequency counter, using a MAXIM ICM7225 IC. However I cannot find any circuit on the Web, corresponding to my application. The only I've got is a circuit with two ICM7224s (same as ICM7225 but LCD) in cascade, the oscillator/timing is based on ICM7207 (+crystal). My problem is, that I need only a single (4 1/2 digit) circuit, and couln't get a 7207. Does anybody have a working circuit (and probably PCB) for ICM7225/7224 and without an ICM7207? Thanks is andvance

25th May 2006, 05:48 AM	#3
asi	Yes, I've got its datasheet, but I cannot design the enable, start/stop counting, and reset inputs for such a counter, to work as a frequency meter.

26th May 2006, 06:13 AM	#4
asi	The worst is, that I cannot find a substitue for ICM7207A

29th May 2006, 01:50 AM	#5
rigdoctor99	I have just looked at the data sheet for the for the ICM7225 and it shows the circuits that you need. It is a very simple 4.5 digit counter....... Have another look at it, and if you dont have the full data sheet just go to: http://www.maxim-ic.com/index.cfm __________________ I Think!! Therefore I get a head-ache and drain bamage........

29th May 2006, 12:35 PM	#6
asi	Thanks, I!ve got this datasheet before. My problem was (is), that I need a circuit that provides (from an XTAL) the gate timer / start/stop counting signals.

2nd June 2006, 09:33 AM	#7
asi	I've got some infos, that the needed circuit is able to be designed with a CMOS oscillator/divider CD4060 (Xtela 3276,80 kHz). It will provide a signal of 200Hz, than the 1 HZ and the 0,Hz can be made with the additional ICs CD4024 (100Hz out), CD4518 (out 1Hz) and finally the CD4017 (out 0,1 Hz). However there is no circuit provided to the infos. Does anybody has such a design?