Nocturnal Animals WhiskerThis circuit has proved very useful in keeping away from a terrace or a porch some bats and other nocturnal animals. You can use it for similar or different purposes. The lamp illuminates for a 4-5 s ... readmore
Tone generator circuitSimple, low component count tone generator. It can be adapted to create a morse code circuit, by adding a switch to the output.
How it works:
This circuit is based around the 555 timer circuit, use ... readmore
Based LM324 LED VU-Meter
This circuit uses two quad op-amps to form an eight LED audio level meter. Vu meter
The 1K resistors in the circuit are essential so that the LED's turn on at different audio levels. This circ ... readmore
Headphone AmplifierHeadphone Amplifier Circuit : Andy CollinsonEmail MeDescription:An amplifier to drive low to medium impedance headphones built using discrete components.Notes:Both halves of the circuit are identica ... readmore
LM338 Power Supply Regulator 13.8V 5AMany times we needed one relatively powerful supply in order to we supply various appliances with + 13.8V, as transceivers CB, charge lead-acid batteries, etc. The circuit it uses known completed tha ... readmore
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