RDA5807 FM 87-108MHz Radio Receiver LCD1602 DIY Kit
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Step 12: Install 1pcs DIP-40 IC Socket at U1.
There is a gap mark on one end of the IC Socket and there is a gap mark
on PCB silk screen where the IC Socket can place on. These two
marks are corresponding to each other and are used to specify the installation
direction of the IC Socket.
Step 13: Install 2pcs 22pF Ceramic Capacitor at C1, C2.
Step 14: Install 3pcs 0.1uF 104 Monolithic Capacitor at C10, C12, C13.
Step 15: Confirm and identify the installation direction of the KA2284.
Step 16: Install 2pcs ZIP-9 KA2284 LED Driver at KA2284.
Step 17: Identify the positive(anode) and negative(cathode) lead of LED.
The leads of the LED must be installed correctly, otherwise the LED cannot be
turned on.Here are four methods as following:
1. According to the length of the LED lead to distinguish. The longer
pin is positive(anode) lead. The shorter pin is negative(cathode) lead.
2. Identify the negative(cathode) of the LED is to look into the plastic
case where one can see that the negative(cathode) is much thicker/bigger
inside the plastic case than the anode lead.
3. Identify by edge of plastic case. The negative(cathode) lead of the
LED should be the pin nearest the flat on the plastic case.
4.Test by 3V battery or multimeter. The pin is positive(anode) lead
which has connect to the positive of 3V if LED can light up after connect 3V
power supply.(LED should not be powered directly from the 3V for a short
time:less then 0.5second)
5.It is positive(anode) where the white mark “+” pointing to on PCB.
Step 18: Install 10pcs 5mm RGB LED at LED1-LED10.
Step 19: Install 1pcs 16Pin DuPont Female Socket at LCD1602.
Step 20: Bend the pins of only one 4.7uF electrolytic capacitor about 2mm.
Note:Just for only one!
Step 21: Install this Electrolytic Capacitor at C7.
Step 22: Install others 8pcs 4.7uF Electrolytic Capacitor at C3, C5, C6, C8,
C11, C14, C15, C16 .
Step 23: Install 2pcs 4.100uF Electrolytic Capacitor at C4,C9.
Note: Pay attention to distinguish between positive and negative.The
Longer pin is positive pole.
The capacitor needs to be placed horizontally, keep a distance of 2mm
between the capacitor and the PCB when installing.
Step 24: Install 1pcs DC-005 Power Socket at J1.
Step 25: Install 2pcs 5.8*5.8mm Self-locking Button at S4, S6.
