Posts Tagged ‘CA3161’

99 mV to 999 mV meter schematic by CA3161-CA3162

This circuit can for example be incorporated into a diet to pressure warning. The meter can measure voltages from -99 mV to 999 mV. The circuit uses two ICs, the CA3161 and CA3162. IC1 converts the analog signal into a digital signal. IC1 is also the multiplexed signal to T1-T3 can be controlled. The BCD code is then fed to IC1 IC2, a BCD/7-segments converter. Then the signal is fed to the displays. Pin 6 of IC1 (hold) can be used for a number of things. When pin 6 is grounded or open, the 4 Hz sampling frequency. When pin 6 is at 1.2 V, then enter the HOLD function is activated.

The output will remain unchanged, so the display is put down. If pin 6 is at 5 V, the sampling frequency 96 Hz. Adjusting the meter is through the HI and LO inputs to GND. P1 is then adjusted so that the display “000″ indicates. Then a known voltage from 0 to 1 V is connected to HI and LO (LO to GND). The display then P2 so cut that regulates the voltage in mV is indicated. With voltage dividers, the range can be increased. The points of the displays can be used by dp 1, 2 and / or 3 to GND. R1-R3 = 220 ? P1 = 10 kOhm 10 or 15-turn trimming potentiometer P2 = 5 kOhm 10 or 15-turn trimming potentiometer C1 = 270 nF T1-T3 = 636 BC IC1 = CA 3162 IC2 = CA 3161 LD1-LD3 = 7-segment LED display common anode http://www.circuitsonline.net/schakelingen/60/meten-en-testen/3-digit-dvm.html

Related links
Digital Volt Meter

CA3161 BCD to Seven Segment Decoder-Driver

CA3161 BCD to Seven Segment Decoder-Driver
The CA3161E is a monolithic integrated circuit that performs
the BCD to seven segment decoding function and features
constant current segment drivers. When used with the
CA3162E A/D Converter the CA3161E provides a complete
digital readout system with a minimum number of external
parts

Source: Intersil Corporation

http://www.intersil.com/cda/home/

Car Temperature Gauge by IC CA3162 + CA3161

The Car Temperature Gauge is basically the same circuit as March’s project with some minor changes to the input circuit. This circuit will display the water temperature to 1 degree resolution.

From :: http://home.maine.rr.com/randylinscott/apr99.htm

Related Links
Temperature Control circuit
Car temperature gauge
Temperature meter
More circuits use CA3161
Digital Measurements Temperature by LM335
Opto-Thermo Control Relay Switch with IC 741
Frost Alarm or Cold Activated Switch by IC 741