CampaSynth
  • TTSH
  • DDRM
  • DDRM Expander
  • Photo Albums
  • Content
  • Timeline
  • Categories
Home / Categories / TTSH / Essays / TTSH Sample and Hold, Internal Clock, Analog Switch and Amplifiers Done
May 9, 2015

TTSH Sample and Hold, Internal Clock, Analog Switch and Amplifiers Done

Earlier this week I've finished the Sample&Hold, Internal Clock and Analog Switch part:

Main Board, Sample&Hold, Internal Clock and Analog Switch CompletedComponent side, jacks and sliders still missing.

The 1.5µF electrolytic capacitor (bright blue) at the bottom wasn't available with Mouser, but luckily I had a few of these from the past. Then I had made a little mistake: Soldered in a 10Ω resistor instead of a 100Ω one (near the 1.5µF capacitor, in vertical position). I only noticed when a 10Ω resistor was missing for the next section, the amplifiers part. Removing the vertically positioned resistor and putting back in the correct one was not that easy.

[Update] Then only later I detected that the analog switch was not working correctly. Channel A was always on. I had overlooked to solder one side of a 3.3MΩ resistor that controls one of the 2N5172 transistors, which actually can be clearly seen in the top-left corner of the above image. The fix was thus easy, luckily.

Main Board, Sample&Hold, Internal Clock and Analog Switch CompletedBack side, jacks and sliders still missing.

And thus also the amplifiers part was finished:

Main Board, Amplifiers CompletedComponent side, connectors and slider still missing.
Main Board, Amplifiers CompletedBack side, connectors and slider still missing.

Read more in TTSH

TTSH LED Drivers, Jumpers and Headers Done TTSH Mixer, Reverb, Noise and Voltage Proc…
View all essays by month
View all essays by category
  1. 21

    TTSH

  2. 1

    DDRM Expander

  3. 1

    DDRM

Links
  • TTSH 21: PSU Reloaded
  • TTSH 20: Midi2CV
  • TTSH 19: Case
  • TTSH 18: Test of Finished Board
  • TTSH 17: Main Board
  • TTSH 16: LED Drivers, Jumpers and Headers
  • TTSH 15: S&H, Internal Clock, Analog Switch and Amplifiers
  • TTSH 14: Mixer, Reverb, Noise and Voltage Processors
  • TTSH 13: Preamp, Envelope Follower and Ring Modulator
  • TTSH 12: VCA
  • TTSH 11: ADSR and AR
  • TTSH 10: VCOs and VCF
  • TTSH 9: All Components Available
  • TTSH 8: Thonk and Balzer Components
  • TTSH 7: Transistor Matching
  • TTSH 6: Soldering
  • TTSH 5: Mouser the 2nd
  • TTSH 4: Mouser Components
  • TTSH 3: Components and PSU
  • TTSH 2: Delivery
  • TTSH 1 - The Story Begins
  • TTSH
  • DDRM
  • DDRM Expander
  • Photo Albums
  • Content
  • Timeline
  • Categories
  • Campacasa Home
© Campacasa (Peter Kamphuis) - email | Privacy Policy | Built with Koken