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Vintage Simplex Celestra 2301 Time Recorder Digital Wall Clock NEW NOS RARE For Sale

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Vintage Simplex Celestra 2301 Time Recorder Digital Wall Clock NEW NOS RARE:
$199.95

Vintage Simplex Celestra 2301 Time Recorder Digital Wall Clock NEW NOS RARE. Shipped with USPS Ground Advantage.

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Vintage Simplex (Fire Alarm Bell )Type 4080-5 Electric Wired .11amps 24-28 Volts

$29.70

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Vintage Simplex Celestra 2301 Time Recorder Digital Wall Clock NEW NOS RARE

$199.95

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Vintage Simplex 4251-111 Fir Alarm Pull Station

$24.99

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Alarms and Indicator Circuit diagrams

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Audio electronic circuits list

• Stereo Channel Selector
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Circuits for Cars/Motorcycles

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Computer/PC Hardware Circuits :

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Design Ideas :

• Soft ON/OFF switch

Fun/Games Circuits :

• Electronic Scoring Game
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Signal/Sequence/Misc. Generators :

• Simple IF Signal Generator

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Lights & LED Circuits :

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Motor Circuits :

• Automatic Speed Controller for fans & Coolers
• Soft Button type Motor Direction Controller
• Super simple stepper motor controller
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Music related Circuits :

• Digital Volume Control
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< Oscillator Circuits :

• Simple variable frequency oscillator
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Power Supply (PS) Circuit diagrams :

• Negative supply from single positive supply
• Self switching Power Supply
• Ultra low drop linear voltage regulator

Radio,transmitter,receiver circuits :

• Car anti theft wireless alarm.
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Remote Control Circuit diagrams :

• Remote control using VHF modules
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• A simple Remote control Tester
• Clap Activated Remote
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Robotics related Circuits :

• Magnetic proximity sensors
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Sensors :

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Telephone Circuit diagrams :

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Test & Measurement Circuits :

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