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 Digital logarithmic sweep signal generator circuit

Wednesday, October 22nd, 2014

This is a Digital logarithmic sweep signal generator circuit by use the average digital, It is designed to use together with the frequency generator by voltage controller. How it works From the circuit in figure 1 is the 14-bit binary counter circuit, that input is synced with the output of oscillator generator circuit. Then, the […]


 Tape head preamplifier using UPC1032

Wednesday, October 22nd, 2014

This pre-tape circuit is cheapest for beginner only. And easy to builds because use one IC-UPC1032 only as Figure 1. Fig1: The circuit diagram This is stereo can connect to the tape header that resistance between 200-600 ohms at output amplitude about 250 mV. Fig 2: The PCB layout The power supply voltage that can […]


 5 volts DC Regulator Without Transformer Using MOSFET

Wednesday, October 22nd, 2014

This is 5 volts DC Regulator power supply that without the transformer so small size, use the MOSFET is based. It is suitable the digital circuit. Caution! This circuit requires very careful to create. Because there is a high voltages many areas. The diodes D1 to D4 are used to convert AC power line to […]


 10V to 350V Adjustable Regulator DC Power Supply

Tuesday, October 21st, 2014

Here is an adjustable regulator DC power supply circuit that can be provided the output high voltage is 10V to 350V. It use the transistor is based so we use often use them. Now, a transistor can tolerate more high pressure. For example; in this circuit we will use number of BU 111 or BU […]


 Electric fish shocker circuit

Saturday, October 18th, 2014

This is the simple electric fish shocker circuit or fish stunner. It helps in catching fish easier, it use 12V battery to convert to 220V AC. We use few parts so easy and cheap. How it works This circuit convert voltage from 12V battery to AC 220 volts. Both transistors will alternately work ON and […]



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