Voltmeter with LED for car battery

Car Lamb Failure switch

Auto back flash STOP

Car 12V Battery Charger

Battery  Circuits  

Car 12V Battery Charger 

Discharge Idicator for 12V Battery (Lead Acid)

Stand by Battery

Supply Power circuits      

Power supply +13.8V 5A with LM338

Voltage Regulators with L200

Different out voltages from 12V Battery 

Power Supply +50V 3A ,stabilised and regulated

Mini power supply adj. 0V-15V /1A

Power Supply 0-30V / 0-2A variable with MC1466L

Power supply for power amplifier 100W vmosfet 

Alectronic Fuse for Power Supply. 

12Vdc to 220Vac 50W Converter

Measurement / Test circuits

DC Voltmeter with High input impedance

Digital Volt and Ambere meter

High Temperature ALARM         

Tester for transistor, diodes and SCRs by F.V.Hughes

Digitální teploměr

STETOSKOP

Switch Electronic circuits       

Electronic On/Off Touch Switch

Electronic Switch ON-OFF touch or with push button

Voltage window switch

Light sensitive and differedial temperature switch

Temperature window switch

Signal and Tone Activated Relay Switch

Over and under voltage switch with relay

Light Effects and Controllers circuits 

Flasher with 2 LED

Electronic Touch Dimmer

Light sensitive and differedial temperature switch

Photodetector

Electronic Security  door key 1

Electronic Security  door key 2

Digital circuits              

Electronic Siren

Electronic Dice [1]

Electronic DICE [2]

Digital Roulette with  Display

Melody Door Ringer

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