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Futaba S3001 Indirect Drive Servo
Operating Voltage: 4.8-6.0 Volts
Operating Speed (4.8V): 0.23sec/60 degrees at no load
Operating Speed (6.0V): 0.19sec/60 degrees at no load
Stall Torque (4.8V): 44 oz/in. (3.2kg.cm)
Stall Torque (6.0V): 57 oz/in. (4.1kg.cm)
Potentiometer Drive: Indirect Drive
Bearing Type: Ball Bearing
Gear Type: All Nylon Gears
Connector Wire Length: 12"
Dimensions: 1.6" x 0.8"x 1.4" (41 x 20 x 36mm)
Weight: 1.6oz. (45.1g)
how to program and hook up a atmega168 chip as a minimal arduino, using the internal 8mhz oscillator and running at 3.3 volts:
Ready to have a volume knob added to it! This game is cool, but Mattel should have included a volume switch of some kind.
Vacuum tubes, resistors, diodes, a Tube Screamer guitar pedal, transistors, terminal strips and more!
J1 provides the programming port from the PC via a CH340G USB to Serial adapter IC. J6 is a 2-pin jumper that when fitted supplies power from the USB port to the circuit to run the system and power it during programming.
This also allowed almost all the software to be developed without 240V mains connected. All that was required in addition was a screwdriver to simulate the input signals (by shorting the opto-isolator output to ground) and a pulse generator.
The pulse generator is setup to provide a 0-5V square wave, 100Hz with a 1% duty cycle (predominantly low). The output from the pulse generator is connected to the zero-cross opto-isolator output to simulate mains voltage cycles.
Signals and LEDs are driven separately to provide some confirmation that a signal has been seen/generated by the Arduino independently. It also provides for flashing the LEDs to indicate the maintenance mode without pulsing the mains supply to the pumps.
Dirty Electronics Mute Synth custom modified by A.S.M.O. for Daniel Miller (The Normal / Mute Records).
Touch panels hardwired to pots and switches, 3 LFOs, one for each oscillator and feedback.
Low / band pass resonant filter with external voltage control input, self oscillates at full resonance.
Panel is covered in (warm) leatherette, nice!
Saike 898D Rework Station - another view of mains inlet lead with no strain relief other than grommet, plus fuse on neutral plus no earth connection.
Consumer Electronics are a man and a woman. The woman makes intense electronic music while the man shouts obscenities. He also threw beer into the audience, hitting one woman who was sufficiently annoyed that she poured a pint of slops over him.
Saike 898D Rework Station - view with back panel removed. Glad I didn't turn this on before opening.
Electronics are everywhere in Korea, and they can be found for dirt cheap prices, most notably at the Yongsan Electronics market in Seoul. If you like computers and gadgets Korea is the place for you.
This is the start of a build for a four channel DAC board.
While working on the design of a Z80 synth I wanted to make the synth polyphonic and capable of playing up to 4 notes at once.
I started with the idea of creating software digital waveform generators and summing using signed addition in to one stream to feed a single 8 bit DAC. As the design went on it was obvious the calculations would take too much time and reduce the highest frquency I could play notes at. As well it would of needed additional code for scaling and filtering each of the four waveforms to prevent overun and digital distortion occuring.
So I decided to send each of the software waveform generators to its own 8 bit DAC and the outputs of these are combined with an analouge mixer instead of doing software summing. In addition to this each DAC has its own analogue low pass filter to reconstruct the output waveform from the DAC,s output before going to the mixer stage.
More photos to follow...