by Spike Tsasmali
Now that you have bought that new DVD player, you have probably found out that you have to connect it to your TV through the AUDIO and VIDEO inputs. But your TV does not have AUDIO or VIDEO inputs...What do you do??
Don't Panic! All you have to do is build this simple RF modulator and you're in business!
This simple RF modulator uses the same type modulator module used in many VCR's. The picture quality is superb and the simplicity of the design makes it easy for even the beginner to build.
Download the PC board file, rfmod.pcb from the Lupine Systems Download Site. The Component Placement diagram are both on the 1 Mid Layer of the layout file.
| Part | Description |
| C1 | 10uF 16v Radial Aluminum Electrolytic |
| C2 | .1uF (104) Conformal Axial |
| C3 | 4700uF 16v Radial Aluminum Electrolytic |
| J1 | Dual RCA Jack |
| R1 | 75 ohms, 1/8 watt |
| R2 | 220 ohms, 1/8 watt |
| U1 | Alps RF Modulator MDLK5A-1 or Sharp E7853 |
| U2 | 7805 5-Volt Regulator IC |
| Z1 | Bridge Rectifier, 200v 1A |
| -- | PC Board |
This project can easily be assembled on the PC board layout provided or can be breadboarded using pad-per-hole board. Since the RF modulator module draws such low current, you will not need to use a heatsink on the power regulator U2.
Remember that Lupine Systems offers complete parts kits including many PC board for all items mentioned on the website. Just send an E-mail to WOOFY for more information!
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