Camera on Model Train

Without doubt, one of the secret wishes of many train fans is to be able to step into the role of the engine driver on a real train. With this project, you can at any desired moment consider yourself to be the master of your own model train, and you can direct it over the model train layout from the perspective of the engine driver.In order to display the view from the model train on a television set or monitor, you will need a video camera, a transmitter and a receiver. Since these components are readily available at reasonable prices, they are not particularly interesting as DIY projects.However, one thing that you will have to devote some attention to is the power supply for the entire setup. In order to ensure reliable transmission of the picture, the delivery of power to the camera and transmitter must be ensured at all times. Temporary loss of contact with the supply rail must not cause picture information to be lost. A mini-UPS (uninterruptible power supply) ensures that this does not occur.

Resistors:
R1 = 270Ω
R2,R4 = 470Ω (option 1)
R3 = 270kΩ
R5,R8,R12 = 33Ω (option 1)
R7,R9,R10,R11 = 33Ω
R6 = 10kΩ
Capacitors:
C1,C2 = 22pF ceramic
C3 = 220µF 25 V radial
C4 = 47µF 25V radial
C5 = 470µF 16V radial
C6 = 47µF 16V radial
C7,C9 = 100nF
C8 = 47µF 6V radial
Inductors:
L1 = 33 µH (40 turns. 0.25 mm diam./SWG32 enamelled copper wire on ferrite rod, 4 mm dia., 15 mm long)
L2 = 150 µH miniature choke
Semiconductors:
D1,D3,D10 = 1N4001
D2,D5-D8 = SB130
D4,D9 = 1N4148 (option 1)
D11,D12 = high-power IR-LED (option 1)
T1 = not fitted
T2 = BC847 of BC547 (option 1)
IC1 = LT1301CN8 (Linear Technology)
IC2 = LM2940CT
IC3 = 78L05 (only with 5V camera)
IC4 = PIC16F84 (programmed, for Super-Loco Decoder, # 996523-1
IC5 = ULN2004
Miscellaneous:
X1 = 4 MHz quartz crystal
L1,L2 = miniature bulb 5V/50mA (option 2)
PCB, order code 000129-1