An RX for HF anti burglar of pocket

It's a small UHF radio receiver that receives the signal from the transmitter (for the latter see previous story) as they are close, everything is fine and the receiver remains silent, but if they are away, the buzzer associated with it starts screaming and warns us of the event!

Figure 1: Diagram of RX for locks pickpocketing.

This receiver is for use with the small transmitter UHF 433.92 MHz to produce a system lock or anti-pocketing distance HF.
The construction of the RX will not be a problem if more than the care you bring to your work.
It's also a montage dedicated to beginners. Figure 1 shows a diagram and list of components will allow everyone to get it right.
All necessary components are again available from certain advertisers of the magazine.

Figure 2: Photograph of a prototype of platinum anti-theft system for the RX-pocketing.

hybrid receiver module can be directly soldered into holes in the PCB and then inserted into a socket strip. Integrated circuits are mounted on stands. The 12V battery is determined by its electrodes welded to it. The UHF antenna is a simple piece of insulated copper wire 17 cm. The small dimensions of the RX you will at his discretion.


Iist ET587RX
R1 ...... 680 Ω
R2 ...... 390 kΩ
R3 ...... 220 kΩ
R4 ...... 2.2 MΩ
C1 ...... 22 uF 35 V electrolytic
C2 ...... 330 nF 63 V polyester
C3 ...... 10 nF 250 V polyester
C4 ...... 10 uF 100 V electrolytic
D1 ...... 1N4148
DZ1 ..... Zener 5.1 V 1 / 2 W
LD1 ..... LED 3 mm red
BZ1 ..... with electronic buzzer
U1 ...... RF290-433
U2 ...... MC145028
U3 ...... 4093
SW1 ..... slide switch

Miscellaneous:
1 support 2 x 8-pin
1 support 2 x 7-pin
3 2-pin jumpers
1 row female / male 15 holes / pins for the hybrid module
1 pair of clips for 12V battery for printed circuit