Get t a transmitter board (TWS-434A). Select the logic or data to send to the receiver (RWS-434) by using the switches SW1-SW4. The numbers "434" stand for 434MHz (see Resources below).
For electronics hobbyist, tinkering with things is very common. Oftentimes, you can find them opening up different items in order to study their inner mechanisms in hopes of creating and improving on the design. Yet, some would rather start from scratch in order to build a gadget to make their lives easier, or simply just for fun. It is true that simple remote controls are not expensive, and building one may cost more than the ready-made ones, but nothing is better than creating something on your own. Here are some high-level steps to help you start building a simple remote control.
- TWS-434A (transmitter)
- TWS-434 (receiver)
- Encoder pins (Holtek HT-12E; D0-D3)
- Decoder pins (Holtek HT-12D)
- PNP transistor
- 5V amp
- 22-gauge wire
Transfer the logic levels present to the receiver by using encoder pins D0-D3.
Break the circuit ground connection using another switch. Doing so will let you transmit by using a push of a button.
Plug the transmitter module directly into the transmitter circuit. This will send serial data to the receiver circuit.
Build the interface circuit by plugging the receiver board into the receiver circuit. Use the data output to connect to the HT-12D (decoder) and the HT-12E (encoder).
Attach the base of the PNP transistor directly to the data output pin D0 on the HT-12D.
Hook up the contact or relay to the voltage required. Use 5V on both the encoder and decoder circuits.
Connect a quarter wave antennae to both circuits. This will extend the range of the remote control to several hundred feet. Use 9.36 inches of 22-gauge wire. Keep in mind that the range depends on your remote control's design as well as environmental conditions of your location. Without adding the wires, your finished remote control will only be good up to 50 feet.
- Photo Credit nacu?morguefile, reynoldselectronics
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