Musical Sound to Neon Light Flasher

Neon Light Flasher was made by me when i was young, it was even published in a magazine, i think it will work, it was used on a very old huge ornamental valve philips stereo system in the remote speakers.

Home Made Circuits

Recently i captured this circuit in eagle to publish online, it seems to have a small design error. It worked well for many years. The step-down transformer is used as a step-up here. The secondary winding was around 50mA so the resistance was protecting the 2N2222. (SL100 was used in the original one). C1 and R3 may need tweaking to get the desired adjustment range in R2.

Music Sound to light converter

The voltage across the speaker is fed to C1-Gnd, which blocks DC component. R1, R2, R3 form a threshold bias for T1. 2N2222 chops the 12V DC in tune with the music.

Basics of Electronics

The chopped DC current flowing in the 12V winding of TR1 is stepped up into AC pulses over 100V, this lights the Neon in flashes synchronizing in real-time with the beats. Known Issues – It does not perform well at low Bass like 20Hz.

One more use of neon is like a flasher. This can easily alert a person monitoring a machine or process. It can be used in a limit alarm or to indicate a equipment is operating well.

Flashing Mains Neon Lamp – Here is a Neon Flasher circuit (untested) for a user request at Elex Quna. This can be built into a switchboard or a gadget for indicating Live Power.

Relaxation oscillator – In electronics a relaxation oscillator is a nonlinear electronic oscillator circuit that produces a non-sinusoidal repetitive output signal, such as a triangle wave or square wave.

  • Mains Current Indicator with a LEDMains Current Indicator with a LED
    This is a mains 230V AC load current indicator and is a LIVE CIRCUIT, so take care. The Resistors have to be a fusible ceramic [...]
  • DC-DC SSR Solid State RelayDC-DC SSR Solid State Relay
    This is a DC Input DC Output SSR Solid State Relay. It was made for Printing or Photo Processing Equipment. It has an optical isolation [...]
  • 0-1V to 4-20 mA Converter0-1V to 4-20 mA Converter
    This two opamp circuit converts analog voltage signals to current (sink) signals in a proportional manner. Current signals are more immune to noise and cross [...]
  • Battery Backup SupplyBattery Backup Supply
    This is a 9V power supply which will work even on power failure. It uses a rechargeable battery and regulators. A transformer with 15-0-15 AC [...]
  • Millivolt Source – Field Calibration Current LoopMillivolt Source – Field Calibration Current Loop
    This is easy to rig millivolt source for field calibration or troubleshooting of 4-20 mA current loops. Here a Darlington pair is used for current [...]
  • Regulated High Voltage Power SupplyRegulated High Voltage Power Supply
    The Circuit below is a paper design and not tested. It can be used for education and information, this can help you make your own [...]
  • Voltage Doublers and MultipliersVoltage Doublers and Multipliers
    Voltage multipliers are used to obtain low current high voltage, from an existing AC Source. Step up transformers can be used, but the insulation problems [...]
  • PLL using 4046 – Phase Locked LoopPLL using 4046 – Phase Locked Loop
    CD4046 is a PLL or phase lock loop, it mainly consists of a VCO and phase comparators. This is a component in FM demodulation and [...]
About delabs 152 Articles
Product Design - Industrial Automation and Instrumentation. -

Be the first to comment

Leave a Reply