Tuesday, June 30, 2020
Thursday, May 14, 2020
Chorus Circuit
Specifications:
- 2 Control Knobs: Rate and Depth
- Connectors: Input, Output, AC Adaptor
- Input Impedance: 470kOhm
- Signal/Noise Ratio: more than 90dB (IHF-A)
- Output Load Impedance: over 10kOhm
- Maximum Allowable input: 0dBm(100Hz), -10dBm(1kHz)
- Recommended AC Adaptor: ACA Series
- Current Draw: 9 mA (DC 9V)
- Weight: 400 grams (0.88 lbs.)
- Dimensions(mm): 70(W) x 55(H) x 125(D)
The circuit is designed around the MN3007 1024 stage BBD (IC3) and the MN3101 clock driver (IC4). The input and output circuits use a uPC4558C IC while the LFO is made with the help of a TL022LP op-amp IC.
Other active components:
D1, D2, D4, D5 and D8: 1S2473 or 1S1588 (switching diodes)
D3: 1S2473 (replaced with a wire jumper in newer models)
D6: RD5.1EB (5.1V Zener diode)
D7: RD11EB (11V Zener diode)
Q1-Q3: 2SC732TM-GR (NPN silicon transistors)
Q4-Q8: 2SC945-P (NPN silicon transistors)
Q9: 2SK30A-Y (Silicon N-channel junction field effect transistor)
LED diode: SLP-135B
Adjustment procedure:
Turn the Rate knob fully counterclockwise (min.) and the Depth knob fully clockwise (max.). Feed a 200Hz, +3dBm sine signal into the input. Connect an oscilloscope to the emitter of Q3 and turn VR3 until you'll get a centered operating point (a symmetrical sine wave, equally clipped at top and bottom).
https://www.hobby-hour.com/electronics/s/boss-ce2-chorus-schematic.php
Flanger Circuit
Specifications:
- 4 controls: Manual, Depth, Rate and Resonance (Res)
- Connectors: Input, Output, AC Adaptor
- Input impedance: 470k
- Residual noise: -95dBm (IHF-A)
- Output load impedance: over 10k
- Delay Time: 1ms - 13ms
- LFO speed: 100ms - 16s
- Recommended AC Adaptor: ACA or PSA Series -- depending on production year
- Current draw: 15mA DC at 9V
- Weight: 400 g (0.88lbs.)
- Dimensions: 70(W) x 55(H) x 125(D) mm. (2.8" x 2.2" x 4.9")
ICs, transistors and diodes used in the Boss BF-2:
- IC1, IC2: uPC4558C (dual operational amplifier)
- IC3: MN3207 (1024 stage BBD)
- IC4: MN3102 (BBD driver)
- IC5: TL022CP (dual low-power general-purpose operational amplifier)
- IC6: uPC78L05 or equivalents (5V positive voltage regulator)
- Q1, Q2, Q3: 2SC732TM-GR (NPN silicon transistor)
- Q4: 2SK30A-Y (Silicon N-channel junction field effect transistor)
- Q5: 2SA733-P (PNP silicon transistor)
- Q6-Q11: 2SC945-P (NPN silicon transistor)
- D1: RD11EB-3 (11V 500mW Zener diode)
- D2: RD5.1EB-3 (5.1V 500mW Zener diode)
- D3-D10: 1S2473 or 1S1588 or DS442 (switching diodes)
Adjustment procedure:
1.) Clock frequency adjustment:
Set MANUAL and DEPTH knobs to full counterclockwise. Connect an oscilloscope to TP-1 test point. Adjust VR7 for T=25us (40kHz). Rotate the MANUAL knob fully clockwise. T should be 2uS +/-20%.
2.) BBD bias:
Set DEPTH and RES. knobs full counterclockwise. Feed a 200Hz, sine wave, 0dBm signal into the INPUT jack. Connect the oscilloscope to Q3's emitter. While turning MANUAL across its entire rotation range, set VR6 for a clip-free waveform at the peaks.
3.) Resonance:
Set MANUAL, DEPTH knobs full counterclockwise and RES. knob full clockwise. Plug short circuit into INPUT jack. Connect OUTPUT jack to an amplifier and speaker. While touching a screwdriver to TP-2, set VR5 to the point where oscillation begins.
https://www.hobby-hour.com/electronics/s/boss-bf2-flanger.php
Thursday, April 9, 2020
Thursday, March 26, 2020
Wednesday, March 18, 2020
Python Script to Fetch Webpage Source
import urllib2
for i in range(4,20):
url = 'https://namaanakperempuan.net/nama-bayi-perempuan-jawa-dan-artinya/%d/'%(i)
response = urllib2.urlopen(url)
webContent = response.read()
f = open('bayi%d.html'%(i), 'w')
f.write(webContent)
f.close
Friday, February 21, 2020
Supplier Komponen Elektronik di Surabaya
Sunday, February 16, 2020
Voltage Regulator Circuits
Friday, February 14, 2020
Thursday, February 13, 2020
Penguat Mic Bebas Jarak Saturn AF-007
R1: 680R
R2: 68K
R3: 27K
R4, R5: 2K2
R6: 22K
R7, R9. R10, R12: 1K
R8, R13: 10K
R11: 100K
C1, C4: 2,2uF/25V
C2: 4,7uF/25V
C3: 22uF/25V
C5, C7: 1uF/25V
C6, C9: 47uF/25V
C8: 100uF/25V
C10, C11: 120pF
T1, T2, T3: BC547, BC549
D1, D2: IN4148