LED transistor flasher
One of the simplest schemes in amateur radio electronics is the LED flasher on one transistor. Its production can be done by any newcomer who has a minimum set for soldering and half an hour of time. The considered scheme, although it is simple, however, It allows you to visually see the avalanche breakdown of the transistor, as well as the operation of the electrolytic capacitor. Including, by selection of capacity it is possible to easily change the frequency of flashing of the LED. You can also experiment with input voltage (in small ranges), which also affects the operation of the product.
Design and operationThe flasher consists of the following elements:
- power supply;
Required materials and radio componentsTo assemble an LED flasher with your own hands, working from a power source with a voltage of 12 V, you will need the following:
- soldering iron;
- 1 kΩ resistor;
- capacitor with a capacity of 470-1000 μF at 16 V;
- KT315 transistor or its more modern analog;
- classic LED;
- simple wire;
- 12 V power supply;
- matchbox (optional).
- The last component acts as a body, although you can assemble the circuit without it. Alternatively, a circuit board can be used. The hinged installation described below is recommended for beginner hams. This method of assembly allows you to quickly navigate the scheme and do it right the first time.
Flasher assembly sequenceManufacturing a 12 V LED flasher is carried out in the following sequence. First of all, all the above components, materials and tools are prepared. For convenience, it is better to immediately fix the LED and power wires to the case. Next to the conclusion "+" you should solder the resistor.
The paper model of the Nakajima Ki-84 Hayate fighter
Chocolate Hearts Donuts
Wild Berry Cheesecake