Controller Circuit

If the article before is about transmitter, so this is the receiver for the RF remote control. This circuit is using RF receiver module RLP434A at 418MHz. This circuit is control using microcontroller. The 2 relays with can handle any electric (or electronic) device up to 10 Amps (the contacts of my relays are 10Amp at 250Volts). Here’s the figure of the circuit.

The RLP434A is an RF receiver module with receipt frequency at 418MHz with ASK modulation. There are 2 outputs from this module, the digital, with levels from 0v to VCC (5 volts in our case) and the analog output. Analog output is not used. The transmitter send 4 bytes with 2400bps 4 times and the receiver RLP-434A, collect them and move them to AT90S2313 to RxD pin, PD0. AT90S2313 use a hardware UART adjusted at 2400bps and the hardware the UART is more stable, with smaller code, than software UART that I use in the transmitter. If some serial data arrive at the middle-time of some other routine other than receive routine, for sure we will loose this bits of data. The hardware UART does not have this problem because have buffer for this (UDR register).