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How to solder SMD chips
How to solder SMD Chips by practice. At first, I tinned all the circuit board pads for the SMD chips before trying to mount them. That was a mistake. With both pads for chip tinned, heating up one end of the chip caused the situation in Figure 5. When heat was applied to the other [...]
FM transmitter with SMD
Let’s construct a low-power FM transmitter using surface-mount devices (SMD) that will be received with a standard FM radio. Soldering surface mounted devices is not so hard and actually is quite easy. There are many designs for small FM transmitters but they have some problems. First, you need an audio amplifier to get enough modulation. [...]
LM386
LM386 General Description:
The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.
The inputs [...]
